HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news

Cheap flights from Dulles Intl (IAD) to Porto (OPO) from $353

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 7/15. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
IAD — OPO
May 28 — Jun 41
From?
To?
Tue 5/28
Tue 6/4
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

The best prices from Washington, D.C. Dulles Intl to Porto are usually found in January or February, booked 35 days in advance, depart on a Sunday or Saturday and return on a Tuesday

Cheap flight deals from Dulles Intl to Porto

Discover tips and strategies to find the most affordable flight options for your journey from Dulles Intl (IAD) to Porto (OPO). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated May 23, 2024.

Popular in

December

Cheapest in

January

Round-trip from

$523

One-way from

$353
High demand for flights, 30% potential price rise
Search Deals
Best time to find cheap flights, 36% potential price drop
Search Deals
From Washington, D.C. Dulles Intl to Porto
Search Deals
One-way flight from Washington, D.C. Dulles Intl to Porto
Search Deals

What is the cheapest day to fly round-trip from Washington, D.C. Dulles Intl Airport to Porto?

Flying to your destination on a Tuesday can be more expensive, but this shouldn’t discourage you from finding affordable options to get to Porto. Check prices with Cheapflights to find a great deal for your trip.

How far in advance should I book a flight from Washington, D.C. Dulles Intl Airport to Porto?

When searching for a good deal, it’s best to be prepared for potential fluctuations in price. We recommend booking at least 14 days in advance, which can save you up to 35% on flights from Washington, D.C. Dulles Intl Airport to Porto compared to booking the week you need them. Waiting 14 days out may not be for everyone, so we have options available for flights within the next two weeks, with the lowest price starting at $430. For sooner than that we have options available in the next 3 days from $604.

What is the cheapest month to fly from Washington, D.C. Dulles Intl Airport to Porto?

January is one of the best times of the year to fly to Porto from Washington, D.C. Dulles Intl Airport. Prices for January average $618 per person but you can even find prices for as low as $417. The most expensive prices can be found in the month of June. Opting for a January flight can save you 35% on your journey compared to booking in June

When is the cheapest time to fly from Washington, D.C. Dulles Intl Airport to Porto (IAD - OPO)?

It’s typically best to fly out from Washington, D.C. Dulles Intl Airport to Porto at noon. Doing so could potentially save you 42% on the flight price compared to flying in the morning, which is usually more expensive.

Cheap SWISS flights from Dulles Intl to Porto

Explore cheap flight options specifically provided by SWISS for the route between Dulles Intl and Porto. Find affordable fares and compare prices with other airlines to secure the best deal for your journey. Over the last 7 days, Cheapflights users made 2,730,072 searches. Data last updated May 23, 2024.
Peruse some of the lowest-priced SWISS flights we've found from Washington, D.C. to Porto. Deals update often to give you more flight options matching your criteria
Tue 10/2910:00 pmIAD - OPO
1 stop34h 20mSWISS
Sun 11/36:40 pmOPO - IAD
2 stops50h 45mSWISS
Deal found 5/22$588
Sun 9/298:45 pmIAD - OPO
1 stop16h 30mSWISS
Sun 10/132:35 pmOPO - IAD
2 stops30h 40mSWISS
Deal found 5/22$601
Wed 9/258:45 pmIAD - OPO
1 stop30h 10mSWISS
Sat 10/52:35 pmOPO - IAD
2 stops54h 40mSWISS
Deal found 5/22$608
Tue 10/2910:00 pmIAD - OPO
2 stops30h 25mSWISS
Sun 11/36:40 pmOPO - IAD
2 stops50h 45mSWISS
Deal found 5/22$622
Thu 9/268:45 pmIAD - OPO
2 stops17h 25mSWISS
Mon 10/142:35 pmOPO - IAD
2 stops30h 40mSWISS
Deal found 5/22$629
Mon 5/278:45 pmIAD - OPO
1 stop33h 45mSWISS
Mon 6/37:15 pmOPO - IAD
1 stop26h 00mSWISS
Deal found 5/21$1,151
Mon 5/2710:15 pmIAD - OPO
2 stops28h 40mSWISS
Wed 6/58:40 amOPO - IAD
1 stop12h 35mSWISS
Deal found 5/21$1,328
Mon 5/278:45 pmIAD - OPO
2 stops15h 25mSWISS
Mon 6/37:15 pmOPO - IAD
1 stop26h 00mSWISS
Deal found 5/21$1,379

Cheap United Airlines flights from Dulles Intl to Porto

Explore cheap flight options specifically provided by United Airlines for the route between Dulles Intl and Porto. Find affordable fares and compare prices with other airlines to secure the best deal for your journey. Over the last 7 days, Cheapflights users made 2,730,072 searches. Data last updated May 23, 2024.
Some of the best deals we've found on United Airlines flights traveling from Washington, D.C. to Porto. Deals frequently update to provide users with more options.
Fri 11/17:25 pmIAD - OPO
2 stops16h 20mUnited Airlines
Tue 11/56:00 amOPO - IAD
1 stop14h 50mUnited Airlines
Deal found 5/22$591
Fri 11/17:25 pmIAD - OPO
2 stops16h 20mUnited Airlines
Tue 11/56:00 amOPO - IAD
2 stops22h 57mUnited Airlines
Deal found 5/22$602
Fri 8/93:20 pmIAD - OPO
1 stop15h 00mUnited Airlines
Mon 8/196:00 amOPO - IAD
2 stops34h 50mUnited Airlines
Deal found 5/22$777
Tue 5/285:33 pmIAD - OPO
1 stop11h 12mUnited Airlines
Sun 6/212:35 pmOPO - IAD
1 stop13h 10mUnited Airlines
Deal found 5/21$1,146
Thu 5/305:33 pmIAD - OPO
1 stop11h 12mUnited Airlines
Sun 6/212:35 pmOPO - IAD
1 stop13h 10mUnited Airlines
Deal found 5/21$1,196

Cheap Dulles Intl to Porto flights in May & June 2024

Find cheap flight options from Dulles Intl to Porto specifically for the months of May and June 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 2,730,072 searches. Prices were last updated on May 23, 2024.
The lowest fares we've come across on flights traveling from Washington, D.C. to Porto in May and June 2024. For more flight deals, be sure to check back very soon.
Tue 6/254:30 pmIAD - OPO
2 stops21h 50mMultiple Airlines
Wed 7/108:10 pmOPO - IAD
2 stops23h 30mMultiple Airlines
Deal found 5/23$720
Mon 6/106:50 pmIAD - OPO
1 stop20h 10mMultiple Airlines
Sun 6/166:25 amOPO - IAD
2 stops40h 15mMultiple Airlines
Deal found 5/22$789
Tue 5/289:20 pmIAD - OPO
1 stop13h 10mAir France
Wed 6/59:15 amOPO - IAD
1 stop11h 55mAir France
Deal found 5/21$813
Tue 5/289:20 pmIAD - OPO
1 stop13h 10mAir France
Wed 6/59:15 amOPO - IAD
2 stops16h 18mAir France
Deal found 5/21$823
Mon 5/279:20 pmIAD - OPO
1 stop13h 10mDelta
Wed 6/59:15 amOPO - IAD
1 stop11h 55mDelta
Deal found 5/21$824
Tue 6/259:20 pmIAD - OPO
1 stop13h 10mDelta
Wed 7/105:00 amOPO - IAD
1 stop16h 00mDelta
Deal found 5/23$826
Sat 5/254:59 pmIAD - OPO
2 stops17h 31mDelta
Fri 5/319:15 amOPO - IAD
1 stop14h 55mDelta
Deal found 5/22$828
Tue 5/284:59 pmIAD - OPO
2 stops17h 31mDelta
Mon 6/35:00 amOPO - IAD
1 stop15h 35mDelta
Deal found 5/21$830
Mon 5/279:20 pmIAD - OPO
1 stop13h 10mDelta
Thu 6/64:20 pmOPO - IAD
1 stop28h 50mDelta
Deal found 5/21$835

Dulles Intl to Porto 2024 flight deals

Discover exclusive flight deals for travel between Dulles Intl and Porto in 2024. Find excellent offers based on user searches. Over the last 7 days, Cheapflights users made 2,730,072 searches. Data last updated May 23, 2024.
The lowest fares we've come across on flights traveling from Washington, D.C. to Porto in May and June 2024. For more flight deals, be sure to check back very soon.
Thu 11/285:30 pmIAD - OPO
1 stop18h 30mTAP AIR PORTUGAL
Sun 12/88:55 amOPO - IAD
1 stop33h 05mTAP AIR PORTUGAL
Deal found 5/21$420
Tue 12/105:30 pmIAD - OPO
1 stop11h 40mTAP AIR PORTUGAL
Thu 1/95:00 amOPO - IAD
1 stop15h 00mTAP AIR PORTUGAL
Deal found 5/21$422
Mon 12/95:40 pmIAD - OPO
1 stop12h 15mKLM
Thu 1/98:10 pmOPO - IAD
1 stop24h 35mKLM
Deal found 5/21$427
Mon 9/235:35 pmIAD - OPO
1 stop10h 25mTAP AIR PORTUGAL
Mon 10/2110:55 pmOPO - IAD
1 stop21h 25mTAP AIR PORTUGAL
Deal found 5/22$428
Thu 11/2812:30 pmIAD - OPO
2 stops17h 20mDelta
Sun 12/85:00 amOPO - IAD
1 stop15h 45mDelta
Deal found 5/22$430
Mon 9/235:35 pmIAD - OPO
1 stop10h 25mTAP AIR PORTUGAL
Tue 10/225:10 amOPO - IAD
1 stop15h 10mTAP AIR PORTUGAL
Deal found 5/22$431
Thu 11/285:40 pmIAD - OPO
1 stop23h 40mKLM
Sun 12/85:00 amOPO - IAD
1 stop15h 45mKLM
Deal found 5/22$438
Thu 11/286:10 amIAD - OPO
2 stops23h 40mDelta
Wed 12/411:45 amOPO - IAD
2 stops29h 25mDelta
Deal found 5/22$442
Sun 11/245:35 pmIAD - OPO
1 stop16h 50mDelta
Wed 12/411:45 amOPO - IAD
2 stops29h 25mDelta
Deal found 5/22$451

Dulles Intl to Porto flights leaving soon

Find last-minute flight options from Dulles Intl to Porto for spontaneous travel. Discover available flights and compare prices based on user searches. Secure great deals and offers for spontaneous trips with quick booking options. Over the last 7 days, Cheapflights users made 2,730,072 searches. Data last updated May 23, 2024.
Book one of these great deals on flights from Washington, D.C. to Porto. It's wise to confirm all flight details are correct before booking.
Tue 5/289:20 pmIAD - OPO
1 stop13h 10mAir France
Wed 6/59:15 amOPO - IAD
1 stop11h 55mAir France
Deal found 5/21$813
Tue 5/289:20 pmIAD - OPO
1 stop13h 10mAir France
Wed 6/59:15 amOPO - IAD
2 stops16h 18mAir France
Deal found 5/21$823
Mon 5/279:20 pmIAD - OPO
1 stop13h 10mDelta
Wed 6/59:15 amOPO - IAD
1 stop11h 55mDelta
Deal found 5/21$824
Tue 5/289:20 pmIAD - OPO
1 stop13h 10mDelta
Sat 6/155:00 amOPO - IAD
1 stop15h 35mDelta
Deal found 5/22$826
Sat 5/254:59 pmIAD - OPO
2 stops17h 31mDelta
Fri 5/319:15 amOPO - IAD
1 stop14h 55mDelta
Deal found 5/22$828
Sun 5/264:59 pmIAD - OPO
2 stops17h 31mDelta
Thu 5/305:00 amOPO - IAD
1 stop15h 35mDelta
Deal found 5/22$830
Mon 5/279:20 pmIAD - OPO
1 stop13h 10mDelta
Thu 6/64:20 pmOPO - IAD
1 stop28h 50mDelta
Deal found 5/21$835
Thu 5/305:25 pmIAD - OPO
1 stop23h 50mKLM
Wed 6/129:15 amOPO - IAD
1 stop14h 55mKLM
Deal found 5/22$836
Sat 5/254:59 pmIAD - OPO
2 stops17h 31mDelta
Fri 5/319:15 amOPO - IAD
2 stops18h 59mDelta
Deal found 5/22$838

One-way flights to Porto from Dulles Intl

Search for one-way flight options from Dulles Intl to Porto. Find affordable one-way fares based on user searches. Compare prices and availability to plan your one-way journey according to your preferred dates and budget. Over the last 7 days, Cheapflights users made 2,730,072 searches. Data last updated May 23, 2024.
Users in need of a one-way flight from Washington, D.C. to Porto can choose from these deals. Those seeking round-trip flights from Washington, D.C. to Porto should utilize the search form at the the top of the page.
Mon 7/156:50 pmIAD - OPO
1 stop20h 10mPLAY
Deal found 5/22$353
Sun 8/45:40 pmIAD - OPO
1 stop12h 15mTAP AIR PORTUGAL
Deal found 5/22$400
Tue 8/65:00 pmIAD - OPO
1 stop11h 00mTAP AIR PORTUGAL
Deal found 5/22$409
Sat 7/209:20 pmIAD - OPO
1 stop15h 40mRoyal Air Maroc
Deal found 5/23$416
Mon 8/510:25 pmIAD - OPO
1 stop11h 35mTAP AIR PORTUGAL
Deal found 5/22$428
Sat 8/35:10 pmIAD - OPO
1 stop16h 50mTAP AIR PORTUGAL
Deal found 5/22$439
Sun 8/410:20 pmIAD - OPO
2 stops16h 00mMultiple Airlines
Deal found 5/22$463
Sun 7/2110:20 pmIAD - OPO
1 stop17h 50mTAP AIR PORTUGAL
Deal found 5/22$476
Sat 7/2011:15 pmIAD - OPO
2 stops29h 20mMultiple Airlines
Deal found 5/23$483

Find flights from Dulles Intl to Porto within your budget

Customize your flight search to find flights from Dulles Intl to Porto that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,730,072 searches. Data last updated May 23, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$428 - $645

Route

Depart

Return

Price

Washington, D.C. Dulles IntlPorto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Mon 9/23

1 stop10h 25m

Porto

Mon 10/21

1 stop21h 25m

$428

Washington, D.C. Dulles IntlPorto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Mon 10/21

2 stops21h 57m

Porto

Thu 10/31

2 stops43h 46m

$554

Washington, D.C. Dulles IntlPorto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Tue 8/20

1 stop13h 10m

Porto

Thu 8/29

1 stop14h 05m

$556

Washington, D.C. Dulles IntlPorto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Mon 9/23

1 stop12h 15m

Porto

Sun 10/20

1 stop24h 05m

$569

Washington, D.C. Dulles IntlPorto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Tue 10/29

1 stop34h 20m

Porto

Sun 11/3

2 stops50h 45m

$588

Washington, D.C. Dulles IntlPorto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Fri 11/1

2 stops16h 20m

Porto

Tue 11/5

1 stop14h 50m

$591

Washington, D.C. Dulles IntlPorto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Sun 9/22

1 stop13h 10m

Porto

Sun 10/20

1 stop11h 55m

$612

Washington, D.C. Dulles IntlPorto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Tue 8/20

2 stops21h 10m

Porto

Fri 9/13

2 stops17h 41m

$616

Washington, D.C. Dulles IntlPorto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Fri 8/2

1 stop20h 10m

Porto

Sat 8/31

1 stop25h 45m

$645

Flights are sorted by cheapest first

Deals found on 5/22

When is the best time to book a flight from Washington, D.C. Dulles Intl Airport to Porto?

Use this chart to determine the optimal time to book a round-trip flight from Dulles Intl to Porto. Price data was last updated on May 10, 2024.
To ensure you get the cheapest price possible for a flight from Washington, D.C. Dulles Intl Airport to Porto, you should look to book at least 35 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.
Search Deals

When is the cheapest time to fly from Washington, D.C. Dulles Intl Airport to Porto?

Use this chart to determine the cheapest time to fly round-trip from Dulles Intl to Porto. Price data was last updated on May 19, 2024.
Morning
Noon
Afternoon
Evening
All times are departure.
Travelers seeking maximum savings on their Washington, D.C. Dulles Intl Airport to Porto flight should consider departing on Friday afternoons when fares are most often at their lowest. Friday mornings flights should be avoided if possible as fares are typically the most expensive at this time.
Search Deals

Best time to book a flight from Dulles Intl to Porto

Have a flexible travel schedule? Discover the best time to fly to Porto from Dulles Intl with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Temperature and rainfall in Porto by month

Plan your trip to Porto by taking into account the average temperature and rainfall totals by month.

OPO

Temperature

48.2 - 68 °F

Reviews of airlines servicing Porto

Get insights into the airlines that provide service to Porto. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Porto. Reviews last updated May 23, 2024.
To help decide which airline to fly from Washington, D.C. to Porto, see what other customers have to say about SWISS, United Airlines and KLM. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
10,561 reviews
Check prices

Crew

8.6

Entertainment

8.0

Overall

8.0

Boarding

8.2

Food

7.4

Comfort

7.9

Reviews

1 / 10

Bad experience with the staff boarding the gate. I couldn’t board with my carry on, personal item and a funny bag. I had to put my passport inside my pockets and put the funny bag inside the personal item. Then after passing the staff pull out everything again.

Delta
8.0
Very good
10,561 reviews
Delta
8.0
Very good
10,561 reviews
Check prices

Crew

8.6

Entertainment

8.0

Overall

8.0

Boarding

8.2

Food

7.4

Comfort

7.9

Reviews

1 / 10

Bad experience with the staff boarding the gate. I couldn’t board with my carry on, personal item and a funny bag. I had to put my passport inside my pockets and put the funny bag inside the personal item. Then after passing the staff pull out everything again.

KLM
7.9
Good
1,555 reviews
Delta
8.0
Very good
10,561 reviews
Check prices

Crew

8.6

Entertainment

8.0

Overall

8.0

Boarding

8.2

Food

7.4

Comfort

7.9

Reviews

1 / 10

Bad experience with the staff boarding the gate. I couldn’t board with my carry on, personal item and a funny bag. I had to put my passport inside my pockets and put the funny bag inside the personal item. Then after passing the staff pull out everything again.

SWISS
7.8
Good
1,967 reviews
Delta
8.0
Very good
10,561 reviews
Check prices

Crew

8.6

Entertainment

8.0

Overall

8.0

Boarding

8.2

Food

7.4

Comfort

7.9

Reviews

1 / 10

Bad experience with the staff boarding the gate. I couldn’t board with my carry on, personal item and a funny bag. I had to put my passport inside my pockets and put the funny bag inside the personal item. Then after passing the staff pull out everything again.

Austrian Airlines
7.7
Good
1,036 reviews
Delta
8.0
Very good
10,561 reviews
Check prices

Crew

8.6

Entertainment

8.0

Overall

8.0

Boarding

8.2

Food

7.4

Comfort

7.9

Reviews

1 / 10

Bad experience with the staff boarding the gate. I couldn’t board with my carry on, personal item and a funny bag. I had to put my passport inside my pockets and put the funny bag inside the personal item. Then after passing the staff pull out everything again.

Air France
7.6
Good
1,755 reviews
Delta
8.0
Very good
10,561 reviews
Check prices

Crew

8.6

Entertainment

8.0

Overall

8.0

Boarding

8.2

Food

7.4

Comfort

7.9

Reviews

1 / 10

Bad experience with the staff boarding the gate. I couldn’t board with my carry on, personal item and a funny bag. I had to put my passport inside my pockets and put the funny bag inside the personal item. Then after passing the staff pull out everything again.

Related info for your journey

Find useful and relevant information for your journey from Dulles Intl to Porto. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Porto from Washington, D.C. Dulles Intl?

    Located just 6.8 mi from the city center, Porto is the airport most travelers will use when flying to Porto from Washington, D.C. Dulles Intl. Booking flights from Washington, D.C. Dulles Intl to Porto (OPO) should be relatively easy as there are 0 daily inbound flights from Washington, D.C. Dulles Intl from 11 different airlines.

  • Can I find flights from Washington, D.C. Dulles Intl Airport to Porto for under $500 on Cheapflights?

    Yes, there are multiple flights from Washington, D.C. Dulles Intl Airport to Porto for under $500. The cheapest flight booked recently is on TAP AIR PORTUGAL for just $428, but on average you can expect to pay $510.

  • Are there last-minute flights available from Washington, D.C. Dulles Intl Airport to Porto for under $900?

    There are currently 20+ open flights from Washington, D.C. Dulles Intl Airport to Porto within the next 7 days for less than $900.

  • What are the cheapest airlines flying from Washington, D.C. Dulles Intl Airport to Porto round-trip?

    Currently priced at $428, TAP AIR PORTUGAL will fly you from Washington, D.C. Dulles Intl Airport to Porto and back. In addition to TAP AIR PORTUGAL, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Delta and KLM - these airlines can fly you to your destination from $556 and $569, respectively. These flights start at 37% lower than the current average price 3 months from now.

  • What are the cheapest airlines to fly from Washington, D.C. Dulles Intl Airport to Porto one-way?

    $353 is the cheapest one-way deal found within the past few days, from PLAY. You may also be able to find cheap deals on TAP AIR PORTUGAL and Royal Air Maroc, with prices starting from $400 and $416, respectively.

  • What does IAD to OPO mean?

    These are just IATA (International Air Transport Association) codes. They are used in aviation to identify and differentiate airports. That’s why a Washington, D.C. Dulles Intl Airport to Porto Airport flight would often be abbreviated as a IAD to OPO flight.

  • Where are the most common layover locations when flying from Washington, D.C. Dulles Intl Airport to Porto?

    Flights departing from Washington, D.C. Dulles Intl Airport and landing in Porto layover in Lisbon most frequently.

  • What are some popular things to do or see while on a layover in Lisbon?

    Most Lisbon visitors opt to spend their time experiencing Chiado, Praça do Príncipe Real, and Praça de D. Pedro IV. Travelers on a layover in Lisbon can visit Chiado, Praça do Príncipe Real, and Praça de D. Pedro IV, by traveling 4.5 mi, 4.2 mi, and 4.3 mi, respectively after landing at Lisbon Humberto Delgado. Travelers can book a car rental at Lisbon Humberto Delgado for about $28 per day to make their sightseeing more efficient.

  • Where are the least popular layover locations for Washington, D.C. Dulles Intl Airport to Porto flights?

    Washington, D.C. Dulles Intl Airport to Porto flights have a layover in Madrid least often.

  • Can I find deals for flights from Dulles Intl to Porto that include extra baggage allowance?

    The amount of baggage you can bring on your Dulles Intl to Porto flight depends on the airline and the type of fare you've chosen. After entering your flight details, you'll be able to view the specific baggage policies for each deal in the search results. Keep in mind that certain deals may offer additional baggage allowance.

  • Can I find deals on flights from Dulles Intl to Porto with specific airlines?

    Yes, Cheapflights allows you to browse and filter Dulles Intl to Porto flight deals by airline. After entering your origin and destination, use the available filters to view flights offered by airlines.

  • Can I find deals for flights from Dulles Intl to Porto that include hotel bookings?

    Yes. In addition to deals on Dulles Intl to Porto flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Dulles Intl to Porto?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Dulles Intl to Porto.

  • Can I find deals for business class flights from Dulles Intl to Porto?

    Yes. Cheapflights offers flight deals from Dulles Intl to Porto by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • Can I find deals for flights from Dulles Intl to Porto that allow pets onboard?

    Many airlines flying from Dulles Intl to Porto offer the option to travel with pets. After selecting a flight deal, you can find more information about the airline's pet policy on their official website or by contacting the airline directly. Please note that additional fees and restrictions may apply.

  • Can I find deals on last-minute flights from Dulles Intl to Porto?

    Yes, you can often find last-minute deals on Dulles Intl to Porto flights on Cheapflights. However, these deals can vary and may not always be available. We recommend checking back frequently or signing up for price alerts for the most up-to-date deals.

  • How recently were the Washington, D.C. Dulles Intl Airport to Porto flight deals updated?

    The Washington, D.C. Dulles Intl Airport to Porto flight deals you see on this page were last updated on 5/23.

  • What are the most popular airlines that fly from Washington, D.C. Dulles Intl Airport to Porto?

    Consider American Airlines, Air France or British Airways when booking your flight. These represent the most popular airlines when flying from Washington, D.C. Dulles Intl Airport to Porto.

  • When is the best time to book a flight from Washington, D.C. Dulles Intl Airport to Porto?

    Currently, January is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Porto (average of $523). Flying from Washington, D.C. Dulles Intl Airport to Porto in June is currently the most expensive (average of $995). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Dulles Intl to Porto
See prices for flight routes from nearby airports that may be better suited for you.

Dulles Intl to Lisbon flights
Reagan-National to Lisbon flights
Baltimore to Lisbon flights
Reagan-National to Porto flights
Baltimore to Porto flights
Dulles Intl to Ponta Delgada flights
Reagan-National to Ponta Delgada flights
Dulles Intl to Faro flights
Baltimore to Ponta Delgada flights
Dulles Intl to Funchal flights
Baltimore to Faro flights
Reagan-National to Faro flights
Reagan-National to Funchal flights
Baltimore to Funchal flights
Dulles Intl to Horta flights
Dulles Intl to Lajes flights
Dulles Intl to Pico Island flights
Dulles Intl to Porto Santo flights
Baltimore to Lajes flights

Top 10 airlines flying from Dulles Intl to Porto

Discover the top 10 airlines that operate flights from Dulles Intl to Porto. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,730,072 searches. Data last updated May 23, 2024.
AirlineCheapestAverageFlexibilityOn-time
SWISSCheapest$413Average$476FlexibilityNo cancel feeOn-time79%
Search SWISS flights
Air FranceCheapest$418Average$549FlexibilityNo cancel feeOn-time77%
Search Air France flights
DeltaCheapest$420Average$616FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
LufthansaCheapest$423Average$547FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
KLMCheapest$428Average$568FlexibilityNo cancel feeOn-time75%
Search KLM flights
Brussels AirlinesCheapest$435Average$440FlexibilityNo cancel feeOn-timeN/A
Search Brussels Airlines flights
IberiaCheapest$457Average$673FlexibilityNo cancel feeOn-time77%
Search Iberia flights
United AirlinesCheapest$485Average$1,008FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
British AirwaysCheapest$504Average$591FlexibilityNo cancel feeOn-time70%
Search British Airways flights
TAP AIR PORTUGALCheapest$531Average$946FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
Baltimore to Las Vegas flights
Los Angeles to Orlando flights
Chicago to Nashville flights
Los Angeles to Dubai flights
Atlanta to Nashville flights
Los Angeles to Honolulu flights
Seattle to Tokyo flights
Seattle to Sacramento flights
New York to West Palm Beach flights
Baltimore to Orlando flights
Boston to Baltimore flights
Washington, D.C. Dulles Intl Airport to Örebro flights

Search flights from Dulles Intl to Porto by cabin class

Find flights from Dulles Intl to Porto, based on your preferred cabin class, be it economy, premium economy, business, or first class.
First Class
Business Class
Prem Econ Class
Economy Class

Book a flight to one of these trending destinations

User searches for flights to these destinations increased 20% or more in the past 90 days compared to other destinations
Flights to Neiva La Marguita
Flights to Hyannis Barnstable
Flights to Laayoune Hassan I
Flights to Edremit/Korfez
Flights to Vava'u Lupepau'U
Flights to Surigao
Flights to Melilla
Flights to Virac
Flights to Rhinelander Oneida County
Flights to Cornwall Newquay
Flights to Parikia Paros
Flights to Cortez Montezuma County
Flights to Mason City
Flights to Ningbo Lishe Intl
Flights to Miyakojima Hirara
Flights to Kirkwall Arpt
Flights to Girona Costa Brava
Flights to Provincetown
Flights to Perugia Sant Egidio
Flights to Samos
Flights to Constanţa Mihail Kogalniceanu
Flights to Dharamshala Kangra
Flights to Dalaman
Flights to Pellston Emmet County

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Dulles Intl to Porto?

Cheapflights makes it easy to find Dulles Intl to Porto flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

Why should you use Cheapflights to find cheap flight tickets from Dulles Intl to Porto?

Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from Dulles Intl to Porto for you. Better yet — we are completely free to use.

Can Cheapflights find flights from Dulles Intl to Porto with no change fees?

Cheapflights does show flights with no change fees to all users. To see these options for flights from Dulles Intl to Porto, users can toggle the no change fees filter when performing a flight search.

Can Cheapflights notify me if prices for flights from Dulles Intl to Porto become cheaper?

Yes! Start tracking prices for Dulles Intl to Porto flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.

100% Free
Cheapflights is completely free to use, so you can start saving the moment you arrive.
Book with Flexibility
Our users can plan ahead with confidence and find flights with no change fees
Travel Smart
Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.
View all available airlines