HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news

Cheap flights from Portland to St. Louis (PWM - STL) from $180

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 7/7. 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 2 — Jun 91
From?
To?
Sun 6/2
Sun 6/9
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

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 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 May 28, 2024.

Popular in

April

Cheapest in

January

Round-trip from

$319

One-way from

$180
High demand for flights, 23% potential price rise
Search Deals
Best time to find cheap flights, 16% potential price drop
Search Deals
From Portland to Lambert-St Louis
Search Deals
One-way flight from Portland to Lambert-St Louis
Search Deals

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 45% 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.

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 17% versus a flight in the afternoon.

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 2,740,132 searches. Data last updated May 28, 2024.
Check out some of the cheapest American Airlines 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.
Wed 10/165:13 pmPWM - STL
1 stop7h 07mAmerican Airlines
Mon 10/215:37 amSTL - PWM
1 stop4h 47mAmerican Airlines
Deal found 5/26$303
Fri 10/47:29 amPWM - STL
1 stop5h 29mAmerican Airlines
Mon 10/76:28 pmSTL - PWM
1 stop4h 10mAmerican Airlines
Deal found 5/28$305
Sun 9/1512:21 pmPWM - STL
1 stop6h 03mAmerican Airlines
Thu 9/196:00 amSTL - PWM
1 stop4h 46mAmerican Airlines
Deal found 5/27$326
Thu 10/1711:20 amPWM - STL
1 stop8h 29mAmerican Airlines
Tue 10/225:37 amSTL - PWM
1 stop4h 47mAmerican Airlines
Deal found 5/26$359
Sat 7/135:59 amPWM - STL
1 stop7h 43mAmerican Airlines
Mon 7/155:46 pmSTL - PWM
1 stop5h 00mAmerican Airlines
Deal found 5/27$365
Mon 6/1011:35 amPWM - STL
1 stop9h 38mAmerican Airlines
Wed 6/125:38 pmSTL - PWM
1 stop6h 14mAmerican Airlines
Deal found 5/28$537
Sun 6/27:45 amPWM - STL
1 stop6h 25mAmerican Airlines
Fri 6/75:15 amSTL - PWM
1 stop5h 59mAmerican Airlines
Deal found 5/27$661
Sun 9/157:29 amPWM - STL
1 stop5h 29mAmerican Airlines
Thu 9/195:35 pmSTL - PWM
2 stops16h 05mAmerican Airlines
Deal found 5/27$713
Sat 7/275:05 pmPWM - STL
2 stops20h 22mAmerican Airlines
Sat 8/39:24 amSTL - PWM
2 stops12h 22mAmerican Airlines
Deal found 5/27$718

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 2,740,132 searches. Data last updated May 28, 2024.
Some of the best deals we've found on Delta flights traveling from Portland to St. Louis. Check back soon if you're not seeing flights that suit your needs.
Thu 10/176:05 amPWM - STL
1 stop5h 38mDelta
Mon 10/213:40 pmSTL - PWM
1 stop6h 27mDelta
Deal found 5/26$422
Thu 10/176:05 amPWM - STL
1 stop5h 38mDelta
Wed 10/236:00 pmSTL - PWM
1 stop4h 06mDelta
Deal found 5/26$428
Wed 10/1612:55 pmPWM - STL
1 stop5h 32mDelta
Wed 10/237:10 amSTL - PWM
1 stop5h 23mDelta
Deal found 5/26$432
Wed 10/1612:55 pmPWM - STL
1 stop8h 36mDelta
Tue 10/225:05 pmSTL - PWM
1 stop5h 24mDelta
Deal found 5/26$442
Wed 10/166:30 amPWM - STL
2 stops10h 26mDelta
Mon 10/213:40 pmSTL - PWM
1 stop6h 27mDelta
Deal found 5/26$728
Thu 10/176:05 amPWM - STL
1 stop7h 49mDelta
Tue 10/222:05 pmSTL - PWM
2 stops8h 02mDelta
Deal found 5/26$738
Sat 7/137:00 amPWM - STL
2 stops8h 44mDelta
Mon 7/1510:08 amSTL - PWM
2 stops11h 31mDelta
Deal found 5/27$1,041
Sun 6/25:00 amPWM - STL
2 stops10h 15mDelta
Fri 6/71:01 pmSTL - PWM
2 stops10h 23mDelta
Deal found 5/27$1,306
Wed 10/1611:25 amPWM - STL
2 stops10h 06mDelta
Mon 10/212:05 pmSTL - PWM
2 stops8h 02mDelta
Deal found 5/26$1,441

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

Find cheap flight options from Portland to St. Louis specifically for the months of May and June 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 2,740,132 searches. Prices were last updated on May 28, 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.
Mon 6/1010:50 amPWM - STL
1 stop25h 07mMultiple Airlines
Wed 6/121:55 pmSTL - PWM
2 stops21h 46mMultiple Airlines
Deal found 5/28$383
Mon 6/107:39 pmPWM - STL
2 stops19h 44mMultiple Airlines
Wed 6/121:55 pmSTL - PWM
2 stops21h 46mMultiple Airlines
Deal found 5/28$408
Mon 6/107:39 pmPWM - STL
2 stops19h 44mMultiple Airlines
Wed 6/1212:15 pmSTL - PWM
3 stops23h 26mMultiple Airlines
Deal found 5/28$413
Mon 6/102:06 pmPWM - STL
3 stops21h 51mMultiple Airlines
Wed 6/1212:15 pmSTL - PWM
3 stops23h 26mMultiple Airlines
Deal found 5/28$452
Tue 5/2811:50 amPWM - STL
1 stop5h 08mUnited Airlines
Sat 7/273:43 pmSTL - PWM
1 stop4h 50mUnited Airlines
Deal found 5/27$493
Mon 6/1011:35 amPWM - STL
1 stop9h 38mAmerican Airlines
Wed 6/125:38 pmSTL - PWM
1 stop6h 14mAmerican Airlines
Deal found 5/28$537
Wed 5/2912:21 pmPWM - STL
1 stop8h 09mAmerican Airlines
Sun 6/24:20 pmSTL - PWM
1 stop5h 24mAmerican Airlines
Deal found 5/27$661
Tue 5/284:50 pmPWM - STL
1 stop5h 57mUnited Airlines
Sat 7/278:05 amSTL - PWM
2 stops11h 50mUnited Airlines
Deal found 5/27$696
Wed 5/295:30 amPWM - STL
2 stops11h 11mUnited Airlines
Sun 6/26:08 amSTL - PWM
1 stop6h 43mUnited Airlines
Deal found 5/27$839

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 2,740,132 searches. Data last updated May 28, 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 10/165:13 pmPWM - STL
1 stop7h 07mAmerican Airlines
Mon 10/215:37 amSTL - PWM
1 stop4h 47mAmerican Airlines
Deal found 5/26$303
Fri 10/47:29 amPWM - STL
1 stop5h 29mAmerican Airlines
Mon 10/76:28 pmSTL - PWM
1 stop4h 10mAmerican Airlines
Deal found 5/28$305
Sun 9/1512:21 pmPWM - STL
1 stop6h 03mAmerican Airlines
Thu 9/196:00 amSTL - PWM
1 stop4h 46mAmerican Airlines
Deal found 5/27$326
Thu 10/1711:20 amPWM - STL
1 stop8h 29mAmerican Airlines
Tue 10/225:37 amSTL - PWM
1 stop4h 47mAmerican Airlines
Deal found 5/26$359
Sat 7/135:59 amPWM - STL
1 stop7h 43mAmerican Airlines
Mon 7/155:46 pmSTL - PWM
1 stop5h 00mAmerican Airlines
Deal found 5/27$365
Mon 6/1010:50 amPWM - STL
1 stop25h 07mMultiple Airlines
Wed 6/121:55 pmSTL - PWM
2 stops21h 46mMultiple Airlines
Deal found 5/28$383
Mon 6/107:39 pmPWM - STL
2 stops19h 44mMultiple Airlines
Wed 6/121:55 pmSTL - PWM
2 stops21h 46mMultiple Airlines
Deal found 5/28$408
Mon 6/107:39 pmPWM - STL
2 stops19h 44mMultiple Airlines
Wed 6/1212:15 pmSTL - PWM
3 stops23h 26mMultiple Airlines
Deal found 5/28$413
Thu 10/176:05 amPWM - STL
1 stop5h 38mDelta
Mon 10/213:40 pmSTL - PWM
1 stop6h 27mDelta
Deal found 5/26$422

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 2,740,132 searches. Data last updated May 28, 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.
Sun 6/27:45 amPWM - STL
1 stop6h 25mAmerican Airlines
Fri 6/75:15 amSTL - PWM
1 stop5h 59mAmerican Airlines
Deal found 5/27$661
Sun 6/27:45 amPWM - STL
2 stops8h 47mAmerican Airlines
Fri 6/75:15 amSTL - PWM
1 stop5h 59mAmerican Airlines
Deal found 5/27$870
Sun 6/25:00 amPWM - STL
2 stops10h 15mDelta
Fri 6/71:01 pmSTL - PWM
2 stops10h 23mDelta
Deal found 5/27$1,306

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 2,740,132 searches. Data last updated May 28, 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.
Sun 7/77:37 pmPWM - STL
1 stop14h 06mFrontier
Deal found 5/27$180
Sat 6/151:05 pmPWM - STL
1 stop7h 24mAmerican Airlines
Deal found 5/28$212
Sat 6/151:30 pmPWM - STL
3 stops28h 02mMultiple Airlines
Deal found 5/28$228
Sun 7/71:27 pmPWM - STL
2 stops25h 24mMultiple Airlines
Deal found 5/27$330
Sun 7/71:27 pmPWM - STL
3 stops23h 03mMultiple Airlines
Deal found 5/27$361
Sat 6/1512:34 pmPWM - STL
2 stops26h 52mAmerican Airlines
Deal found 5/28$370
Sun 7/76:01 amPWM - STL
2 stops12h 18mAmerican Airlines
Deal found 5/27$484

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 2,740,132 searches. Data last updated May 28, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$303 - $457

Route

Depart

Return

Price

PortlandLambert-St Louis

PWM - STL

PWMSTL

Portland

Wed 10/16

1 stop7h 07m

Lambert-St Louis

Mon 10/21

1 stop4h 47m

$303

PortlandLambert-St Louis

PWM - STL

PWMSTL

Portland

Fri 10/4

1 stop5h 29m

Lambert-St Louis

Mon 10/7

1 stop4h 10m

$305

PortlandLambert-St Louis

PWM - STL

PWMSTL

Portland

Sun 9/15

1 stop6h 03m

Lambert-St Louis

Thu 9/19

1 stop4h 46m

$326

PortlandLambert-St Louis

PWM - STL

PWMSTL

Portland

Thu 10/17

1 stop8h 29m

Lambert-St Louis

Tue 10/22

1 stop4h 47m

$359

PortlandLambert-St Louis

PWM - STL

PWMSTL

Portland

Mon 6/10

1 stop25h 07m

Lambert-St Louis

Wed 6/12

2 stops21h 46m

$383

PortlandLambert-St Louis

PWM - STL

PWMSTL

Portland

Mon 6/10

2 stops19h 44m

Lambert-St Louis

Wed 6/12

2 stops21h 46m

$408

PortlandLambert-St Louis

PWM - STL

PWMSTL

Portland

Thu 10/17

1 stop5h 38m

Lambert-St Louis

Mon 10/21

1 stop6h 27m

$422

PortlandLambert-St Louis

PWM - STL

PWMSTL

Portland

Thu 10/17

1 stop5h 38m

Lambert-St Louis

Wed 10/23

1 stop4h 06m

$428

PortlandLambert-St Louis

PWM - STL

PWMSTL

Portland

Fri 10/4

1 stop5h 07m

Lambert-St Louis

Mon 10/7

2 stops11h 50m

$457

Flights are sorted by cheapest first

Deals found on 5/26

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 May 24, 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 May 26, 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

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 May 28, 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
10,476 reviews
Check prices

Crew

8.6

Comfort

7.9

Boarding

8.2

Overall

8.0

Food

7.4

Entertainment

8.0

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
10,476 reviews
Delta
8.0
Very good
10,476 reviews
Check prices

Crew

8.6

Comfort

7.9

Boarding

8.2

Overall

8.0

Food

7.4

Entertainment

8.0

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
10,799 reviews
Delta
8.0
Very good
10,476 reviews
Check prices

Crew

8.6

Comfort

7.9

Boarding

8.2

Overall

8.0

Food

7.4

Entertainment

8.0

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
14,316 reviews
Delta
8.0
Very good
10,476 reviews
Check prices

Crew

8.6

Comfort

7.9

Boarding

8.2

Overall

8.0

Food

7.4

Entertainment

8.0

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
6.3
Okay
4,016 reviews
Delta
8.0
Very good
10,476 reviews
Check prices

Crew

8.6

Comfort

7.9

Boarding

8.2

Overall

8.0

Food

7.4

Entertainment

8.0

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 $400 on Cheapflights?

    Yes, there are multiple flights from Portland, Maine to St. Louis for under $400. The cheapest flight booked recently is on American Airlines for just $303, but on average you can expect to pay $458.

  • 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 $303. Additional round-trip tickets that might be worth considering are offered by Delta and United Airlines, with the lowest prices starting at $422 and $457, respectively. American Airlines is 41% cheaper than the average price of flights available within the next 90 days to this destination.

  • 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 5/28.

  • 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.

  • When is the best time 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 $319). Flying from Portland, Maine to St. Louis in July is currently the most expensive (average of $366). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

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

Boston to Kansas City flights
Boston to St. Louis flights
Boston to Springfield flights
Portland to Kansas City flights
Portland to Springfield flights
Bangor to Kansas City flights
Boston to Joplin flights
Boston to Columbia flights
Bangor to St. Louis flights

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 2,740,132 searches. Data last updated May 28, 2024.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$339Average$561FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
DeltaCheapest$346Average$476FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
American AirlinesCheapest$362Average$492FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
JetBlueCheapest$412Average$484FlexibilityNo cancel feeOn-time62%
Search JetBlue flights
Chicago to Fort Lauderdale flights
San Francisco to Los Angeles flights
Las Vegas to Atlanta flights
San Diego to Las Vegas flights
Denver to London flights
Miami to New York flights
Los Angeles to Orlando flights
Chicago to Las Vegas flights
San Francisco to Cabo San Lucas flights
Seattle to Las Vegas flights
Orlando to London flights
Portland, Maine to Stockholm flights

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.
First Class
Business Class
Prem Econ Class
Economy Class

Book a flight to one of these trending destinations

User searches for flights to these destinations increased 20% or more in the past 90 days compared to other destinations
Flights to Laayoune Hassan I
Flights to Virac
Flights to Figari-Sud Corse
Flights to Edremit/Korfez
Flights to Rhinelander Oneida County
Flights to Girona Costa Brava
Flights to Brainerd Crow Wing County
Flights to Parikia Paros
Flights to Cortez Montezuma County
Flights to Miyakojima Hirara
Flights to Zadar
Flights to Trapani Birgi
Flights to Provincetown
Flights to Oran Es Senia
Flights to Constanţa Mihail Kogalniceanu
Flights to Vava'u Lupepau'U
Flights to Urumqi
Flights to Hakodate
Flights to Naxos
Flights to Dalaman
Flights to Hyannis Barnstable
Flights to Devils Lake
Flights to Bastia Poretta
Flights to Karpathos

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.

100% Free
Cheapflights is completely free to use, so you can start saving the moment you arrive.
Book with Flexibility
Our users can plan ahead with confidence and find flights with no change fees
Travel Smart
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.
View all available airlines