$161+ Cheap flights from St. Louis to Portland, ME (STL - PWM)
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 10/9. Fares are subject to change and may not be available on all flights or dates of travel.
STL — PWM
Oct 11 — Oct 181
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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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 September 11, 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 September 11, 2026.
This American Airlines deal was found by Cheapflights users on 9/10. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/16:00 am -
1 stop4h 56m
Sat 12/123:25 pm -
1 stop5h 12m
Deal found 9/10![American Airlines logo]()
$339
This American Airlines deal was found by Cheapflights users on 9/8. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/155:08 pm -
1 stop5h 51m
Wed 10/216:00 am -
1 stop5h 18m
Deal found 9/8![American Airlines logo]()
$342
This United Airlines deal was found by Cheapflights users on 9/10. 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 10/1710:27 am -
2 stops7h 57m
Wed 10/217:58 am -
1 stop5h 15m
Deal found 9/10![United Airlines logo]()
$344
This Southwest deal was found by Cheapflights users on 9/8. 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 11/46:20 am -
2 stops7h 25m
Mon 11/95:10 pm -
2 stops7h 45m
Deal found 9/8![Southwest logo]()
$349
This American Airlines deal was found by Cheapflights users on 9/10. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/25:13 pm -
1 stop5h 32m
Wed 10/74:27 pm -
1 stop6h 19m
Deal found 9/10![American Airlines logo]()
$354
This United Airlines deal was found by Cheapflights users on 9/10. 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 10/64:50 pm -
1 stop5h 38m
Thu 10/86:00 am -
1 stop6h 22m
Deal found 9/10![United Airlines logo]()
$370
This Kiwi.com deal was found by Cheapflights users on 9/8. 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.
Thu 10/154:30 pm -
1 stop15h 38m
Mon 10/197:00 am -
2 stops11h 40m
Deal found 9/8![Multiple Airlines logo]()
$375
This Kiwi.com deal was found by Cheapflights users on 9/8. 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.
Thu 10/154:30 pm -
1 stop15h 38m
Wed 10/215:09 pm -
2 stops31h 04m
Deal found 9/8![Multiple Airlines logo]()
$378
This Southwest deal was found by Cheapflights users on 9/8. 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.
Fri 10/165:40 pm -
1 stop5h 15m
Wed 10/215:40 am -
2 stops10h 20m
Deal found 9/8![Southwest logo]()
$382
This Southwest deal was found by Cheapflights users on 9/7. 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.
Fri 12/256:35 am -
1 stop7h 10m
Sat 1/95:30 am -
2 stops11h 00m
Deal found 9/7![Southwest logo]()
$386
This Southwest deal was found by Cheapflights users on 9/7. 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 10/177:20 am -
2 stops7h 35m
Wed 10/215:40 am -
2 stops10h 20m
Deal found 9/7![Southwest logo]()
$387
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 September 11, 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 September 11, 2026.
This United Airlines deal was found by Cheapflights users on 9/9. 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 10/208:00 am -
1 stop5h 38m
Sat 10/248:03 am -
2 stops7h 13m
Deal found 9/9![United Airlines logo]()
$344
This Southwest deal was found by Cheapflights users on 9/9. 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 10/202:10 pm -
2 stops7h 30m
Sat 10/245:35 am -
2 stops8h 25m
Deal found 9/9![Southwest logo]()
$391
This Southwest deal was found by Cheapflights users on 9/8. 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.
Fri 10/164:30 pm -
2 stops6h 25m
Wed 10/215:40 am -
2 stops10h 20m
Deal found 9/8![Southwest logo]()
$397
This United Airlines deal was found by Cheapflights users on 9/9. 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 10/246:00 am -
1 stop7h 38m
Wed 10/285:50 am -
2 stops9h 39m
Deal found 9/9![United Airlines logo]()
$434
This Southwest deal was found by Cheapflights users on 9/5. 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.
Fri 10/302:00 pm -
1 stop6h 55m
Tue 11/312:45 pm -
1 stop6h 20m
Deal found 9/5![Southwest logo]()
$403
This United Airlines deal was found by Cheapflights users on 9/8. 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 12/16:33 am -
2 stops11h 14m
Sat 12/123:15 pm -
1 stop8h 00m
Deal found 9/8![United Airlines logo]()
$434
This United Airlines deal was found by Cheapflights users on 9/8. 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 12/21:15 pm -
2 stops9h 09m
Tue 12/153:15 pm -
1 stop8h 00m
Deal found 9/8![United Airlines logo]()
$434
This Southwest deal was found by Cheapflights users on 9/6. 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 9/261:25 pm -
2 stops6h 40m
Wed 9/306:15 pm -
1 stop5h 00m
Deal found 9/6![Southwest logo]()
$475
This United Airlines deal was found by Cheapflights users on 9/8. 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.
Fri 10/211:35 am -
2 stops10h 53m
Wed 10/76:00 am -
2 stops10h 21m
Deal found 9/8![United Airlines logo]()
$516
Last-minute flights from St. Louis to PortlandDiscover last-minute flight deals from St. Louis to Portland. Data last updated September 11, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Portland. Data last updated September 11, 2026 and is based on user searches.
This American Airlines deal was found by Cheapflights users on 9/10. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/25:13 pm -
1 stop5h 32m
Wed 10/74:27 pm -
1 stop6h 19m
Deal found 9/10![American Airlines logo]()
$354
This United Airlines deal was found by Cheapflights users on 9/10. 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 10/64:50 pm -
1 stop5h 38m
Thu 10/86:00 am -
1 stop6h 22m
Deal found 9/10![United Airlines logo]()
$370
This American Airlines deal was found by Cheapflights users on 9/9. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/145:08 pm -
1 stop5h 51m
Sat 10/175:30 am -
1 stop6h 11m
Deal found 9/9![American Airlines logo]()
$389
This American Airlines deal was found by Cheapflights users on 9/8. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/155:08 pm -
1 stop5h 51m
Wed 10/216:00 am -
1 stop5h 18m
Deal found 9/8![American Airlines logo]()
$342
This Kiwi.com deal was found by Cheapflights users on 9/8. 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.
Thu 10/154:30 pm -
1 stop15h 38m
Mon 10/197:00 am -
2 stops11h 40m
Deal found 9/8![Multiple Airlines logo]()
$375
This Kiwi.com deal was found by Cheapflights users on 9/8. 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.
Thu 10/154:30 pm -
1 stop15h 38m
Wed 10/215:09 pm -
2 stops31h 04m
Deal found 9/8![Multiple Airlines logo]()
$378
This Southwest deal was found by Cheapflights users on 9/8. 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.
Fri 10/165:40 pm -
1 stop5h 15m
Wed 10/215:40 am -
2 stops10h 20m
Deal found 9/8![Southwest logo]()
$382
This Southwest deal was found by Cheapflights users on 9/10. 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 10/179:25 am -
1 stop5h 30m
Wed 10/215:40 am -
1 stop6h 55m
Deal found 9/10![Southwest logo]()
$339
This United Airlines deal was found by Cheapflights users on 9/10. 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 10/1710:27 am -
2 stops7h 57m
Wed 10/217:58 am -
1 stop5h 15m
Deal found 9/10![United Airlines logo]()
$344
This American Airlines deal was found by Cheapflights users on 9/8. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/225:40 pm -
1 stop4h 56m
Sun 10/255:30 am -
1 stop6h 11m
Deal found 9/8![American Airlines logo]()
$388
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 September 11, 2026.
Search for one-way flight options from St. Louis to Portland. Find affordable one-way fares based on user searches. Data last updated September 11, 2026.
This Kiwi.com deal was found by Cheapflights users on 9/7. 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.
Fri 10/96:35 pm -
2 stops22h 16m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/7![Multiple Airlines logo]()
$161
This Delta deal was found by Cheapflights users on 9/8. 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 10/66:47 am -
1 stop4h 10m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/8![Delta logo]()
$170
This American Airlines deal was found by Cheapflights users on 9/8. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/155:08 pm -
1 stop5h 51m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/8![American Airlines logo]()
$173
This American Airlines deal was found by Cheapflights users on 9/9. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/95:08 pm -
1 stop5h 51m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/9![American Airlines logo]()
$202
This United Airlines deal was found by Cheapflights users on 9/7. 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 10/311:35 am -
2 stops7h 47m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/7![United Airlines logo]()
$207
This deal was found by Cheapflights users on 9/8. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/68:00 am -
1 stop5h 38m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/8![United Airlines logo]()
$215
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 September 11, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $339 (American Airlines) |
One-way from | $161 (Kiwi.com) |
Popular in | January |
Cheapest in | March |
Average price | $429 |
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 7,457,451 searches. Data last updated September 11, 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
Cheapest round-trip
Quickest round-trip
St. LouisPortland
STL Lambert-St Louis - PWM Portland
STLPWM
Lambert-St Louis
Tue 10/6
6:47 am-11:57 am
1 stop4h 10m
Portland
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$170
St. LouisPortland
STL Lambert-St Louis - PWM Portland
STLPWM
Lambert-St Louis
Thu 10/15
5:35 pm-11:35 pm
1 stop5h 00m
Portland
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$170
St. LouisPortland
STL Lambert-St Louis - PWM Portland
STLPWM
Lambert-St Louis
Fri 10/9
5:08 pm-11:59 pm
1 stop5h 51m
Portland
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$205
St. LouisPortland
STL Lambert-St Louis - PWM Portland
STLPWM
Lambert-St Louis
Sat 11/21
6:00 am-2:16 pm
1 stop7h 16m
Portland
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$219
St. LouisPortland
STL Lambert-St Louis - PWM Portland
STLPWM
Lambert-St Louis
Tue 10/6
11:35 am-11:28 pm
2 stops10h 53m
Portland
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$220
St. LouisPortland
STL Lambert-St Louis - PWM Portland
STLPWM
Lambert-St Louis
Sat 11/21
2:45 pm-12:05 am
2 stops8h 20m
Portland
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$224
St. LouisPortland
STL Lambert-St Louis - PWM Portland
STLPWM
Lambert-St Louis
Fri 10/9
7:50 pm-9:45 am
2 stops12h 55m
Portland
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$270
St. LouisPortland
STL Lambert-St Louis - PWM Portland
STLPWM
Lambert-St Louis
Thu 10/15
8:00 am-7:24 pm
2 stops10h 24m
Portland
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$340
St. LouisPortland
STL Lambert-St Louis - PWM Portland
STLPWM
Lambert-St Louis
Tue 10/20
8:00 am-2:38 pm
1 stop5h 38m
Portland
Sat 10/24
8:03 am-2:16 pm
2 stops7h 13m
$344
St. LouisPortland
STL Lambert-St Louis - PWM Portland
STLPWM
Lambert-St Louis
Tue 10/20
2:10 pm-10:40 pm
2 stops7h 30m
Portland
Sat 10/24
5:35 am-1:00 pm
2 stops8h 25m
$391
Showing 1-10 of 17 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 September.
| 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
How far ahead should I book a flight from St. Louis to Portland, Maine?
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 16 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, March is the cheapest month in which you can book a flight from St. Louis to Portland, Maine (average of $349). Flying from St. Louis to Portland, Maine in January is currently the most expensive (average of $574). 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.
How much does it cost to fly round-trip from St. Louis to Portland, Maine?
Airfare is below average for this route at the moment.
St. Louis to Portland, Maine flights typically cost between $389 and $488 in December.The cheapest round-trip price found within the last 5 days was $339 on American Airlines (Dec 1-Dec 12).
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 September 11, 2026.
See what other customers who have flown with Southwest,Delta, andUnited 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.
Entertainment
7.5
Food
7.0
Overall
8.0
Comfort
8.0
Crew
8.6
Boarding
8.1
Reviews
1 / 20
4.0
OkaySteven,Sep 2026
OGG - HNL
Entertainment
7.5
Food
7.0
Overall
8.0
Comfort
8.0
Crew
8.6
Boarding
8.1
Reviews
1 / 20
4.0
OkaySteven,Sep 2026
OGG - HNL
Entertainment
7.5
Food
7.0
Overall
8.0
Comfort
8.0
Crew
8.6
Boarding
8.1
Reviews
1 / 20
4.0
OkaySteven,Sep 2026
OGG - HNL
Entertainment
7.5
Food
7.0
Overall
8.0
Comfort
8.0
Crew
8.6
Boarding
8.1
Reviews
1 / 20
4.0
OkaySteven,Sep 2026
OGG - HNL
Entertainment
7.5
Food
7.0
Overall
8.0
Comfort
8.0
Crew
8.6
Boarding
8.1
Reviews
1 / 20
4.0
OkaySteven,Sep 2026
OGG - 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
Lewiston
Brunswick
Conway
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St. Louis and Portland flights
Browse other St. Louis and Portland flight options. Last updated on September 11, 2026.
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Browse through other flights departing from St. Louis. Flights are based on user searches made on Cheapflights and were last updated on September 11, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
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 September 11, 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 7,457,451 searches. Data last updated September 11, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$298 | Average$419 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$298 | Average$419 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$327 | Average$459 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$366 | Average$485 | FlexibilityNo cancel fee | On-time63% |