$204+ Cheap flights from St. Louis to Portland, ME (STL - PWM)
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 5/23. Fares are subject to change and may not be available on all flights or dates of travel.
STL — PWM
Apr 4 — Apr 111
Round-trip
1 adult, Economy
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Find cheap flights from St. Louis to Portland with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from St. Louis to Portland
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Best
Last-minute
One-way
Cheapest flights from St. Louis to PortlandExplore the most affordable flight options available from St. Louis to Portland. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 5, 2026.
Explore the most affordable flight options available from St. Louis to Portland. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 5, 2026.
This United Airlines deal was found by Cheapflights users on 3/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/127:45 am
STL
- PWM
1 stop5h 29m
United Airlines
Tue 5/194:50 pm
PWM
- STL
1 stop5h 23m
United Airlines
Deal found 3/3![United Airlines logo]()
$299
This Southwest deal was found by Cheapflights users on 3/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/121:15 pm
STL
- PWM
1 stop8h 20m
Southwest
Tue 5/193:55 pm
PWM
- STL
1 stop6h 10m
Southwest
Deal found 3/2![Southwest logo]()
$304
This United Airlines deal was found by Cheapflights users on 3/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/87:45 am
STL
- PWM
1 stop5h 35m
United Airlines
Tue 4/147:12 pm
PWM
- STL
1 stop5h 45m
United Airlines
Deal found 3/3![United Airlines logo]()
$319
This United Airlines deal was found by Cheapflights users on 3/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/118:21 am
STL
- PWM
1 stop6h 18m
United Airlines
Tue 4/147:12 pm
PWM
- STL
1 stop5h 45m
United Airlines
Deal found 3/2![United Airlines logo]()
$323
This Southwest deal was found by Cheapflights users on 3/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/85:35 am
STL
- PWM
2 stops8h 45m
Southwest
Tue 4/146:10 am
PWM
- STL
1 stop10h 05m
Southwest
Deal found 3/3![Southwest logo]()
$329
This United Airlines deal was found by Cheapflights users on 3/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/149:10 am
STL
- PWM
1 stop7h 22m
United Airlines
Tue 4/217:12 pm
PWM
- STL
1 stop5h 45m
United Airlines
Deal found 3/1![United Airlines logo]()
$337
This Southwest deal was found by Cheapflights users on 3/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/25:20 am
STL
- PWM
1 stop5h 35m
Southwest
Mon 4/65:30 pm
PWM
- STL
1 stop6h 35m
Southwest
Deal found 3/2![Southwest logo]()
$347
Best flights from St. Louis to PortlandDiscover carefully curated flight deals from St. Louis to Portland that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated March 5, 2026.
Discover carefully curated flight deals from St. Louis to Portland that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated March 5, 2026.
This United Airlines deal was found by Cheapflights users on 3/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/87:45 am
STL
- PWM
1 stop5h 35m
United Airlines
Tue 4/147:12 pm
PWM
- STL
1 stop5h 45m
United Airlines
Deal found 3/3![United Airlines logo]()
$319
This Southwest deal was found by Cheapflights users on 3/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/85:35 am
STL
- PWM
2 stops8h 45m
Southwest
Tue 4/146:10 am
PWM
- STL
1 stop10h 05m
Southwest
Deal found 3/3![Southwest logo]()
$329
This Delta deal was found by Cheapflights users on 2/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/146:48 am
STL
- PWM
1 stop4h 17m
Delta
Tue 4/215:21 am
PWM
- STL
1 stop6h 13m
Delta
Deal found 2/28![Delta logo]()
$337
This United Airlines deal was found by Cheapflights users on 3/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/118:21 am
STL
- PWM
1 stop6h 18m
United Airlines
Tue 4/147:12 pm
PWM
- STL
1 stop5h 45m
United Airlines
Deal found 3/2![United Airlines logo]()
$323
This Southwest deal was found by Cheapflights users on 3/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/25:20 am
STL
- PWM
1 stop5h 35m
Southwest
Mon 4/65:30 pm
PWM
- STL
2 stops7h 35m
Southwest
Deal found 3/2![Southwest logo]()
$352
This Delta deal was found by Cheapflights users on 3/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/196:45 am
STL
- PWM
1 stop4h 15m
Delta
Sat 5/236:00 am
PWM
- STL
1 stop7h 56m
Delta
Deal found 3/1![Delta logo]()
$372
This United Airlines deal was found by Cheapflights users on 2/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/149:10 am
STL
- PWM
1 stop7h 22m
United Airlines
Tue 4/2111:09 am
PWM
- STL
2 stops11h 04m
United Airlines
Deal found 2/28![United Airlines logo]()
$342
This Southwest deal was found by Cheapflights users on 3/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/122:30 pm
STL
- PWM
2 stops7h 05m
Southwest
Tue 5/196:10 am
PWM
- STL
2 stops9h 55m
Southwest
Deal found 3/2![Southwest logo]()
$378
This Southwest deal was found by Cheapflights users on 2/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/147:35 am
STL
- PWM
2 stops6h 45m
Southwest
Tue 4/211:00 pm
PWM
- STL
1 stop9h 05m
Southwest
Deal found 2/28![Southwest logo]()
$383
This United Airlines deal was found by Cheapflights users on 3/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/3111:15 am
STL
- PWM
2 stops11h 13m
United Airlines
Tue 4/74:28 pm
PWM
- STL
1 stop6h 24m
United Airlines
Deal found 3/3![United Airlines logo]()
$422
Last-minute flights from St. Louis to PortlandDiscover last-minute flight deals from St. Louis to Portland. Data last updated March 5, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Portland. Data last updated March 5, 2026 and is based on user searches.
This Southwest deal was found by Cheapflights users on 3/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/312:25 pm
STL
- PWM
2 stops7h 40m
Southwest
Wed 4/14:30 pm
PWM
- STL
1 stop6h 45m
Southwest
Deal found 3/2![Southwest logo]()
$378
This United Airlines deal was found by Cheapflights users on 3/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/316:30 am
STL
- PWM
1 stop7h 52m
United Airlines
Tue 4/77:12 pm
PWM
- STL
1 stop5h 45m
United Airlines
Deal found 3/3![United Airlines logo]()
$398
This Southwest deal was found by Cheapflights users on 3/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/25:20 am
STL
- PWM
1 stop5h 35m
Southwest
Mon 4/65:30 pm
PWM
- STL
1 stop6h 35m
Southwest
Deal found 3/2![Southwest logo]()
$347
This Southwest deal was found by Cheapflights users on 3/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/65:20 am
STL
- PWM
1 stop5h 35m
Southwest
Sun 4/124:20 pm
PWM
- STL
1 stop8h 25m
Southwest
Deal found 3/3![Southwest logo]()
$382
This United Airlines deal was found by Cheapflights users on 3/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/87:45 am
STL
- PWM
1 stop5h 35m
United Airlines
Tue 4/147:12 pm
PWM
- STL
1 stop5h 45m
United Airlines
Deal found 3/3![United Airlines logo]()
$319
This Southwest deal was found by Cheapflights users on 3/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/85:35 am
STL
- PWM
2 stops8h 45m
Southwest
Tue 4/146:10 am
PWM
- STL
1 stop10h 05m
Southwest
Deal found 3/3![Southwest logo]()
$329
This United Airlines deal was found by Cheapflights users on 3/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/118:21 am
STL
- PWM
1 stop6h 18m
United Airlines
Tue 4/147:12 pm
PWM
- STL
1 stop5h 45m
United Airlines
Deal found 3/2![United Airlines logo]()
$323
This United Airlines deal was found by Cheapflights users on 3/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/149:10 am
STL
- PWM
1 stop7h 22m
United Airlines
Tue 4/217:12 pm
PWM
- STL
1 stop5h 45m
United Airlines
Deal found 3/1![United Airlines logo]()
$337
One-way flights from St. Louis to PortlandSearch for one-way flight options from St. Louis to Portland. Find affordable one-way fares based on user searches. Data last updated March 5, 2026.
Search for one-way flight options from St. Louis to Portland. Find affordable one-way fares based on user searches. Data last updated March 5, 2026.
This United Airlines deal was found by Cheapflights users on 3/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/231:13 pm
STL
- PWM
1 stop7h 38m
United Airlines
Deal found 3/2![United Airlines logo]()
$204
This Delta deal was found by Cheapflights users on 3/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/185:30 pm
STL
- PWM
1 stop5h 23m
Delta
Deal found 3/3![Delta logo]()
$214
This United Airlines deal was found by Cheapflights users on 3/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/211:13 pm
STL
- PWM
2 stops9h 38m
United Airlines
Deal found 3/1![United Airlines logo]()
$235
This Southwest deal was found by Cheapflights users on 2/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/232:05 pm
STL
- PWM
2 stops8h 05m
Southwest
Deal found 2/28![Southwest logo]()
$238
This Kiwi.com deal was found by Cheapflights users on 3/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/153:48 pm
STL
- PWM
3 stops29h 51m
Multiple Airlines
Deal found 3/1![Multiple Airlines logo]()
$286
This Kiwi.com deal was found by Cheapflights users on 2/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/238:08 pm
STL
- PWM
3 stops22h 08m
Multiple Airlines
Deal found 2/28![Multiple Airlines logo]()
$359
This United Airlines deal was found by Cheapflights users on 3/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/186:00 am
STL
- PWM
2 stops12h 27m
United Airlines
Deal found 3/4![United Airlines logo]()
$504
Find 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 March 5, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $299 (United Airlines) |
One-way from | $204 (United Airlines) |
Popular in | January |
Cheapest in | March |
Average price | $349 |
Cheapflights Fare Finder
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 2,558,603 searches. Data last updated March 5, 2026.
Use the filters below to find and compare flights from St. Louis to Portland that are best for you.
Fly from
Fly to
Route
Depart
Return
St. LouisPortland
STL - PWM
STLPWM
Lambert-St Louis
Wed 4/8
7:45 am-2:20 pm
1 stop5h 35m
Portland
Tue 4/14
7:12 pm-11:57 pm
1 stop5h 45m
$319
St. LouisPortland
STL - PWM
STLPWM
Lambert-St Louis
Sat 4/11
8:21 am-3:39 pm
1 stop6h 18m
Portland
Tue 4/14
7:12 pm-11:57 pm
1 stop5h 45m
$323
St. LouisPortland
STL - PWM
STLPWM
Lambert-St Louis
Wed 4/8
5:35 am-3:20 pm
2 stops8h 45m
Portland
Tue 4/14
6:10 am-3:15 pm
1 stop10h 05m
$329
St. LouisPortland
STL - PWM
STLPWM
Lambert-St Louis
Tue 4/14
6:48 am-12:05 pm
1 stop4h 17m
Portland
Tue 4/21
5:21 am-10:34 am
1 stop6h 13m
$337
St. LouisPortland
STL - PWM
STLPWM
Lambert-St Louis
Tue 4/14
9:10 am-5:32 pm
1 stop7h 22m
Portland
Tue 4/21
11:09 am-9:13 pm
2 stops11h 04m
$342
St. LouisPortland
STL - PWM
STLPWM
Lambert-St Louis
Thu 4/2
5:20 am-11:55 am
1 stop5h 35m
Portland
Mon 4/6
5:30 pm-12:05 am
2 stops7h 35m
$352
St. LouisPortland
STL - PWM
STLPWM
Lambert-St Louis
Tue 5/19
6:45 am-12:00 pm
1 stop4h 15m
Portland
Sat 5/23
6:00 am-12:56 pm
1 stop7h 56m
$372
St. LouisPortland
STL - PWM
STLPWM
Lambert-St Louis
Tue 5/12
2:30 pm-10:35 pm
2 stops7h 05m
Portland
Tue 5/19
6:10 am-3:05 pm
2 stops9h 55m
$378
St. LouisPortland
STL - PWM
STLPWM
Lambert-St Louis
Tue 4/14
7:35 am-3:20 pm
2 stops6h 45m
Portland
Tue 4/21
1:00 pm-9:05 pm
1 stop9h 05m
$383
St. LouisPortland
STL - PWM
STLPWM
Lambert-St Louis
Tue 3/31
11:15 am-11:28 pm
2 stops11h 13m
Portland
Tue 4/7
4:28 pm-9:52 pm
1 stop6h 24m
$422
Showing 1-10 of 16 resultsSorted by cheapest first
Compare providers for flights from St. Louis to Portland
Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from St. Louis to Portland in March.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on St. Louis-Portland, Maine flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on St. Louis-Portland, Maine flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from St. Louis-Portland, Maine flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on St. Louis-Portland, Maine flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for St. Louis-Portland, Maine flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.
Best time to book a flight from St. Louis to Portland
Have a flexible travel schedule? Discover the best time to fly to Portland from St. Louis with our price prediction graph.
STL-PWM
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.
Cheapflights Insights
Everything you need to know about your flight from St. Louis to Portland
Prices
More
How far ahead should I 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 February 27, 2026.
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 58 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.
What is the cheapest month to book a flight from St. Louis to Portland, Maine?
Currently, September is the cheapest month in which you can book a flight from St. Louis to Portland, Maine (average of $177). Flying from St. Louis to Portland, Maine in March is currently the most expensive (average of $299). 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.
What’s the top layover airport for flights from St. Louis to Portland, Maine?
Share of 1-stop round-trip flights from St. Louis to Portland, Maine chosen by Cheapflights users in the past 12 months, using the same layover each way.
Baltimore (BWI) – chosen by Cheapflights users on 67% of 1-stop itineraries from St. Louis to Portland, Maine on Cheapflights.
What’s the cheapest layover airport for flights from St. Louis to Portland, Maine?
Average round-trip fare for 1-stop flights from St. Louis to Portland, Maine, chosen by Cheapflights users in the past 12 months, with the same layover each way.
Baltimore (BWI) is the most affordable 1-stop option, with an average round-trip price of $295.
What’s the fastest layover option from St. Louis to Portland, Maine?
Shortest average travel time for 1-stop one-way flights from St. Louis to Portland, Maine, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by layover airport.
Flights via Newark (EWR) have the shortest average one-way travel time for 1-stop routes: 4h 49m.
Which airport typically offers the quickest layover for flights from St. Louis to Portland, Maine?
Average layover duration for 1-stop one-way flights from St. Louis to Portland, Maine, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.
Flights via Newark (EWR) offer the fastest connection on this route, with an average layover time of 1h 08m.
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 March 5, 2026.
See what other customers who have flown with Southwest, Delta, and United Airlines from St. Louis to Portland have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Boarding
8.1
Comfort
8.0
Entertainment
7.5
Food
7.0
Crew
8.6
Overall
8.0
Reviews
1 / 20
10.0
ExcellentAnonymous,Mar 2026
KOA - HNL
Boarding
8.1
Comfort
8.0
Entertainment
7.5
Food
7.0
Crew
8.6
Overall
8.0
Reviews
1 / 20
10.0
ExcellentAnonymous,Mar 2026
KOA - HNL
Boarding
8.1
Comfort
8.0
Entertainment
7.5
Food
7.0
Crew
8.6
Overall
8.0
Reviews
1 / 20
10.0
ExcellentAnonymous,Mar 2026
KOA - HNL
Boarding
8.1
Comfort
8.0
Entertainment
7.5
Food
7.0
Crew
8.6
Overall
8.0
Reviews
1 / 20
10.0
ExcellentAnonymous,Mar 2026
KOA - HNL
Boarding
8.1
Comfort
8.0
Entertainment
7.5
Food
7.0
Crew
8.6
Overall
8.0
Reviews
1 / 20
10.0
ExcellentAnonymous,Mar 2026
KOA - HNL
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.
Traveling to a place near Portland?
Book flights to Portland if you plan to visit one of these locationsNorth Conway
Brunswick
Auburn
Conway
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Alternative routes for St. Louis to Portland
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St. Louis and Portland flights
Browse other St. Louis and Portland flight options. Last updated on March 5, 2026.
Other flights from St. Louis
Browse through other flights departing from St. Louis. Flights are based on user searches made on Cheapflights and were last updated on March 5, 2026.
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Other flights to Portland
Explore flights to Portland departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on March 5, 2026.
Top 4 airlines flying from St. Louis to Portland
Discover the top 4 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 2,558,603 searches. Data last updated March 5, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$212 | Average$472 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$272 | Average$405 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$284 | Average$482 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$284 | Average$406 | FlexibilityNo cancel fee | On-time71% |