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Cheap flights from Seattle (SEA) to Basel EuroAirport Swiss (BSL) from $425

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/30. 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.
SEA — BSL
Jun 7 — Jun 141
From?
To?
Fri 6/7
Fri 6/14
1 adult, Economy
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Cheap flight deals from Seattle to Basel

Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Basel (BSL). 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 June 2, 2024.

Popular in

June

Cheapest in

February

Average price

$1,598

Round-trip from

$558
High demand for flights, 41% potential price rise
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Best time to find cheap flights, 37% potential price drop
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Average for round-trip flights in June 2024
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From Seattle/Tacoma Intl to Basel EuroAirport Swiss
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What is the cheapest day to fly round-trip from Seattle to Basel EuroAirport Swiss?

Thursday flights are generally found to be more expensive for flights from Seattle to Basel EuroAirport Swiss. This shouldn’t discourage you from searching, as you can still find great deals by being flexible with your options. Use our search form to find deals on tickets to Basel EuroAirport Swiss.

What is the cheapest month to fly from Seattle to Basel EuroAirport Swiss?

Flights from Seattle to Basel EuroAirport Swiss lean towards being more expensive in June. Prices are generally better when you fly from Seattle to Basel EuroAirport Swiss in November, with the cheapest ticket starting at $494.

What is the cheapest time of day to fly from SEA to BSL?

A simple way to save on the total cost of your ticket is to fly from Seattle to Basel EuroAirport Swiss in the evening. If you’re flexible enough to do this you can expect to save up to 18% on your trip compared to booking a flight in the afternoon.

Cheap British Airways flights from Seattle to Basel

Explore cheap flight options specifically provided by British Airways for the route between Seattle and Basel. 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 2,807,690 searches. Data last updated June 2, 2024.
Take a peek at the cheapest British Airways flights we've detected traveling from Seattle to Basel. Make sure to check back often as deals are often changing.
Wed 10/307:45 pmSEA - BSL
1 stop14h 35mBritish Airways
Tue 11/127:00 amBSL - SEA
1 stop18h 45mBritish Airways
Deal found 6/2$425
Wed 11/61:39 pmSEA - BSL
2 stops19h 41mBritish Airways
Wed 11/136:25 amBSL - SEA
1 stop19h 20mBritish Airways
Deal found 6/1$430
Wed 10/307:45 pmSEA - BSL
1 stop14h 35mBritish Airways
Tue 11/127:00 amBSL - SEA
2 stops21h 03mBritish Airways
Deal found 6/1$435
Wed 11/61:39 pmSEA - BSL
2 stops19h 41mBritish Airways
Wed 11/136:25 amBSL - SEA
2 stops21h 38mBritish Airways
Deal found 6/2$440
Sun 11/176:45 pmSEA - BSL
1 stop15h 10mBritish Airways
Wed 11/2711:10 amBSL - SEA
1 stop14h 35mBritish Airways
Deal found 6/1$442
Sun 11/172:03 pmSEA - BSL
2 stops19h 52mBritish Airways
Wed 11/276:25 amBSL - SEA
1 stop19h 20mBritish Airways
Deal found 6/1$447
Sun 11/1710:30 amSEA - BSL
2 stops23h 25mBritish Airways
Wed 11/277:15 pmBSL - SEA
2 stops32h 48mBritish Airways
Deal found 6/1$468
Tue 9/37:40 pmSEA - BSL
1 stop13h 40mBritish Airways
Fri 9/2011:45 amBSL - SEA
2 stops20h 24mBritish Airways
Deal found 6/2$564
Sat 9/2111:59 pmSEA - BSL
2 stops37h 56mBritish Airways
Mon 9/307:10 pmBSL - SEA
1 stop25h 25mBritish Airways
Deal found 6/1$587

Cheap American Airlines flights from Seattle to Basel

Explore cheap flight options specifically provided by American Airlines for the route between Seattle and Basel. 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 2,807,690 searches. Data last updated June 2, 2024.
Have a look at some of the cheapest available American Airlines flights departing from Seattle and landing in Basel. Make sure to examine the flight information before completing your reservation.
Sun 11/176:45 pmSEA - BSL
1 stop18h 30mAmerican Airlines
Wed 11/276:25 amBSL - SEA
1 stop19h 20mAmerican Airlines
Deal found 6/2$454
Wed 10/3012:01 pmSEA - BSL
2 stops22h 19mAmerican Airlines
Tue 11/127:00 amBSL - SEA
2 stops21h 03mAmerican Airlines
Deal found 6/1$469
Wed 9/258:00 amSEA - BSL
2 stops18h 20mAmerican Airlines
Wed 10/166:35 amBSL - SEA
1 stop14h 00mAmerican Airlines
Deal found 6/1$559
Sun 8/41:26 pmSEA - BSL
2 stops24h 29mAmerican Airlines
Thu 8/226:35 amBSL - SEA
2 stops24h 21mAmerican Airlines
Deal found 6/1$569
Sun 8/47:40 pmSEA - BSL
1 stop18h 15mAmerican Airlines
Thu 8/226:35 amBSL - SEA
2 stops20h 07mAmerican Airlines
Deal found 6/2$614
Sun 8/41:26 pmSEA - BSL
2 stops24h 29mAmerican Airlines
Thu 8/226:35 amBSL - SEA
2 stops23h 06mAmerican Airlines
Deal found 6/2$619
Tue 11/51:43 amSEA - BSL
2 stops28h 12mAmerican Airlines
Wed 11/133:40 pmBSL - SEA
1 stop34h 05mAmerican Airlines
Deal found 6/2$664
Tue 11/51:43 amSEA - BSL
2 stops28h 12mAmerican Airlines
Wed 11/136:25 amBSL - SEA
2 stops21h 38mAmerican Airlines
Deal found 6/2$679
Sat 8/312:13 amSEA - BSL
2 stops37h 42mAmerican Airlines
Thu 8/226:35 amBSL - SEA
2 stops21h 45mAmerican Airlines
Deal found 6/1$782

Cheap Seattle to Basel flights in June & July 2024

Find cheap flight options from Seattle to Basel specifically for the months of June and July 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 2,807,690 searches. Prices were last updated on June 2, 2024.
Check out some of the best flight deals from Seattle to Basel in 2024. Check back regularly for other flight deals.
Wed 6/197:10 amSEA - BSL
2 stops18h 05mDelta
Tue 8/2710:55 amBSL - SEA
1 stop15h 45mDelta
Deal found 6/1$805
Wed 6/197:10 amSEA - BSL
2 stops18h 05mDelta
Tue 8/2710:55 amBSL - SEA
2 stops20h 28mDelta
Deal found 6/1$815
Mon 6/101:30 pmSEA - BSL
1 stop24h 25mBritish Airways
Tue 6/186:40 amBSL - SEA
1 stop13h 55mBritish Airways
Deal found 6/1$825
Sun 6/231:25 pmSEA - BSL
2 stops24h 30mAmerican Airlines
Mon 7/16:35 amBSL - SEA
2 stops24h 22mAmerican Airlines
Deal found 6/1$862
Mon 6/1011:00 pmSEA - BSL
2 stops25h 45mDelta
Tue 6/1810:55 amBSL - SEA
1 stop15h 40mDelta
Deal found 6/1$939
Fri 6/141:25 pmSEA - BSL
2 stops24h 30mBritish Airways
Fri 6/217:45 pmBSL - SEA
2 stops33h 03mBritish Airways
Deal found 6/2$1,003
Mon 6/1011:35 pmSEA - BSL
2 stops38h 20mAmerican Airlines
Tue 6/186:40 amBSL - SEA
2 stops22h 08mAmerican Airlines
Deal found 6/1$1,005
Wed 6/191:35 pmSEA - BSL
1 stop19h 25mAir France
Tue 8/2710:55 amBSL - SEA
1 stop15h 45mAir France
Deal found 6/1$1,037
Sun 6/231:35 pmSEA - BSL
1 stop19h 25mDelta
Mon 7/16:20 amBSL - SEA
1 stop12h 55mDelta
Deal found 6/1$1,263

Seattle to Basel 2024 flight deals

Discover exclusive flight deals for travel between Seattle and Basel in 2024. Find excellent offers based on user searches. Over the last 7 days, Cheapflights users made 2,807,690 searches. Data last updated June 2, 2024.
Check out some of the best flight deals from Seattle to Basel in 2024. Check back regularly for other flight deals.
Wed 10/307:45 pmSEA - BSL
1 stop18h 15mBritish Airways
Tue 11/127:00 amBSL - SEA
1 stop18h 45mBritish Airways
Deal found 6/1$425
Wed 11/61:39 pmSEA - BSL
2 stops19h 41mBritish Airways
Wed 11/136:25 amBSL - SEA
1 stop19h 20mBritish Airways
Deal found 6/1$430
Wed 10/307:45 pmSEA - BSL
1 stop14h 35mBritish Airways
Tue 11/127:00 amBSL - SEA
2 stops21h 03mBritish Airways
Deal found 6/1$435
Wed 11/61:39 pmSEA - BSL
2 stops19h 41mBritish Airways
Wed 11/1311:10 amBSL - SEA
2 stops19h 33mBritish Airways
Deal found 6/1$440
Sun 11/176:45 pmSEA - BSL
1 stop15h 10mBritish Airways
Wed 11/2711:10 amBSL - SEA
1 stop14h 35mBritish Airways
Deal found 6/1$442
Sun 11/172:03 pmSEA - BSL
2 stops19h 52mBritish Airways
Wed 11/276:25 amBSL - SEA
1 stop19h 20mBritish Airways
Deal found 6/1$447
Sun 11/176:45 pmSEA - BSL
1 stop18h 30mAmerican Airlines
Wed 11/276:25 amBSL - SEA
1 stop19h 20mAmerican Airlines
Deal found 6/2$454
Sun 11/1710:30 amSEA - BSL
2 stops23h 25mBritish Airways
Wed 11/277:15 pmBSL - SEA
2 stops32h 48mBritish Airways
Deal found 6/1$468
Wed 10/3012:01 pmSEA - BSL
2 stops22h 19mAmerican Airlines
Tue 11/127:00 amBSL - SEA
2 stops21h 03mAmerican Airlines
Deal found 6/1$469

Seattle to Basel flights leaving soon

Find last-minute flight options from Seattle to Basel 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 2,807,690 searches. Data last updated June 2, 2024.
Have a look at some of the last-minute flights available departing from Seattle to Basel. Tip: verify your flight details before completing your reservation.
Mon 6/101:30 pmSEA - BSL
1 stop24h 25mBritish Airways
Tue 6/186:40 amBSL - SEA
1 stop13h 55mBritish Airways
Deal found 6/1$825
Mon 6/1011:00 pmSEA - BSL
2 stops25h 45mDelta
Tue 6/1810:55 amBSL - SEA
1 stop15h 40mDelta
Deal found 6/1$939
Mon 6/1011:35 pmSEA - BSL
2 stops38h 20mAmerican Airlines
Tue 6/186:40 amBSL - SEA
2 stops22h 08mAmerican Airlines
Deal found 6/1$1,005

Find flights from Seattle to Basel within your budget

Customize your flight search to find flights from Seattle to Basel 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 2,807,690 searches. Data last updated June 2, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$425 - $915

Route

Depart

Return

Price

Seattle/Tacoma IntlBasel EuroAirport Swiss

SEA - BSL

SEABSL

Seattle/Tacoma Intl

Wed 10/30

1 stop14h 35m

Basel EuroAirport Swiss

Tue 11/12

1 stop18h 45m

$425

Seattle/Tacoma IntlBasel EuroAirport Swiss

SEA - BSL

SEABSL

Seattle/Tacoma Intl

Wed 11/6

2 stops19h 41m

Basel EuroAirport Swiss

Wed 11/13

1 stop19h 20m

$430

Seattle/Tacoma IntlBasel EuroAirport Swiss

SEA - BSL

SEABSL

Seattle/Tacoma Intl

Wed 10/30

1 stop14h 35m

Basel EuroAirport Swiss

Tue 11/12

2 stops21h 03m

$435

Seattle/Tacoma IntlBasel EuroAirport Swiss

SEA - BSL

SEABSL

Seattle/Tacoma Intl

Sun 11/17

1 stop18h 30m

Basel EuroAirport Swiss

Wed 11/27

1 stop19h 20m

$454

Seattle/Tacoma IntlBasel EuroAirport Swiss

SEA - BSL

SEABSL

Seattle/Tacoma Intl

Wed 10/30

2 stops22h 19m

Basel EuroAirport Swiss

Tue 11/12

2 stops21h 03m

$469

Seattle/Tacoma IntlBasel EuroAirport Swiss

SEA - BSL

SEABSL

Seattle/Tacoma Intl

Sun 11/17

2 stops20h 10m

Basel EuroAirport Swiss

Wed 11/27

2 stops20h 30m

$523

Seattle/Tacoma IntlBasel EuroAirport Swiss

SEA - BSL

SEABSL

Seattle/Tacoma Intl

Sun 8/4

1 stop19h 25m

Basel EuroAirport Swiss

Thu 8/22

1 stop24h 50m

$681

Seattle/Tacoma IntlBasel EuroAirport Swiss

SEA - BSL

SEABSL

Seattle/Tacoma Intl

Sat 8/10

2 stops34h 05m

Basel EuroAirport Swiss

Mon 8/19

1 stop29h 49m

$784

Seattle/Tacoma IntlBasel EuroAirport Swiss

SEA - BSL

SEABSL

Seattle/Tacoma Intl

Sun 11/17

3 stops21h 41m

Basel EuroAirport Swiss

Wed 11/27

2 stops20h 33m

$915

Flights are sorted by cheapest first

Deals found on 6/2

What is the cheapest day to fly from Seattle to Basel EuroAirport Swiss?

Use this chart to determine the cheapest time to fly round-trip from Seattle to Basel. Price data was last updated on June 2, 2024.
Morning
Noon
Afternoon
Evening
All times are departure.
Travelers seeking maximum savings on their Seattle to Basel EuroAirport Swiss flight should consider departing on Sunday afternoons when fares are most often at their lowest. Tuesday at noon 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 Seattle to Basel

Have a flexible travel schedule? Discover the best time to fly to Basel from Seattle 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 Basel by month

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

EAP

Temperature

33.8 - 66.2 °F

Reviews of airlines servicing Basel

Get insights into the airlines that provide service to Basel. 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 Basel. Reviews last updated June 2, 2024.
Read through reviews of airlines operating flights from Seattle to Basel, such as British Airways, American Airlines and Delta. 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
10,402 reviews
Check prices

Food

7.4

Entertainment

8.0

Comfort

7.9

Overall

8.0

Boarding

8.2

Crew

8.6

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
10,402 reviews
Delta
8.0
Very good
10,402 reviews
Check prices

Food

7.4

Entertainment

8.0

Comfort

7.9

Overall

8.0

Boarding

8.2

Crew

8.6

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
7.5
Good
1,728 reviews
Delta
8.0
Very good
10,402 reviews
Check prices

Food

7.4

Entertainment

8.0

Comfort

7.9

Overall

8.0

Boarding

8.2

Crew

8.6

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.

United Airlines
7.4
Good
10,755 reviews
Delta
8.0
Very good
10,402 reviews
Check prices

Food

7.4

Entertainment

8.0

Comfort

7.9

Overall

8.0

Boarding

8.2

Crew

8.6

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.

American Airlines
7.3
Good
14,260 reviews
Delta
8.0
Very good
10,402 reviews
Check prices

Food

7.4

Entertainment

8.0

Comfort

7.9

Overall

8.0

Boarding

8.2

Crew

8.6

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.

British Airways
6.8
Okay
6,755 reviews
Delta
8.0
Very good
10,402 reviews
Check prices

Food

7.4

Entertainment

8.0

Comfort

7.9

Overall

8.0

Boarding

8.2

Crew

8.6

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 Seattle to Basel. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • Can I find flights from Seattle to Basel EuroAirport Swiss for under $500 on Cheapflights?

    Yes, there are multiple flights from Seattle to Basel EuroAirport Swiss for under $500. The cheapest flight booked recently is on British Airways for just $425, but on average you can expect to pay $524.

  • Are there last-minute flights available from Seattle to Basel EuroAirport Swiss for under $900?

    There are currently 3+ open flights from Seattle to Basel EuroAirport Swiss within the next 7 days for less than $900.

  • What are the cheapest airlines flying from Seattle to Basel EuroAirport Swiss round-trip?

    British Airways, at $425, was found to be the cheapest airline from Seattle to Basel EuroAirport Swiss.Alternate airlines to your destination round-trip include American Airlines and Delta. You may be able to fly from Seattle to Basel EuroAirport Swiss for 54% less than the average price by searching for these airlines.

  • What does SEA to BSL mean?

    SEA stands for Seattle/Tacoma Intl Airport, while BSL stands for Basel EuroAirport Swiss. These codes are often called IATA codes, a set of identifiers established by IATA (International Air Transport Association) that is widely used by airlines and the aviation industry.

  • Can I find deals for flights from Seattle to Basel that include extra baggage allowance?

    The amount of baggage you can bring on your Seattle to Basel 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 Seattle to Basel with specific airlines?

    Yes, Cheapflights allows you to browse and filter Seattle to Basel 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 Seattle to Basel that include hotel bookings?

    Yes. In addition to deals on Seattle to Basel flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Seattle to Basel?

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

  • Can I find deals for business class flights from Seattle to Basel?

    Yes. Cheapflights offers flight deals from Seattle to Basel 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 Seattle to Basel that allow pets onboard?

    Many airlines flying from Seattle to Basel 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 Seattle to Basel?

    Yes, you can often find last-minute deals on Seattle to Basel 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 Seattle to Basel EuroAirport Swiss flight deals updated?

    The Seattle to Basel EuroAirport Swiss flight deals you see on this page were last updated on 6/2.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Seattle to Basel
See prices for flight routes from nearby airports that may be better suited for you.

Portland to Basel flights

Top 2 airlines flying from Seattle to Basel

Discover the top 2 airlines that operate flights from Seattle to Basel. 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 2,807,690 searches. Data last updated June 2, 2024.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest$557Average$1,120FlexibilityNo cancel feeOn-time70%
Search British Airways flights
DeltaCheapest$719Average$1,271FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
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Search flights from Seattle to Basel by cabin class

Find flights from Seattle to Basel, based on your preferred cabin class, be it economy, premium economy, business, or first class.
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Fly with Cheapflights

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How does Cheapflights help users find flights from Seattle to Basel?

Cheapflights makes it easy to find Seattle to Basel 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.

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It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from Seattle to Basel.

Can Cheapflights find flights from Seattle to Basel with no change fees?

Yes, we can. To see specific flights from Seattle to Basel with no change fees, users can toggle flexible booking options after using the search form above to find flights.

Can Cheapflights notify me if prices for flights from Seattle to Basel become cheaper?

Not ready to book yet? You can track prices for flights from Seattle to Basel on Cheapflights with our Price Alert feature and get notified when better prices are available.

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