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Cheap flights from Portland to St. Louis (PWM - STL) from $148

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 9/26. 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.
PWM — STL
Apr 30 — May 71
From?
To?
Tue 4/30
Tue 5/7
1 adult, Economy
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The best prices from Portland to Lambert-St Louis are usually found in March or January, booked 47 days in advance, depart on a Wednesday or Thursday and return on a Wednesday

Cheap flight deals from Portland to St. Louis

Discover tips and strategies to find the most affordable flight options for your journey from Portland (PWM) to St. Louis (STL). 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 25, 2024.

Popular in

December

Cheapest in

March

Average price

$549

Round-trip from

$323
High demand for flights, 23% potential price rise
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Best time to find cheap flights, 23% potential price drop
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Average for round-trip flights in April 2024
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From Portland to Lambert-St Louis
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What is the cheapest day to fly round-trip from Portland, Maine to St. Louis?

Departing on a Tuesday is a good option for securing a great price. You can expect to save up to 56% when planning your travel around this day of the week.

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

To save up to 189% on this flight, we recommend booking at least 48 days prior to travel. The price may fluctuate and will likely increase closer to your departure date. Users on Cheapflights have found tickets from Portland, Maine to St. Louis from $565 1-2 weeks out and tickets from $700 for flights departing within the next 72 hours.

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

Due to multiple factors, expect to potentially pay more when booking in December. For low rates, March can be a great choice for travel to St. Louis. Flights to St. Louis from Portland, Maine in March are about $472 on average during March, but can be found for as low as $314.

When is the cheapest time to fly from Portland, Maine to St. Louis (PWM - STL)?

When flying from Portland, Maine to St. Louis, the time of day you fly usually plays a role in the price. Save by searching for a flight at noon, which can drop the price by up to 8% versus a flight in the morning.

Cheap Delta flights from Portland to St. Louis

Explore cheap flight options specifically provided by Delta for the route between Portland and St. Louis. 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 3,068,701 searches. Data last updated April 25, 2024.
Check out some of the cheapest Delta flights we've come across from Portland to St. Louis. Come back soon if you're not finding the exact deal you're looking for.
Tue 6/116:01 amPWM - STL
1 stop7h 18mDelta
Fri 6/144:02 pmSTL - PWM
1 stop4h 57mDelta
Deal found 4/25$307
Wed 8/213:15 pmPWM - STL
1 stop6h 51mDelta
Sat 8/245:05 pmSTL - PWM
1 stop5h 34mDelta
Deal found 4/23$346
Thu 5/236:27 amPWM - STL
1 stop6h 49mDelta
Sun 5/265:29 pmSTL - PWM
1 stop5h 15mDelta
Deal found 4/24$347
Sun 5/195:00 amPWM - STL
1 stop5h 19mDelta
Sun 5/265:29 pmSTL - PWM
1 stop5h 15mDelta
Deal found 4/25$387
Wed 8/216:30 amPWM - STL
1 stop5h 43mDelta
Sat 8/245:30 pmSTL - PWM
2 stops20h 49mDelta
Deal found 4/24$396
Sat 5/255:00 amPWM - STL
1 stop5h 19mDelta
Sat 6/112:53 pmSTL - PWM
1 stop8h 06mDelta
Deal found 4/25$416
Mon 5/206:27 amPWM - STL
1 stop6h 49mDelta
Mon 5/272:59 pmSTL - PWM
1 stop6h 51mDelta
Deal found 4/24$556
Sat 5/255:00 amPWM - STL
2 stops10h 15mDelta
Tue 5/2810:20 amSTL - PWM
2 stops11h 30mDelta
Deal found 4/24$1,152
Mon 5/206:27 amPWM - STL
2 stops10h 30mDelta
Mon 5/276:00 amSTL - PWM
2 stops10h 00mDelta
Deal found 4/24$1,349

Cheap American Airlines flights from Portland to St. Louis

Explore cheap flight options specifically provided by American Airlines for the route between Portland and St. Louis. 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 3,068,701 searches. Data last updated April 25, 2024.
Some of the best deals we've found on American Airlines flights traveling from Portland to St. Louis. Check back soon if you're not seeing flights that suit your needs.
Mon 7/17:42 amPWM - STL
1 stop7h 34mAmerican Airlines
Wed 7/105:46 pmSTL - PWM
1 stop5h 00mAmerican Airlines
Deal found 4/24$275
Thu 9/265:13 pmPWM - STL
1 stop7h 07mAmerican Airlines
Sun 9/296:58 pmSTL - PWM
1 stop4h 44mAmerican Airlines
Deal found 4/25$323
Tue 7/96:00 amPWM - STL
1 stop7h 27mAmerican Airlines
Fri 7/125:46 pmSTL - PWM
1 stop5h 00mAmerican Airlines
Deal found 4/25$374
Fri 7/126:00 amPWM - STL
1 stop5h 30mAmerican Airlines
Sat 7/133:17 pmSTL - PWM
1 stop7h 29mAmerican Airlines
Deal found 4/25$394
Wed 5/296:03 amPWM - STL
1 stop5h 26mAmerican Airlines
Sun 6/25:04 pmSTL - PWM
1 stop5h 43mAmerican Airlines
Deal found 4/24$506
Sat 5/256:03 amPWM - STL
2 stops10h 25mAmerican Airlines
Tue 5/285:04 pmSTL - PWM
1 stop5h 43mAmerican Airlines
Deal found 4/24$547
Sat 5/256:03 amPWM - STL
2 stops10h 25mAmerican Airlines
Sat 6/16:40 amSTL - PWM
1 stop15h 01mAmerican Airlines
Deal found 4/25$567
Thu 9/265:29 pmPWM - STL
2 stops6h 51mAmerican Airlines
Sun 9/296:58 pmSTL - PWM
1 stop4h 44mAmerican Airlines
Deal found 4/25$623
Wed 5/296:03 amPWM - STL
2 stops13h 05mAmerican Airlines
Sun 6/25:04 pmSTL - PWM
1 stop5h 43mAmerican Airlines
Deal found 4/24$690

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

Find cheap flight options from Portland to St. Louis specifically for the months of April and May 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 3,068,701 searches. Prices were last updated on April 25, 2024.
Check out some of the best flight deals from Portland to St. Louis in 2024. More deals are always being added, so be sure to check back regularly.
Thu 5/2311:42 amPWM - STL
1 stop6h 34mDelta
Sun 5/265:29 pmSTL - PWM
1 stop5h 15mDelta
Deal found 4/25$327
Wed 5/156:27 amPWM - STL
1 stop6h 49mDelta
Tue 5/212:55 pmSTL - PWM
1 stop6h 55mDelta
Deal found 4/24$346
Thu 5/236:27 amPWM - STL
1 stop6h 49mDelta
Sun 5/265:29 pmSTL - PWM
1 stop5h 15mDelta
Deal found 4/24$347
Sun 5/195:00 amPWM - STL
1 stop5h 19mDelta
Sun 5/265:29 pmSTL - PWM
1 stop5h 15mDelta
Deal found 4/25$387
Sat 5/185:00 amPWM - STL
1 stop5h 19mDelta
Sat 5/255:29 pmSTL - PWM
1 stop5h 15mDelta
Deal found 4/25$416
Wed 5/1512:08 pmPWM - STL
3 stops31h 32mMultiple Airlines
Tue 5/2110:34 amSTL - PWM
3 stops23h 53mMultiple Airlines
Deal found 4/24$498
Thu 5/233:50 pmPWM - STL
1 stop6h 54mUnited Airlines
Sun 5/265:31 pmSTL - PWM
2 stops16h 01mUnited Airlines
Deal found 4/25$501
Wed 5/297:45 amPWM - STL
1 stop6h 25mAmerican Airlines
Sun 6/25:04 pmSTL - PWM
1 stop5h 43mAmerican Airlines
Deal found 4/25$504
Fri 5/243:50 pmPWM - STL
1 stop6h 54mUnited Airlines
Sun 5/265:31 pmSTL - PWM
2 stops16h 01mUnited Airlines
Deal found 4/24$505

Portland to St. Louis 2024 flight deals

Discover exclusive flight deals for travel between Portland and St. Louis in 2024. Find excellent offers based on user searches. Over the last 7 days, Cheapflights users made 3,068,701 searches. Data last updated April 25, 2024.
Check out some of the best flight deals from Portland to St. Louis in 2024. More deals are always being added, so be sure to check back regularly.
Thu 9/2611:46 amPWM - STL
1 stop20h 16mFrontier
Mon 9/309:20 pmSTL - PWM
1 stop10h 42mFrontier
Deal found 4/25$148
Mon 7/17:42 amPWM - STL
1 stop7h 34mAmerican Airlines
Wed 7/105:46 pmSTL - PWM
1 stop5h 00mAmerican Airlines
Deal found 4/24$275
Thu 6/271:27 pmPWM - STL
1 stop24h 13mSun Country Air
Sun 6/305:45 pmSTL - PWM
1 stop17h 26mSun Country Air
Deal found 4/24$305
Tue 6/116:01 amPWM - STL
1 stop7h 18mDelta
Fri 6/143:10 pmSTL - PWM
1 stop6h 50mDelta
Deal found 4/24$307
Thu 9/265:13 pmPWM - STL
1 stop7h 07mAmerican Airlines
Sun 9/296:58 pmSTL - PWM
1 stop4h 44mAmerican Airlines
Deal found 4/25$323
Thu 5/2311:42 amPWM - STL
1 stop6h 34mDelta
Sun 5/265:29 pmSTL - PWM
1 stop5h 15mDelta
Deal found 4/25$327
Wed 8/213:15 pmPWM - STL
1 stop6h 51mDelta
Sat 8/245:05 pmSTL - PWM
1 stop5h 34mDelta
Deal found 4/23$346
Thu 5/236:27 amPWM - STL
1 stop6h 49mDelta
Sun 5/265:29 pmSTL - PWM
1 stop5h 15mDelta
Deal found 4/24$347
Fri 11/811:20 amPWM - STL
1 stop8h 23mAmerican Airlines
Mon 11/116:32 amSTL - PWM
1 stop16h 14mAmerican Airlines
Deal found 4/25$361

One-way flights to St. Louis from Portland

Search for one-way flight options from Portland to St. Louis. 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 3,068,701 searches. Data last updated April 25, 2024.
Take a look at some of the best available options we've come across on one-way flights from Portland to St. Louis. Those seeking round-trip flights from Portland to St. Louis should utilize the search form at the the top of the page.
Thu 9/195:13 pmPWM - STL
1 stop7h 07mAmerican Airlines
Deal found 4/25$157
Sat 6/2211:30 amPWM - STL
1 stop6h 50mDelta
Deal found 4/25$168
Sun 5/195:00 amPWM - STL
1 stop5h 19mDelta
Deal found 4/25$248
Sun 6/236:00 amPWM - STL
1 stop7h 16mAmerican Airlines
Deal found 4/25$278
Sat 8/106:07 amPWM - STL
1 stop15h 04mAmerican Airlines
Deal found 4/24$279
Sun 7/71:27 pmPWM - STL
3 stops23h 38mMultiple Airlines
Deal found 4/24$297
Sun 7/71:27 pmPWM - STL
2 stops25h 24mMultiple Airlines
Deal found 4/24$320
Sat 7/67:00 amPWM - STL
2 stops15h 17mDelta
Deal found 4/24$333
Sat 6/221:30 pmPWM - STL
3 stops28h 30mMultiple Airlines
Deal found 4/25$336

Find flights from Portland to St. Louis within your budget

Customize your flight search to find flights from Portland to St. Louis 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 3,068,701 searches. Data last updated April 25, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$148 - $505

Route

Depart

Return

Price

PortlandLambert-St Louis

PWM - STL

PWMSTL

Portland

Thu 9/26

1 stop20h 16m

Lambert-St Louis

Mon 9/30

1 stop10h 42m

$148

PortlandLambert-St Louis

PWM - STL

PWMSTL

Portland

Mon 7/1

1 stop7h 34m

Lambert-St Louis

Wed 7/10

1 stop5h 00m

$275

PortlandLambert-St Louis

PWM - STL

PWMSTL

Portland

Thu 6/27

1 stop24h 13m

Lambert-St Louis

Sun 6/30

1 stop17h 26m

$305

PortlandLambert-St Louis

PWM - STL

PWMSTL

Portland

Tue 6/11

1 stop7h 18m

Lambert-St Louis

Fri 6/14

1 stop4h 57m

$307

PortlandLambert-St Louis

PWM - STL

PWMSTL

Portland

Thu 9/26

1 stop7h 07m

Lambert-St Louis

Sun 9/29

1 stop4h 44m

$323

PortlandLambert-St Louis

PWM - STL

PWMSTL

Portland

Wed 8/21

1 stop6h 51m

Lambert-St Louis

Sat 8/24

1 stop5h 34m

$346

PortlandLambert-St Louis

PWM - STL

PWMSTL

Portland

Thu 5/23

1 stop6h 49m

Lambert-St Louis

Sun 5/26

1 stop5h 15m

$347

PortlandLambert-St Louis

PWM - STL

PWMSTL

Portland

Wed 5/15

3 stops31h 32m

Lambert-St Louis

Tue 5/21

3 stops23h 53m

$498

PortlandLambert-St Louis

PWM - STL

PWMSTL

Portland

Fri 5/24

1 stop6h 54m

Lambert-St Louis

Sun 5/26

2 stops16h 01m

$505

Flights are sorted by cheapest first

Deals found on 4/25

When is the best time to book a flight from Portland, Maine to St. Louis?

Use this chart to determine the optimal time to book a round-trip flight from Portland to St. Louis. Price data was last updated on January 28, 2024.
The price you pay for your flight from Portland, Maine to St. Louis may vary depending on when you book. For the best chance of a lower fare, look to book 47 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 Portland, Maine to St. Louis?

Use this chart to determine the cheapest time to fly round-trip from Portland to St. Louis. Price data was last updated on April 21, 2024.
Morning
Noon
Afternoon
Evening
All times are departure.
Travelers seeking maximum savings on their Portland, Maine to St. Louis flight should consider departing on Wednesday afternoons 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.
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Average price of flights to St. Louis by month

Plan your trip from Portland to St. Louis by taking into account the cheapest months to travel. The average price of a one-way flight from Portland to St. Louis is currently $268 while a round-trip flight costs $339. Price data was last updated on April 21, 2024.

Currently, September is the cheapest month in which you can book a flight from Portland, Maine to St. Louis (average of $323). Flying from Portland, Maine to St. Louis in July is currently the most expensive (average of $378). 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

$326

February

$331

March

$357

April

$337

May

$350

June

$373

July

$378

August

$336

September

$323

October

$323

November

$336

December

$326

Temperature and rainfall in St. Louis by month

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

STL

Temperature

32 - 80.6 °F

Reviews of airlines servicing St. Louis

Get insights into the airlines that provide service to St. Louis. 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 St. Louis. Reviews last updated April 25, 2024.
Peruse reviews from past customers who have flown with Delta, American Airlines and United Airlines from Portland to St. Louis to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.1
Very good
10,975 reviews
Check prices

Comfort

7.9

Entertainment

8.0

Boarding

8.2

Crew

8.6

Overall

8.1

Food

7.4

Reviews

1 / 10

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

Delta
8.1
Very good
10,975 reviews
Delta
8.1
Very good
10,975 reviews
Check prices

Comfort

7.9

Entertainment

8.0

Boarding

8.2

Crew

8.6

Overall

8.1

Food

7.4

Reviews

1 / 10

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

United Airlines
7.4
Good
11,234 reviews
Delta
8.1
Very good
10,975 reviews
Check prices

Comfort

7.9

Entertainment

8.0

Boarding

8.2

Crew

8.6

Overall

8.1

Food

7.4

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
10,975 reviews
Check prices

Comfort

7.9

Entertainment

8.0

Boarding

8.2

Crew

8.6

Overall

8.1

Food

7.4

Reviews

1 / 10

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

Sun Country Air
7.3
Good
659 reviews
Delta
8.1
Very good
10,975 reviews
Check prices

Comfort

7.9

Entertainment

8.0

Boarding

8.2

Crew

8.6

Overall

8.1

Food

7.4

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
10,975 reviews
Check prices

Comfort

7.9

Entertainment

8.0

Boarding

8.2

Crew

8.6

Overall

8.1

Food

7.4

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 Portland to St. Louis. 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 Portland, Maine to St. Louis for under $200 on Cheapflights?

    Yes, there are multiple flights from Portland, Maine to St. Louis for under $200. The cheapest flight booked recently is on Frontier for just $148, but on average you can expect to pay $413.

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

    Flying on Frontier is currently your cheapest option to St. Louis, with prices starting at $148. Additional round-trip tickets that might be worth considering are offered by American Airlines and Sun Country Air, with the lowest prices starting at $275 and $305, respectively. Frontier is 68% cheaper than the average price of flights available within the next 90 days to this destination.

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

    For one-way options, check prices for American Airlines. According to our data, you can fly for as low as $157. Users have also found prices from $168 and $364 on Delta and United Airlines, respectively.

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

    When booking a flight from Portland, Maine to St. Louis, you may want to consider flying on American Airlines, JetBlue or Delta as they are the most popular for this route.

  • What does PWM to STL mean?

    PWM stands for Portland Airport, while STL stands for Lambert-St Louis Airport. 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 Portland to St. Louis that include extra baggage allowance?

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

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

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

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

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

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

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

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

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

    The Portland, Maine to St. Louis flight deals you see on this page were last updated on 4/25.

See more FAQs

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

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Top 4 airlines flying from Portland to St. Louis

Discover the top 4 airlines that operate flights from Portland to St. Louis. 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 3,068,701 searches. Data last updated April 25, 2024.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapest$242Average$474FlexibilityNo cancel feeOn-time62%
Search JetBlue flights
United AirlinesCheapest$338Average$540FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
DeltaCheapest$346Average$485FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
American AirlinesCheapest$363Average$501FlexibilityNo cancel feeOn-time71%
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Search flights from Portland to St. Louis by cabin class

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

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Portland to St. Louis. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

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

Cheapflights helps you find that perfect flight to St. Louis from Portland by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

Can Cheapflights find flights from Portland to St. Louis with no change fees?

Certainly. Search results for flights to St. Louis from Portland shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

Can Cheapflights notify me if prices for flights from Portland to St. Louis become cheaper?

Yes, Cheapflights offers price alerts on Portland to St. Louis flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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