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Cheap flights from St. Louis to Portland (STL - PWM) from $100

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 6/12. 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
May 5 — May 121
From?
To?
Sun 5/5
Sun 5/12
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 30, 2024.

Popular in

July

Cheapest in

February

Round-trip from

$293

One-way from

$100
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 Wednesday 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 2,913,887 searches. Data last updated April 30, 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 10/167:37 amSTL - PWM
1 stop6h 35mAmerican Airlines
Wed 10/235:13 pmPWM - STL
1 stop7h 07mAmerican Airlines
Deal found 4/30$283
Mon 9/166:58 pmSTL - PWM
1 stop4h 44mAmerican Airlines
Mon 9/238:00 amPWM - STL
1 stop4h 50mAmerican Airlines
Deal found 4/29$314
Wed 5/294:20 pmSTL - PWM
1 stop5h 24mAmerican Airlines
Wed 6/55:50 amPWM - STL
1 stop5h 35mAmerican Airlines
Deal found 4/29$324
Tue 7/95:46 pmSTL - PWM
1 stop5h 00mAmerican Airlines
Sat 7/135:31 amPWM - STL
1 stop5h 59mAmerican Airlines
Deal found 4/28$325
Thu 7/115:46 pmSTL - PWM
1 stop5h 00mAmerican Airlines
Sat 7/2011:40 amPWM - STL
1 stop6h 59mAmerican Airlines
Deal found 4/29$334
Sat 7/135:46 pmSTL - PWM
1 stop5h 00mAmerican Airlines
Tue 7/2312:31 pmPWM - STL
1 stop9h 58mAmerican Airlines
Deal found 4/30$344
Sat 7/133:18 pmSTL - PWM
1 stop7h 28mAmerican Airlines
Tue 7/235:26 pmPWM - STL
1 stop5h 03mAmerican Airlines
Deal found 4/29$354
Tue 8/135:30 amSTL - PWM
1 stop5h 39mAmerican Airlines
Sun 8/188:02 amPWM - STL
1 stop5h 15mAmerican Airlines
Deal found 4/30$364
Fri 10/186:28 pmSTL - PWM
1 stop4h 10mAmerican Airlines
Mon 10/215:40 pmPWM - STL
1 stop15h 32mAmerican Airlines
Deal found 4/29$365

Cheap United Airlines flights from St. Louis to Portland

Explore cheap flight options specifically provided by United 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 2,913,887 searches. Data last updated April 30, 2024.
To aid your search, here are some of the cheapest United Airlines flights we've found from St. Louis to Portland. Deals frequently update to provide users with more options.
Wed 10/1611:09 amSTL - PWM
2 stops11h 50mUnited Airlines
Wed 10/235:00 pmPWM - STL
1 stop7h 00mUnited Airlines
Deal found 4/30$466
Thu 8/229:30 amSTL - PWM
2 stops13h 29mUnited Airlines
Fri 8/306:00 amPWM - STL
1 stop5h 07mUnited Airlines
Deal found 4/29$511
Mon 9/165:20 pmSTL - PWM
2 stops29h 39mUnited Airlines
Mon 9/233:55 pmPWM - STL
1 stop8h 01mUnited Airlines
Deal found 4/29$547
Wed 5/296:08 amSTL - PWM
1 stop6h 43mUnited Airlines
Wed 6/55:30 amPWM - STL
2 stops11h 11mUnited Airlines
Deal found 4/29$560
Wed 5/298:05 amSTL - PWM
2 stops14h 53mUnited Airlines
Wed 6/55:30 amPWM - STL
2 stops11h 11mUnited Airlines
Deal found 4/29$565
Sat 5/255:31 pmSTL - PWM
2 stops20h 14mUnited Airlines
Sat 6/16:00 amPWM - STL
1 stop10h 41mUnited Airlines
Deal found 4/29$578
Tue 7/95:30 pmSTL - PWM
2 stops19h 21mUnited Airlines
Sat 7/133:50 pmPWM - STL
1 stop7h 55mUnited Airlines
Deal found 4/28$603
Thu 8/229:30 amSTL - PWM
2 stops13h 29mUnited Airlines
Fri 8/307:25 pmPWM - STL
2 stops21h 24mUnited Airlines
Deal found 4/29$620
Tue 5/288:05 amSTL - PWM
2 stops12h 01mUnited Airlines
Tue 6/46:00 amPWM - STL
1 stop10h 41mUnited Airlines
Deal found 4/30$622

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 2,913,887 searches. Prices were last updated on April 30, 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 4/29$318
Sat 5/43:36 pmSTL - PWM
1 stop16h 00mFrontier
Mon 5/69:11 amPWM - STL
1 stop12h 00mFrontier
Deal found 4/30$321
Wed 5/294:20 pmSTL - PWM
1 stop5h 24mAmerican Airlines
Wed 6/55:50 amPWM - STL
1 stop5h 35mAmerican Airlines
Deal found 4/29$324
Thu 5/167:30 pmSTL - PWM
1 stop13h 39mMultiple Airlines
Mon 5/2010:50 amPWM - STL
2 stops23h 49mMultiple Airlines
Deal found 4/29$336
Mon 5/209:26 pmSTL - PWM
1 stop10h 43mFrontier
Thu 5/2311:40 amPWM - STL
1 stop20h 28mFrontier
Deal found 4/30$338
Thu 5/167:30 pmSTL - PWM
2 stops20h 43mMultiple Airlines
Mon 5/2010:50 amPWM - STL
2 stops23h 49mMultiple Airlines
Deal found 4/29$339
Tue 5/282:59 pmSTL - PWM
1 stop6h 51mDelta
Sat 6/17:00 amPWM - STL
1 stop5h 39mDelta
Deal found 4/29$346
Tue 5/282:59 pmSTL - PWM
1 stop6h 51mDelta
Tue 6/46:05 amPWM - STL
1 stop6h 43mDelta
Deal found 4/30$356
Sat 5/254:20 pmSTL - PWM
1 stop5h 24mAmerican Airlines
Sat 6/16:03 amPWM - STL
1 stop5h 27mAmerican Airlines
Deal found 4/30$374

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 2,913,887 searches. Data last updated April 30, 2024.
Check out some of the best flight deals from St. Louis to Portland in 2024. Check back regularly for other flight deals.
Wed 10/167:37 amSTL - PWM
1 stop6h 35mAmerican Airlines
Wed 10/235:13 pmPWM - STL
1 stop7h 07mAmerican Airlines
Deal found 4/30$283
Mon 9/166:58 pmSTL - PWM
1 stop4h 44mAmerican Airlines
Mon 9/238:00 amPWM - STL
1 stop4h 50mAmerican Airlines
Deal found 4/29$314
Tue 6/46:12 pmSTL - PWM
1 stop4h 32mDelta
Thu 6/65:00 amPWM - STL
1 stop5h 19mDelta
Deal found 4/29$316
Thu 5/27:16 pmSTL - PWM
1 stop15h 44mFrontier
Mon 5/69:11 amPWM - STL
1 stop12h 00mFrontier
Deal found 4/29$318
Sat 5/43:36 pmSTL - PWM
1 stop16h 00mFrontier
Mon 5/69:11 amPWM - STL
1 stop12h 00mFrontier
Deal found 4/30$321
Wed 5/294:20 pmSTL - PWM
1 stop5h 24mAmerican Airlines
Wed 6/55:50 amPWM - STL
1 stop5h 35mAmerican Airlines
Deal found 4/29$324
Tue 7/95:46 pmSTL - PWM
1 stop5h 00mAmerican Airlines
Sat 7/135:31 amPWM - STL
1 stop5h 59mAmerican Airlines
Deal found 4/28$325
Tue 6/46:12 pmSTL - PWM
1 stop4h 32mDelta
Thu 6/66:27 amPWM - STL
1 stop6h 49mDelta
Deal found 4/30$326
Thu 7/115:46 pmSTL - PWM
1 stop5h 00mAmerican Airlines
Sat 7/2011:40 amPWM - STL
1 stop6h 59mAmerican Airlines
Deal found 4/29$334

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 2,913,887 searches. Data last updated April 30, 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.
Fri 5/104:20 pmSTL - PWM
1 stop5h 24mAmerican Airlines
Sun 5/1212:21 pmPWM - STL
1 stop8h 09mAmerican Airlines
Deal found 4/30$651
Fri 5/106:30 amSTL - PWM
1 stop7h 13mUnited Airlines
Sun 5/126:05 amPWM - STL
2 stops16h 44mUnited Airlines
Deal found 4/30$740
Fri 5/105:25 pmSTL - PWM
2 stops16h 21mUnited Airlines
Sun 5/126:05 amPWM - STL
2 stops12h 09mUnited Airlines
Deal found 4/30$911

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 2,913,887 searches. Data last updated April 30, 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.
Wed 6/128:18 amSTL - PWM
1 stop23h 56mFrontier
Deal found 4/30$100
Sun 6/27:30 pmSTL - PWM
1 stop13h 39mMultiple Airlines
Deal found 4/29$122
Thu 5/307:30 pmSTL - PWM
1 stop13h 39mMultiple Airlines
Deal found 4/30$148
Thu 5/306:19 pmSTL - PWM
2 stops18h 07mMultiple Airlines
Deal found 4/30$174
Thu 5/307:30 pmSTL - PWM
3 stops22h 29mMultiple Airlines
Deal found 4/30$192
Sun 6/27:30 amSTL - PWM
3 stops25h 39mMultiple Airlines
Deal found 4/29$211
Wed 6/121:55 pmSTL - PWM
2 stops21h 46mMultiple Airlines
Deal found 4/30$233
Wed 6/1212:15 pmSTL - PWM
3 stops23h 26mMultiple Airlines
Deal found 4/30$258

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 2,913,887 searches. Data last updated April 30, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$283 - $466

Route

Depart

Return

Price

Lambert-St LouisPortland

STL - PWM

STLPWM

Lambert-St Louis

Wed 10/16

1 stop6h 35m

Portland

Wed 10/23

1 stop7h 07m

$283

Lambert-St LouisPortland

STL - PWM

STLPWM

Lambert-St Louis

Mon 9/16

1 stop4h 44m

Portland

Mon 9/23

1 stop4h 50m

$314

Lambert-St LouisPortland

STL - PWM

STLPWM

Lambert-St Louis

Tue 6/4

1 stop4h 32m

Portland

Thu 6/6

1 stop5h 19m

$316

Lambert-St LouisPortland

STL - PWM

STLPWM

Lambert-St Louis

Wed 5/29

1 stop5h 24m

Portland

Wed 6/5

1 stop5h 35m

$324

Lambert-St LouisPortland

STL - PWM

STLPWM

Lambert-St Louis

Tue 6/4

1 stop4h 32m

Portland

Thu 6/6

1 stop6h 49m

$326

Lambert-St LouisPortland

STL - PWM

STLPWM

Lambert-St Louis

Thu 5/16

1 stop13h 39m

Portland

Mon 5/20

2 stops23h 49m

$336

Lambert-St LouisPortland

STL - PWM

STLPWM

Lambert-St Louis

Mon 5/20

1 stop10h 43m

Portland

Thu 5/23

1 stop20h 28m

$338

Lambert-St LouisPortland

STL - PWM

STLPWM

Lambert-St Louis

Thu 5/16

2 stops20h 43m

Portland

Mon 5/20

2 stops23h 49m

$339

Lambert-St LouisPortland

STL - PWM

STLPWM

Lambert-St Louis

Wed 10/16

2 stops11h 50m

Portland

Wed 10/23

1 stop7h 00m

$466

Flights are sorted by cheapest first

Deals found on 4/30

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 28, 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 $180 while a round-trip flight costs $338. Price data was last updated on April 28, 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 $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.

January

$293

February

$332

March

$414

April

$498

May

$439

June

$410

July

$448

August

$364

September

$341

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 30, 2024.
Read reviews from past customers who have flown American Airlines, United Airlines 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
8.1
Very good
10,896 reviews
Check prices

Entertainment

8.0

Food

7.4

Crew

8.6

Overall

8.1

Boarding

8.2

Comfort

7.9

Reviews

1 / 10

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

Delta
8.1
Very good
10,896 reviews
Delta
8.1
Very good
10,896 reviews
Check prices

Entertainment

8.0

Food

7.4

Crew

8.6

Overall

8.1

Boarding

8.2

Comfort

7.9

Reviews

1 / 10

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

United Airlines
7.4
Good
11,186 reviews
Delta
8.1
Very good
10,896 reviews
Check prices

Entertainment

8.0

Food

7.4

Crew

8.6

Overall

8.1

Boarding

8.2

Comfort

7.9

Reviews

1 / 10

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

American Airlines
7.3
Good
14,814 reviews
Delta
8.1
Very good
10,896 reviews
Check prices

Entertainment

8.0

Food

7.4

Crew

8.6

Overall

8.1

Boarding

8.2

Comfort

7.9

Reviews

1 / 10

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

Frontier
6.3
Okay
4,123 reviews
Delta
8.1
Very good
10,896 reviews
Check prices

Entertainment

8.0

Food

7.4

Crew

8.6

Overall

8.1

Boarding

8.2

Comfort

7.9

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 $300 on Cheapflights?

    Yes, there are multiple flights from St. Louis to Portland, Maine for under $300. The cheapest flight booked recently is on American Airlines for just $283, but on average you can expect to pay $344.

  • Are there last-minute flights available from St. Louis to Portland, Maine for under $700?

    There are currently 3+ open flights from St. Louis to Portland, Maine within the next 7 days for less than $700.

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

    According to our current data, American Airlines ($283), Delta ($316), and Frontier ($338) offers the cheapest pricing from St. Louis to Portland, Maine. These flights start at 38% 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 4/30.

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 2,913,887 searches. Data last updated April 30, 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$480FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
American AirlinesCheapest$343Average$483FlexibilityNo 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.
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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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Of course! You can now track prices for flights from St. Louis to Portland and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

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