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Cheap flights from St. Louis to Portland (STL - PWM) from $149

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 9/23. 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
Apr 29 — May 61
From?
To?
Mon 4/29
Mon 5/6
1 adult, Economy
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The best prices from Lambert-St Louis to Portland are usually found in February or January, booked 75 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 April 24, 2024.

Popular in

July

Cheapest in

February

Round-trip from

$293

One-way from

$169
High demand for flights, 14% potential price rise
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Best time to find cheap flights, 21% 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.

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

Users have found that booking a flight from St. Louis to Portland, Maine at least 37 days early can save you up to 79% on average compared to booking a flight this week. If booking 37 days before your flight isn’t an option for you, users have found flights from St. Louis to Portland, Maine for as little as $608 when booking for a departure date within the next two weeks. You can also check prices now. Some users have found airline tickets as low as $754 for flights departing within the next 3 days.

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 July. For low rates, February can be a great choice for travel to Portland, Maine. Flights to Portland, Maine from St. Louis in February are about $460 on average during February, but can be found for as low as $171.

When is the cheapest time to fly from St. Louis to Portland, Maine (STL - 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 42% versus a flight at noon.

Cheap American Airlines flights from St. Louis to Portland

Explore cheap flight options specifically provided by American Airlines for the route between St. Louis and Portland. 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 3,073,952 searches. Data last updated April 24, 2024.
Find some of the cheapest American Airlines flights traveling from St. Louis to Portland. Make sure to double check the flight details before booking.
Wed 9/46:58 pmSTL - PWM
1 stop4h 44mAmerican Airlines
Wed 9/115:13 pmPWM - STL
1 stop7h 07mAmerican Airlines
Deal found 4/23$273
Tue 9/105:37 amSTL - PWM
1 stop4h 47mAmerican Airlines
Tue 9/178:00 amPWM - STL
1 stop4h 50mAmerican Airlines
Deal found 4/24$274
Thu 6/135:15 amSTL - PWM
1 stop5h 59mAmerican Airlines
Wed 6/195:29 pmPWM - STL
1 stop4h 59mAmerican Airlines
Deal found 4/22$305
Sun 8/114:20 pmSTL - PWM
1 stop4h 28mAmerican Airlines
Sat 8/176:07 amPWM - STL
1 stop6h 43mAmerican Airlines
Deal found 4/22$306
Thu 8/226:58 pmSTL - PWM
1 stop4h 34mAmerican Airlines
Fri 8/306:40 amPWM - STL
1 stop8h 16mAmerican Airlines
Deal found 4/23$323
Thu 9/266:58 pmSTL - PWM
1 stop4h 44mAmerican Airlines
Sat 9/288:00 amPWM - STL
1 stop4h 50mAmerican Airlines
Deal found 4/23$324
Sun 6/95:15 amSTL - PWM
1 stop5h 59mAmerican Airlines
Sun 6/166:00 amPWM - STL
1 stop7h 16mAmerican Airlines
Deal found 4/23$334
Mon 9/166:58 pmSTL - PWM
1 stop4h 44mAmerican Airlines
Mon 9/238:00 amPWM - STL
1 stop4h 50mAmerican Airlines
Deal found 4/23$344
Sun 9/155:37 amSTL - PWM
1 stop4h 47mAmerican Airlines
Sun 9/226:48 amPWM - STL
1 stop8h 08mAmerican Airlines
Deal found 4/23$353

Cheap Delta flights from St. Louis to Portland

Explore cheap flight options specifically provided by Delta for the route between St. Louis and Portland. 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 3,073,952 searches. Data last updated April 24, 2024.
To aid your search, here are some of the cheapest Delta flights we've found from St. Louis to Portland. Deals frequently update to provide users with more options.
Wed 9/46:45 amSTL - PWM
1 stop4h 23mDelta
Sat 9/76:05 amPWM - STL
1 stop5h 42mDelta
Deal found 4/23$276
Tue 6/46:12 pmSTL - PWM
1 stop4h 32mDelta
Thu 6/66:05 amPWM - STL
1 stop6h 43mDelta
Deal found 4/24$316
Tue 5/216:12 pmSTL - PWM
1 stop4h 32mDelta
Tue 5/285:00 amPWM - STL
1 stop5h 19mDelta
Deal found 4/23$346
Tue 6/113:10 pmSTL - PWM
1 stop6h 50mDelta
Wed 6/1911:58 amPWM - STL
1 stop10h 57mDelta
Deal found 4/22$420
Tue 6/114:02 pmSTL - PWM
1 stop4h 57mDelta
Wed 6/1911:30 amPWM - STL
2 stops10h 07mDelta
Deal found 4/22$447
Wed 6/123:10 pmSTL - PWM
1 stop6h 50mDelta
Wed 6/196:01 amPWM - STL
2 stops11h 19mDelta
Deal found 4/22$483
Wed 9/43:40 pmSTL - PWM
1 stop6h 27mDelta
Sat 9/75:30 amPWM - STL
2 stops11h 27mDelta
Deal found 4/23$512
Fri 5/172:55 pmSTL - PWM
1 stop6h 55mDelta
Sun 5/195:00 amPWM - STL
1 stop5h 19mDelta
Deal found 4/23$637
Tue 4/306:10 pmSTL - PWM
1 stop4h 34mDelta
Wed 5/15:00 amPWM - STL
1 stop5h 20mDelta
Deal found 4/24$747

Cheap St. Louis to Portland flights in April & May 2024

Find cheap flight options from St. Louis to Portland specifically for the months of April and May 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 3,073,952 searches. Prices were last updated on April 24, 2024.
Check out some of the best flight deals from St. Louis to Portland in 2024. Check back regularly for other flight deals.
Thu 5/27:16 pmSTL - PWM
1 stop15h 44mFrontier
Mon 5/69:11 amPWM - STL
1 stop12h 00mFrontier
Deal found 4/24$188
Mon 5/205:04 pmSTL - PWM
1 stop5h 43mAmerican Airlines
Thu 5/238:45 pmPWM - STL
1 stop5h 21mAmerican Airlines
Deal found 4/24$414
Tue 5/146:16 amSTL - PWM
1 stop4h 32mAmerican Airlines
Fri 5/172:32 pmPWM - STL
1 stop7h 28mAmerican Airlines
Deal found 4/24$472
Wed 5/225:04 amSTL - PWM
1 stop5h 43mAmerican Airlines
Wed 5/296:03 amPWM - STL
1 stop5h 26mAmerican Airlines
Deal found 4/24$565
Tue 5/1410:34 amSTL - PWM
3 stops23h 53mMultiple Airlines
Fri 5/175:54 pmPWM - STL
3 stops23h 31mMultiple Airlines
Deal found 4/24$611
Wed 5/226:30 amSTL - PWM
1 stop6h 44mUnited Airlines
Wed 5/295:30 amPWM - STL
2 stops11h 11mUnited Airlines
Deal found 4/24$636
Fri 5/172:55 pmSTL - PWM
1 stop6h 55mDelta
Sun 5/195:00 amPWM - STL
1 stop5h 19mDelta
Deal found 4/23$637
Mon 5/205:25 pmSTL - PWM
2 stops16h 19mUnited Airlines
Thu 5/233:50 pmPWM - STL
1 stop6h 54mUnited Airlines
Deal found 4/24$648
Tue 5/144:51 pmSTL - PWM
2 stops16h 53mUnited Airlines
Fri 5/176:30 pmPWM - STL
2 stops16h 28mUnited Airlines
Deal found 4/24$662

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 3,073,952 searches. Data last updated April 24, 2024.
Check out some of the best flight deals from St. Louis to Portland in 2024. Check back regularly for other flight deals.
Mon 9/239:20 pmSTL - PWM
1 stop10h 42mFrontier
Thu 9/2611:46 amPWM - STL
1 stop20h 16mFrontier
Deal found 4/23$149
Mon 9/239:20 pmSTL - PWM
1 stop10h 42mFrontier
Thu 9/2611:46 amPWM - STL
1 stop20h 16mFrontier
Deal found 4/24$150
Thu 5/27:16 pmSTL - PWM
1 stop15h 44mFrontier
Mon 5/69:11 amPWM - STL
1 stop12h 00mFrontier
Deal found 4/24$188
Wed 9/46:58 pmSTL - PWM
1 stop4h 44mAmerican Airlines
Wed 9/115:13 pmPWM - STL
1 stop7h 07mAmerican Airlines
Deal found 4/23$273
Tue 9/105:37 amSTL - PWM
1 stop4h 47mAmerican Airlines
Tue 9/178:00 amPWM - STL
1 stop4h 50mAmerican Airlines
Deal found 4/24$274
Wed 9/46:45 amSTL - PWM
1 stop4h 23mDelta
Sat 9/76:05 amPWM - STL
1 stop5h 42mDelta
Deal found 4/23$276
Tue 6/46:12 pmSTL - PWM
1 stop4h 32mDelta
Thu 6/66:05 amPWM - STL
1 stop6h 43mDelta
Deal found 4/24$316
Thu 8/226:58 pmSTL - PWM
1 stop4h 34mAmerican Airlines
Fri 8/305:13 pmPWM - STL
1 stop4h 54mAmerican Airlines
Deal found 4/24$323
Tue 7/305:17 amSTL - PWM
1 stop5h 57mAmerican Airlines
Wed 8/76:07 amPWM - STL
1 stop6h 43mAmerican Airlines
Deal found 4/24$325

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 3,073,952 searches. Data last updated April 24, 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.
Thu 5/27:16 pmSTL - PWM
1 stop15h 44mFrontier
Mon 5/69:11 amPWM - STL
1 stop12h 00mFrontier
Deal found 4/24$188
Tue 4/306:10 pmSTL - PWM
1 stop4h 34mDelta
Wed 5/15:00 amPWM - STL
1 stop5h 20mDelta
Deal found 4/24$747
Thu 5/26:30 amSTL - PWM
1 stop6h 43mUnited Airlines
Mon 5/66:05 amPWM - STL
2 stops10h 41mUnited Airlines
Deal found 4/24$884
Tue 4/308:46 amSTL - PWM
2 stops12h 33mAmerican Airlines
Wed 5/15:20 pmPWM - STL
1 stop4h 56mAmerican Airlines
Deal found 4/24$985
Thu 5/21:10 pmSTL - PWM
2 stops9h 44mAmerican Airlines
Mon 5/66:03 amPWM - STL
2 stops13h 05mAmerican Airlines
Deal found 4/24$1,066
Tue 4/301:10 pmSTL - PWM
2 stops9h 44mAmerican Airlines
Wed 5/15:43 amPWM - STL
2 stops11h 00mAmerican Airlines
Deal found 4/24$1,236

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 3,073,952 searches. Data last updated April 24, 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.
Thu 5/237:30 pmSTL - PWM
1 stop12h 39mMultiple Airlines
Deal found 4/23$169
Sun 6/26:19 pmSTL - PWM
2 stops18h 07mMultiple Airlines
Deal found 4/24$199
Thu 6/68:12 pmSTL - PWM
1 stop12h 57mMultiple Airlines
Deal found 4/23$218
Thu 5/236:19 pmSTL - PWM
2 stops13h 50mMultiple Airlines
Deal found 4/23$222
Sun 6/27:30 pmSTL - PWM
3 stops22h 29mMultiple Airlines
Deal found 4/24$224
Thu 6/68:12 pmSTL - PWM
2 stops20h 01mMultiple Airlines
Deal found 4/23$253
Thu 6/67:45 amSTL - PWM
3 stops25h 24mMultiple Airlines
Deal found 4/23$274
Thu 5/237:45 amSTL - PWM
3 stops24h 24mMultiple Airlines
Deal found 4/23$294
Sun 6/25:04 pmSTL - PWM
1 stop5h 43mAmerican Airlines
Deal found 4/24$328

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 3,073,952 searches. Data last updated April 24, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$149 - $446

Route

Depart

Return

Price

Lambert-St LouisPortland

STL - PWM

STLPWM

Lambert-St Louis

Mon 9/23

1 stop10h 42m

Portland

Thu 9/26

1 stop20h 16m

$149

Lambert-St LouisPortland

STL - PWM

STLPWM

Lambert-St Louis

Mon 9/23

1 stop10h 42m

Portland

Thu 9/26

1 stop20h 16m

$150

Lambert-St LouisPortland

STL - PWM

STLPWM

Lambert-St Louis

Wed 9/4

1 stop4h 44m

Portland

Wed 9/11

1 stop7h 07m

$273

Lambert-St LouisPortland

STL - PWM

STLPWM

Lambert-St Louis

Tue 9/10

1 stop4h 47m

Portland

Tue 9/17

1 stop4h 50m

$274

Lambert-St LouisPortland

STL - PWM

STLPWM

Lambert-St Louis

Wed 9/4

1 stop4h 23m

Portland

Sat 9/7

1 stop5h 42m

$276

Lambert-St LouisPortland

STL - PWM

STLPWM

Lambert-St Louis

Thu 6/13

1 stop5h 59m

Portland

Wed 6/19

1 stop4h 59m

$305

Lambert-St LouisPortland

STL - PWM

STLPWM

Lambert-St Louis

Tue 6/4

1 stop4h 32m

Portland

Thu 6/6

1 stop6h 43m

$316

Lambert-St LouisPortland

STL - PWM

STLPWM

Lambert-St Louis

Sun 6/9

1 stop14h 14m

Portland

Sun 6/16

3 stops23h 51m

$429

Lambert-St LouisPortland

STL - PWM

STLPWM

Lambert-St Louis

Wed 9/4

2 stops13h 29m

Portland

Wed 9/11

1 stop8h 01m

$446

Flights are sorted by cheapest first

Deals found on 4/23

When is the best time to 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 January 28, 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 75 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.
Search Deals

When is the cheapest time 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 April 21, 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

Average price of flights to Portland by month

Plan your trip from St. Louis to Portland by taking into account the cheapest months to travel. The average price of a one-way flight from St. Louis to Portland is currently $242 while a round-trip flight costs $291. Price data was last updated on April 21, 2024.

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 $497). 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.

January

$293

February

$332

March

$414

April

$497

May

$431

June

$413

July

$448

August

$360

September

$340

October

$323

November

$333

December

$333

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

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 April 24, 2024.
Read reviews from past customers who have flown American Airlines, Delta and United Airlines 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
8.1
Very good
11,004 reviews
Check prices

Food

7.5

Overall

8.1

Crew

8.6

Boarding

8.2

Comfort

7.9

Entertainment

8.0

Reviews

1 / 10

Terrible flight crew that skipped our row for service multiple times.

Delta
8.1
Very good
11,004 reviews
Delta
8.1
Very good
11,004 reviews
Check prices

Food

7.5

Overall

8.1

Crew

8.6

Boarding

8.2

Comfort

7.9

Entertainment

8.0

Reviews

1 / 10

Terrible flight crew that skipped our row for service multiple times.

United Airlines
7.4
Good
11,255 reviews
Delta
8.1
Very good
11,004 reviews
Check prices

Food

7.5

Overall

8.1

Crew

8.6

Boarding

8.2

Comfort

7.9

Entertainment

8.0

Reviews

1 / 10

Terrible flight crew that skipped our row for service multiple times.

American Airlines
7.3
Good
14,898 reviews
Delta
8.1
Very good
11,004 reviews
Check prices

Food

7.5

Overall

8.1

Crew

8.6

Boarding

8.2

Comfort

7.9

Entertainment

8.0

Reviews

1 / 10

Terrible flight crew that skipped our row for service multiple times.

Frontier
6.3
Okay
4,135 reviews
Delta
8.1
Very good
11,004 reviews
Check prices

Food

7.5

Overall

8.1

Crew

8.6

Boarding

8.2

Comfort

7.9

Entertainment

8.0

Reviews

1 / 10

Terrible flight crew that skipped our row for service multiple times.

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 $149, but on average you can expect to pay $317.

  • Are there last-minute flights available from St. Louis to Portland, Maine for under $200?

    There are currently 6+ open flights from St. Louis to Portland, Maine within the next 7 days for less than $200.

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

    According to our current data, Frontier ($149), American Airlines ($273), and Delta ($276) offers the cheapest pricing from St. Louis to Portland, Maine. These flights start at 67% lower than the current average price 3 months from now.

  • 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 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 4/24.

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 3,073,952 searches. Data last updated April 24, 2024.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$169Average$285FlexibilityNo cancel feeOn-time62%
Search Frontier flights
United AirlinesCheapest$331Average$560FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
DeltaCheapest$335Average$476FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
American AirlinesCheapest$345Average$484FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
JetBlueCheapest$464Average$494FlexibilityNo cancel feeOn-time62%
Search JetBlue flights
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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.
First Class
Business Class
Prem Econ Class
Economy Class

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Fly with Cheapflights

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How does Cheapflights help users find flights from St. Louis to Portland?

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Why should you use Cheapflights to find cheap flight tickets from St. Louis to Portland?

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Users can book flights with no change fees policies with our dedicated filters. Book flights from St. Louis to Portland flexibly with Cheapflights today.

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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.
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