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Cheap flights from Portland to St. Louis (PWM - STL) from $76

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 7/9. 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
Jun 18 — Jun 251
From?
To?
Tue 6/18
Tue 6/25
1 adult, Economy
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The best prices from Portland to Lambert-St Louis are usually found in January or November, booked 47 days in advance, depart on a Wednesday or Tuesday 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 June 13, 2024.

Popular in

April

Cheapest in

January

Round-trip from

$318

One-way from

$173
High demand for flights, 23% potential price rise
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Best time to find cheap flights, 16% potential price drop
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From Portland to Lambert-St Louis
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One-way flight 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 53% 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 164% 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 $639 1-2 weeks out and tickets from $639 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 April. For low rates, January can be a great choice for travel to St. Louis. Flights to St. Louis from Portland, Maine in January are about $520 on average during January, but can be found for as low as $254.

What is the cheapest time of day to fly from PWM to 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 20% versus a flight in the afternoon.

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

Find cheap flight options from Portland to St. Louis specifically for the months of June and July 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 3,214,720 searches. Prices were last updated on June 13, 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.
Wed 7/106:02 amPWM - STL
1 stop6h 40mDelta
Wed 7/176:00 amSTL - PWM
1 stop6h 29mDelta
Deal found 6/11$306
Tue 7/306:02 amPWM - STL
1 stop6h 40mDelta
Fri 8/27:10 pmSTL - PWM
1 stop14h 42mDelta
Deal found 6/11$371
Fri 7/2611:59 amPWM - STL
1 stop6h 07mDelta
Mon 7/293:49 pmSTL - PWM
1 stop5h 11mDelta
Deal found 6/12$376
Wed 7/105:26 pmPWM - STL
1 stop5h 03mAmerican Airlines
Wed 7/175:17 amSTL - PWM
2 stops10h 25mAmerican Airlines
Deal found 6/11$476
Wed 7/105:30 amPWM - STL
2 stops11h 10mUnited Airlines
Wed 7/176:30 amSTL - PWM
2 stops16h 23mUnited Airlines
Deal found 6/11$536
Sat 6/225:31 amPWM - STL
1 stop7h 45mAmerican Airlines
Fri 6/285:42 pmSTL - PWM
1 stop5h 11mAmerican Airlines
Deal found 6/12$625
Tue 7/305:03 amPWM - STL
2 stops10h 41mDelta
Thu 8/13:49 pmSTL - PWM
1 stop5h 11mDelta
Deal found 6/11$645
Fri 7/266:00 amPWM - STL
1 stop5h 23mUnited Airlines
Mon 7/295:30 pmSTL - PWM
2 stops19h 21mUnited Airlines
Deal found 6/12$652
Sat 6/2211:40 amPWM - STL
2 stops11h 22mAmerican Airlines
Fri 6/285:42 pmSTL - PWM
1 stop5h 11mAmerican Airlines
Deal found 6/12$662

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 3,214,720 searches. Data last updated June 13, 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.
Sun 9/155:51 pmPWM - STL
1 stop5h 17mAmerican Airlines
Thu 9/194:44 pmSTL - PWM
1 stop5h 12mAmerican Airlines
Deal found 6/11$272
Wed 7/106:02 amPWM - STL
1 stop6h 40mDelta
Wed 7/176:00 amSTL - PWM
1 stop6h 29mDelta
Deal found 6/11$306
Thu 8/16:15 amPWM - STL
1 stop6h 23mDelta
Sun 8/43:00 pmSTL - PWM
1 stop6h 39mDelta
Deal found 6/12$326
Fri 11/15:29 pmPWM - STL
1 stop15h 47mAmerican Airlines
Thu 11/76:32 amSTL - PWM
1 stop9h 10mAmerican Airlines
Deal found 6/12$335
Fri 8/95:54 pmPWM - STL
2 stops24h 35mMultiple Airlines
Sun 8/117:24 pmSTL - PWM
1 stop12h 45mMultiple Airlines
Deal found 6/12$365
Tue 7/306:02 amPWM - STL
1 stop6h 40mDelta
Fri 8/27:10 pmSTL - PWM
1 stop14h 42mDelta
Deal found 6/11$371
Fri 7/2611:59 amPWM - STL
1 stop6h 07mDelta
Mon 7/293:49 pmSTL - PWM
1 stop5h 11mDelta
Deal found 6/12$376
Fri 8/99:49 amPWM - STL
1 stop25h 45mMultiple Airlines
Sun 8/117:24 pmSTL - PWM
1 stop12h 45mMultiple Airlines
Deal found 6/12$379
Thu 8/11:47 pmPWM - STL
3 stops22h 43mMultiple Airlines
Sun 8/47:24 pmSTL - PWM
1 stop12h 45mMultiple Airlines
Deal found 6/12$390

Portland to St. Louis flights leaving soon

Find last-minute flight options from Portland to St. Louis 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 3,214,720 searches. Data last updated June 13, 2024.
Consider one of these great deals we found on last-minute flights from Portland to St. Louis. Tip: verify your flight details before completing your reservation.
Sat 6/225:31 amPWM - STL
1 stop7h 45mAmerican Airlines
Fri 6/285:42 pmSTL - PWM
1 stop5h 11mAmerican Airlines
Deal found 6/12$625
Sat 6/2211:40 amPWM - STL
2 stops11h 22mAmerican Airlines
Fri 6/285:42 pmSTL - PWM
1 stop5h 11mAmerican Airlines
Deal found 6/12$662
Sat 6/2211:40 amPWM - STL
2 stops11h 52mAmerican Airlines
Fri 6/285:38 pmSTL - PWM
2 stops21h 59mAmerican Airlines
Deal found 6/12$773

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 3,214,720 searches. Data last updated June 13, 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.
Tue 7/92:51 pmPWM - STL
1 stop18h 52mFrontier
Deal found 6/12$76
Tue 6/2511:40 amPWM - STL
1 stop20h 45mFrontier
Deal found 6/12$110
Tue 7/306:02 amPWM - STL
1 stop6h 40mDelta
Deal found 6/11$153
Fri 11/226:05 amPWM - STL
1 stop7h 49mDelta
Deal found 6/12$173
Sat 8/36:31 amPWM - STL
1 stop9h 52mAmerican Airlines
Deal found 6/13$199
Mon 8/59:49 amPWM - STL
1 stop25h 35mMultiple Airlines
Deal found 6/13$202
Mon 6/241:05 pmPWM - STL
3 stops22h 52mMultiple Airlines
Deal found 6/12$212
Mon 8/52:06 pmPWM - STL
2 stops20h 20mMultiple Airlines
Deal found 6/13$218
Mon 6/241:05 pmPWM - STL
2 stops26h 18mMultiple Airlines
Deal found 6/12$226

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 3,214,720 searches. Data last updated June 13, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$272 - $536

Route

Depart

Return

Price

PortlandLambert-St Louis

PWM - STL

PWMSTL

Portland

Sun 9/15

1 stop5h 17m

Lambert-St Louis

Thu 9/19

1 stop5h 12m

$272

PortlandLambert-St Louis

PWM - STL

PWMSTL

Portland

Tue 7/30

1 stop6h 40m

Lambert-St Louis

Thu 8/1

1 stop5h 11m

$306

PortlandLambert-St Louis

PWM - STL

PWMSTL

Portland

Thu 8/1

1 stop6h 23m

Lambert-St Louis

Sun 8/4

1 stop6h 39m

$326

PortlandLambert-St Louis

PWM - STL

PWMSTL

Portland

Fri 11/1

1 stop15h 47m

Lambert-St Louis

Thu 11/7

1 stop9h 10m

$335

PortlandLambert-St Louis

PWM - STL

PWMSTL

Portland

Fri 8/9

2 stops24h 35m

Lambert-St Louis

Sun 8/11

1 stop12h 45m

$365

PortlandLambert-St Louis

PWM - STL

PWMSTL

Portland

Tue 7/30

1 stop6h 40m

Lambert-St Louis

Fri 8/2

1 stop14h 42m

$371

PortlandLambert-St Louis

PWM - STL

PWMSTL

Portland

Fri 8/9

1 stop25h 45m

Lambert-St Louis

Sun 8/11

1 stop12h 45m

$379

PortlandLambert-St Louis

PWM - STL

PWMSTL

Portland

Thu 8/1

3 stops22h 43m

Lambert-St Louis

Sun 8/4

1 stop12h 45m

$390

PortlandLambert-St Louis

PWM - STL

PWMSTL

Portland

Wed 7/10

2 stops11h 10m

Lambert-St Louis

Wed 7/17

2 stops16h 23m

$536

Flights are sorted by cheapest first

Deals found on 6/11

How far ahead should I 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 May 31, 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.
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What is the cheapest day 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 June 9, 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.
Search Deals

Best time to book a flight from Portland to St. Louis

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

If weather is an important factor for your trip to St. Louis, 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 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 32.0 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 June 13, 2024.
Peruse reviews from past customers who have flown with American Airlines, Delta 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
8.0
Very good
10,000 reviews

Overall

8.0

Comfort

7.9

Entertainment

8.0

Crew

8.6

Boarding

8.2

Food

7.4

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
10,000 reviews
Delta
8.0
Very good
10,000 reviews

Overall

8.0

Comfort

7.9

Entertainment

8.0

Crew

8.6

Boarding

8.2

Food

7.4

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
10,000 reviews
Delta
8.0
Very good
10,000 reviews

Overall

8.0

Comfort

7.9

Entertainment

8.0

Crew

8.6

Boarding

8.2

Food

7.4

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
10,000 reviews
Delta
8.0
Very good
10,000 reviews

Overall

8.0

Comfort

7.9

Entertainment

8.0

Crew

8.6

Boarding

8.2

Food

7.4

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
3,951 reviews
Delta
8.0
Very good
10,000 reviews

Overall

8.0

Comfort

7.9

Entertainment

8.0

Crew

8.6

Boarding

8.2

Food

7.4

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 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 $300 on Cheapflights?

    Yes, there are multiple flights from Portland, Maine to St. Louis for under $300. The cheapest flight booked recently is on American Airlines for just $272, but on average you can expect to pay $409.

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

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

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

    Flying on American Airlines is currently your cheapest option to St. Louis, with prices starting at $272. Additional round-trip tickets that might be worth considering are offered by Delta and United Airlines, with the lowest prices starting at $306 and $536, respectively. American Airlines is 47% 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 Frontier. According to our data, you can fly for as low as $76. Users have also found prices from $153 and $199 on Delta and American Airlines, respectively.

  • 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 6/12.

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

    Currently, September is the cheapest month in which you can book a flight from Portland, Maine to St. Louis (average of $318). Flying from Portland, Maine to St. Louis in July is currently the most expensive (average of $362). 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.

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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 3,214,720 searches. Data last updated June 13, 2024.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$338Average$540FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$346Average$482FlexibilityNo cancel feeOn-time71%
DeltaCheapest$346Average$470FlexibilityNo cancel feeOn-timeN/A
JetBlueCheapest$412Average$484FlexibilityNo cancel feeOn-time62%
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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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