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Cheap flights from St. Louis to Portland (STL - PWM) from $125

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 9/16. 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.
STL — PWM
Jun 11 — Jun 181
From?
To?
Tue 6/11
Tue 6/18
1 adult, Economy
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The best prices from Lambert-St Louis to Portland are usually found in January or February, booked 1 days in advance, depart on a Wednesday or Tuesday and return on a Wednesday

Cheap flight deals from St. Louis to Portland

Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) to Portland (PWM). 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 6, 2024.

Popular in

March

Cheapest in

January

Round-trip from

$293

One-way from

$136
High demand for flights, 23% potential price rise
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Best time to find cheap flights, 41% potential price drop
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From Lambert-St Louis to Portland
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One-way flight from Lambert-St Louis to Portland
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What is the cheapest day to fly round-trip from St. Louis to Portland, Maine?

Users have found that flying from St. Louis to Portland, Maine on a Saturday typically leans towards higher prices. However, this doesn’t mean you still can’t find a deal. Flexibility with other aspects of your flight can still land a great price for your trip.

What is the cheapest month to fly from St. Louis to Portland, Maine?

Due to multiple factors, expect to potentially pay more when booking in March. For low rates, January can be a great choice for travel to Portland, Maine. Flights to Portland, Maine from St. Louis in January are about $466 on average during January, but can be found for as low as $193.

What is the cheapest time of day to fly from STL to PWM?

When flying from St. Louis to Portland, Maine, the time of day you fly usually plays a role in the price. Save by searching for a flight in the evening, which can drop the price by up to 43% versus a flight at noon.

Cheap St. Louis to Portland flights in June & July 2024

Find cheap flight options from St. Louis to Portland specifically for the months of June and July 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 3,050,429 searches. Prices were last updated on June 6, 2024.
Check out some of the best flight deals from St. Louis to Portland in 2024. Check back regularly for other flight deals.
Sat 7/137:33 pmSTL - PWM
1 stop15h 24mFrontier
Tue 7/232:51 pmPWM - STL
1 stop18h 52mFrontier
Deal found 6/6$208
Sat 7/137:33 pmSTL - PWM
1 stop15h 24mFrontier
Tue 7/232:51 pmPWM - STL
1 stop18h 52mFrontier
Deal found 6/5$230
Mon 6/176:16 pmSTL - PWM
1 stop13h 50mFrontier
Thu 6/201:57 pmPWM - STL
1 stop18h 10mFrontier
Deal found 6/5$234
Wed 6/195:15 amSTL - PWM
1 stop5h 55mAmerican Airlines
Wed 6/266:00 amPWM - STL
1 stop7h 16mAmerican Airlines
Deal found 6/5$289
Mon 7/223:49 pmSTL - PWM
1 stop5h 11mDelta
Wed 7/316:02 amPWM - STL
1 stop6h 40mDelta
Deal found 6/6$316
Wed 7/36:08 amSTL - PWM
1 stop15h 31mAmerican Airlines
Wed 7/105:58 amPWM - STL
1 stop11h 49mAmerican Airlines
Deal found 6/5$319
Sat 7/204:52 pmSTL - PWM
1 stop4h 43mAmerican Airlines
Wed 7/244:15 pmPWM - STL
1 stop5h 34mAmerican Airlines
Deal found 6/6$326
Sat 7/135:46 pmSTL - PWM
1 stop5h 00mAmerican Airlines
Sat 7/205:59 amPWM - STL
1 stop7h 43mAmerican Airlines
Deal found 6/5$356
Sat 7/133:18 pmSTL - PWM
1 stop7h 28mAmerican Airlines
Sat 7/205:59 amPWM - STL
1 stop7h 43mAmerican Airlines
Deal found 6/6$366

St. Louis to Portland 2024 flight deals

Discover exclusive flight deals for travel between St. Louis and Portland in 2024. Find excellent offers based on user searches. Over the last 7 days, Cheapflights users made 3,050,429 searches. Data last updated June 6, 2024.
Check out some of the best flight deals from St. Louis to Portland in 2024. Check back regularly for other flight deals.
Mon 8/199:20 pmSTL - PWM
1 stop10h 42mFrontier
Sat 8/2411:46 amPWM - STL
1 stop20h 16mFrontier
Deal found 6/4$196
Sat 7/137:33 pmSTL - PWM
1 stop15h 24mFrontier
Tue 7/232:51 pmPWM - STL
1 stop18h 52mFrontier
Deal found 6/6$208
Mon 8/199:20 pmSTL - PWM
1 stop10h 42mFrontier
Thu 8/2211:46 amPWM - STL
1 stop20h 16mFrontier
Deal found 6/4$220
Sat 7/137:33 pmSTL - PWM
1 stop15h 24mFrontier
Tue 7/232:51 pmPWM - STL
1 stop18h 52mFrontier
Deal found 6/5$230
Mon 6/176:16 pmSTL - PWM
1 stop13h 50mFrontier
Thu 6/201:57 pmPWM - STL
1 stop18h 10mFrontier
Deal found 6/5$234
Tue 10/155:37 amSTL - PWM
1 stop4h 47mAmerican Airlines
Tue 10/225:13 pmPWM - STL
1 stop4h 54mAmerican Airlines
Deal found 6/5$286
Wed 6/195:15 amSTL - PWM
1 stop5h 55mAmerican Airlines
Wed 6/266:00 amPWM - STL
1 stop7h 16mAmerican Airlines
Deal found 6/5$289
Thu 9/263:55 pmSTL - PWM
1 stop5h 00mDelta
Tue 10/112:58 pmPWM - STL
1 stop5h 23mDelta
Deal found 6/5$296
Mon 9/165:29 amSTL - PWM
1 stop5h 57mAmerican Airlines
Mon 9/2312:16 pmPWM - STL
1 stop5h 43mAmerican Airlines
Deal found 6/5$306

St. Louis to Portland flights leaving soon

Find last-minute flight options from St. Louis to Portland 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 3,050,429 searches. Data last updated June 6, 2024.
Book one of these great deals on flights from St. Louis to Portland. It's wise to confirm all flight details are correct before booking.
Mon 6/176:16 pmSTL - PWM
1 stop13h 50mFrontier
Thu 6/201:57 pmPWM - STL
1 stop18h 10mFrontier
Deal found 6/5$234
Wed 6/195:15 amSTL - PWM
1 stop5h 55mAmerican Airlines
Wed 6/266:00 amPWM - STL
1 stop7h 16mAmerican Airlines
Deal found 6/5$289
Wed 6/191:55 pmSTL - PWM
2 stops21h 46mMultiple Airlines
Wed 6/261:30 pmPWM - STL
3 stops28h 58mMultiple Airlines
Deal found 6/5$440
Wed 6/1912:15 pmSTL - PWM
3 stops23h 26mMultiple Airlines
Wed 6/261:30 pmPWM - STL
3 stops28h 58mMultiple Airlines
Deal found 6/5$462
Tue 6/186:11 amSTL - PWM
1 stop8h 50mAmerican Airlines
Sat 6/225:31 amPWM - STL
1 stop5h 54mAmerican Airlines
Deal found 6/5$470
Wed 6/196:00 amSTL - PWM
2 stops16h 53mAmerican Airlines
Wed 6/266:01 amPWM - STL
2 stops12h 17mAmerican Airlines
Deal found 6/5$515
Wed 6/196:00 amSTL - PWM
2 stops16h 53mAmerican Airlines
Wed 6/267:17 amPWM - STL
1 stop11h 01mAmerican Airlines
Deal found 6/5$535
Fri 6/1412:15 pmSTL - PWM
3 stops21h 56mMultiple Airlines
Mon 6/171:05 pmPWM - STL
3 stops22h 52mMultiple Airlines
Deal found 6/5$536
Fri 6/1412:15 pmSTL - PWM
3 stops21h 56mMultiple Airlines
Mon 6/171:05 pmPWM - STL
2 stops26h 18mMultiple Airlines
Deal found 6/5$595

One-way flights to Portland from St. Louis

Search for one-way flight options from St. Louis to Portland. 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 3,050,429 searches. Data last updated June 6, 2024.
Some of the best available deals we've found on one-way flights from St. Louis to Portland. Users can also find round-trip St. Louis to Portland flights by using the search form above.
Mon 9/169:20 pmSTL - PWM
1 stop10h 42mFrontier
Deal found 6/5$125
Thu 7/41:06 pmSTL - PWM
1 stop7h 34mDelta
Deal found 6/5$136
Wed 7/37:29 pmSTL - PWM
1 stop12h 42mFrontier
Deal found 6/6$183
Thu 7/46:22 pmSTL - PWM
3 stops21h 51mMultiple Airlines
Deal found 6/5$210
Thu 7/48:05 amSTL - PWM
2 stops14h 48mUnited Airlines
Deal found 6/5$244
Thu 7/46:00 amSTL - PWM
2 stops28h 09mAmerican Airlines
Deal found 6/5$248
Wed 7/31:55 pmSTL - PWM
2 stops21h 00mMultiple Airlines
Deal found 6/6$257
Mon 9/165:20 pmSTL - PWM
2 stops29h 39mUnited Airlines
Deal found 6/5$264
Mon 9/165:20 pmSTL - PWM
3 stops17h 11mUnited Airlines
Deal found 6/5$301

Find flights from St. Louis to Portland within your budget

Customize your flight search to find flights from St. Louis to Portland 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 3,050,429 searches. Data last updated June 6, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$196 - $440

Route

Depart

Return

Price

Lambert-St LouisPortland

STL - PWM

STLPWM

Lambert-St Louis

Mon 8/19

1 stop10h 42m

Portland

Sat 8/24

1 stop20h 16m

$196

Lambert-St LouisPortland

STL - PWM

STLPWM

Lambert-St Louis

Sat 7/13

1 stop15h 24m

Portland

Tue 7/23

1 stop18h 52m

$208

Lambert-St LouisPortland

STL - PWM

STLPWM

Lambert-St Louis

Mon 8/19

1 stop10h 42m

Portland

Thu 8/22

1 stop20h 16m

$220

Lambert-St LouisPortland

STL - PWM

STLPWM

Lambert-St Louis

Sat 7/13

1 stop15h 24m

Portland

Tue 7/23

1 stop18h 52m

$230

Lambert-St LouisPortland

STL - PWM

STLPWM

Lambert-St Louis

Tue 10/15

1 stop4h 47m

Portland

Tue 10/22

1 stop4h 54m

$286

Lambert-St LouisPortland

STL - PWM

STLPWM

Lambert-St Louis

Wed 6/19

1 stop5h 55m

Portland

Wed 6/26

1 stop7h 16m

$289

Lambert-St LouisPortland

STL - PWM

STLPWM

Lambert-St Louis

Thu 9/26

1 stop5h 00m

Portland

Tue 10/1

1 stop5h 23m

$296

Lambert-St LouisPortland

STL - PWM

STLPWM

Lambert-St Louis

Tue 10/8

1 stop7h 29m

Portland

Sat 10/12

1 stop7h 12m

$336

Lambert-St LouisPortland

STL - PWM

STLPWM

Lambert-St Louis

Wed 6/19

2 stops21h 46m

Portland

Wed 6/26

3 stops28h 58m

$440

Flights are sorted by cheapest first

Deals found on 6/4

How far ahead should I book a flight from St. Louis to Portland, Maine?

Use this chart to determine the optimal time to book a round-trip flight from St. Louis to Portland. Price data was last updated on May 31, 2024.
The price you pay for your flight from St. Louis to Portland, Maine may vary depending on when you book. For the best chance of a lower fare, look to book 1 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.
Search Deals

What is the cheapest day to fly from St. Louis to Portland, Maine?

Use this chart to determine the cheapest time to fly round-trip from St. Louis to Portland. Price data was last updated on June 2, 2024.
Morning
Noon
Afternoon
Evening
All times are departure.
Travelers seeking maximum savings on their St. Louis to Portland, Maine flight should consider departing on Monday evenings when fares are most often at their lowest. Monday afternoons 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 St. Louis to Portland

Have a flexible travel schedule? Discover the best time to fly to Portland from St. Louis 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 Portland by month

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

PWM

Temperature

23 - 68 °F

If weather is an important factor for your trip to Portland, Maine, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 68.0 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 23.0 F).

Reviews of airlines servicing Portland

Get insights into the airlines that provide service to Portland. 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 Portland. Reviews last updated June 6, 2024.
Read reviews from past customers who have flown American Airlines, Frontier and Delta from St. Louis to Portland. 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
10,368 reviews

Boarding

8.2

Comfort

7.9

Entertainment

8.0

Overall

8.0

Food

7.4

Crew

8.6

Reviews

1 / 10

When I was going to board, one of the staff members told me that I could not board with my passport bag because it was tree items and I would need to check a bag. This was so stupid ! The bag was small. So I had to put my things in my pockets, put the funny bag inside the other bag. Then go throw it. Then in the plane put everything back again in my funny bag.

Delta
8.0
Very good
10,368 reviews
Delta
8.0
Very good
10,368 reviews

Boarding

8.2

Comfort

7.9

Entertainment

8.0

Overall

8.0

Food

7.4

Crew

8.6

Reviews

1 / 10

When I was going to board, one of the staff members told me that I could not board with my passport bag because it was tree items and I would need to check a bag. This was so stupid ! The bag was small. So I had to put my things in my pockets, put the funny bag inside the other bag. Then go throw it. Then in the plane put everything back again in my funny bag.

United Airlines
7.4
Good
10,696 reviews
Delta
8.0
Very good
10,368 reviews

Boarding

8.2

Comfort

7.9

Entertainment

8.0

Overall

8.0

Food

7.4

Crew

8.6

Reviews

1 / 10

When I was going to board, one of the staff members told me that I could not board with my passport bag because it was tree items and I would need to check a bag. This was so stupid ! The bag was small. So I had to put my things in my pockets, put the funny bag inside the other bag. Then go throw it. Then in the plane put everything back again in my funny bag.

American Airlines
7.3
Good
14,227 reviews
Delta
8.0
Very good
10,368 reviews

Boarding

8.2

Comfort

7.9

Entertainment

8.0

Overall

8.0

Food

7.4

Crew

8.6

Reviews

1 / 10

When I was going to board, one of the staff members told me that I could not board with my passport bag because it was tree items and I would need to check a bag. This was so stupid ! The bag was small. So I had to put my things in my pockets, put the funny bag inside the other bag. Then go throw it. Then in the plane put everything back again in my funny bag.

Frontier
6.2
Okay
3,985 reviews
Delta
8.0
Very good
10,368 reviews

Boarding

8.2

Comfort

7.9

Entertainment

8.0

Overall

8.0

Food

7.4

Crew

8.6

Reviews

1 / 10

When I was going to board, one of the staff members told me that I could not board with my passport bag because it was tree items and I would need to check a bag. This was so stupid ! The bag was small. So I had to put my things in my pockets, put the funny bag inside the other bag. Then go throw it. Then in the plane put everything back again in my funny bag.

Related info for your journey

Find useful and relevant information for your journey from St. Louis to Portland. 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 St. Louis to Portland, Maine for under $200 on Cheapflights?

    Yes, there are multiple flights from St. Louis to Portland, Maine for under $200. The cheapest flight booked recently is on Frontier for just $196, but on average you can expect to pay $311.

  • Are there last-minute flights available from St. Louis to Portland, Maine for under $300?

    There are currently 20+ open flights from St. Louis to Portland, Maine within the next 7 days for less than $300.

  • What are the cheapest airlines flying from St. Louis to Portland, Maine round-trip?

    According to our current data, Frontier ($196), American Airlines ($286), and Delta ($296) offers the cheapest pricing from St. Louis to Portland, Maine. These flights start at 57% lower than the current average price 3 months from now.

  • What are the cheapest airlines to fly from St. Louis to Portland, Maine one-way?

    $125 is the cheapest one-way deal found within the past few days, from Frontier. You may also be able to find cheap deals on Delta and United Airlines, with prices starting from $136 and $244, respectively.

  • What does STL to PWM mean?

    Lambert-St Louis Airport is STL and Portland Airport is PWM. These codes are created by the International Air Transport Association (IATA) and airlines use them to identify the departing and arrival airports in the flight routes they service.

  • Can I find deals for flights from St. Louis to Portland that include extra baggage allowance?

    The amount of baggage you can bring on your St. Louis to Portland 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 St. Louis to Portland with specific airlines?

    Yes, Cheapflights allows you to browse and filter St. Louis to Portland 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 St. Louis to Portland that include hotel bookings?

    Yes. In addition to deals on St. Louis to Portland flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from St. Louis to Portland?

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

  • Can I find deals for business class flights from St. Louis to Portland?

    Yes. Cheapflights offers flight deals from St. Louis to Portland 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 St. Louis to Portland that allow pets onboard?

    Many airlines flying from St. Louis to Portland 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 St. Louis to Portland?

    Yes, you can often find last-minute deals on St. Louis to Portland 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 St. Louis to Portland, Maine flight deals updated?

    The St. Louis to Portland, Maine flight deals you see on this page were last updated on 6/6.

  • What are the most popular airlines that fly from St. Louis to Portland, Maine?

    Before booking your flight from St. Louis to Portland, Maine check out the most popular airlines for this route: American Airlines, JetBlue or Delta.

  • What is the cheapest month to book a flight from St. Louis to Portland, Maine?

    Currently, January is the cheapest month in which you can book a flight from St. Louis to Portland, Maine (average of $293). Flying from St. Louis to Portland, Maine in April is currently the most expensive (average of $498). 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

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Alternative routes for St. Louis to Portland
See prices for flight routes from nearby airports that may be better suited for you.

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Top 5 airlines flying from St. Louis to Portland

Discover the top 5 airlines that operate flights from St. Louis to Portland. 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 3,050,429 searches. Data last updated June 6, 2024.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$174Average$285FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$331Average$560FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$334Average$482FlexibilityNo cancel feeOn-time71%
DeltaCheapest$335Average$476FlexibilityNo cancel feeOn-timeN/A
JetBlueCheapest$474Average$494FlexibilityNo cancel feeOn-time62%
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Search flights from St. Louis to Portland by cabin class

Find flights from St. Louis to Portland, based on your preferred cabin class, be it economy, premium economy, business, or first class.
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