$421+ Cheap flights from Bellingham to St. Louis (BLI - STL)
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/21. Fares are subject to change and may not be available on all flights or dates of travel.
BLI — STL
Oct 2 — Oct 91
Round-trip
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
Find cheap flights from Bellingham to St. Louis 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 Bellingham to St. Louis
Cheapest
Best
Last-minute
Cheapest flights from Bellingham to St. LouisExplore the most affordable flight options available from Bellingham to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 2, 2026.
Explore the most affordable flight options available from Bellingham to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 2, 2026.
This Kiwi.com deal was found by Cheapflights users on 8/29. 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.
Mon 9/217:00 am -
1 stop26h 32m
Wed 9/232:29 pm -
2 stops25h 12m
Deal found 8/29![Multiple Airlines logo]()
$421
This Alaska Airlines deal was found by Cheapflights users on 8/30. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/262:17 pm -
1 stop7h 42m
Fri 10/304:42 pm -
1 stop9h 11m
Deal found 8/30![Alaska Airlines logo]()
$555
This Alaska Airlines deal was found by Cheapflights users on 8/31. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/167:26 pm -
1 stop16h 55m
Sun 9/207:36 pm -
1 stop6h 08m
Deal found 8/31![Alaska Airlines logo]()
$565
This Alaska Airlines deal was found by Cheapflights users on 8/29. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/217:26 pm -
2 stops19h 44m
Wed 9/236:08 pm -
2 stops26h 38m
Deal found 8/29![Alaska Airlines logo]()
$773
Best flights from Bellingham to St. LouisDiscover carefully curated flight deals from Bellingham to St. Louis that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 2, 2026.
Discover carefully curated flight deals from Bellingham to St. Louis that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 2, 2026.
This Kiwi.com deal was found by Cheapflights users on 8/29. 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.
Mon 9/217:00 am -
1 stop26h 32m
Wed 9/232:29 pm -
2 stops25h 12m
Deal found 8/29![Multiple Airlines logo]()
$421
This Alaska Airlines deal was found by Cheapflights users on 8/30. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/262:17 pm -
1 stop7h 42m
Fri 10/304:42 pm -
1 stop9h 11m
Deal found 8/30![Alaska Airlines logo]()
$555
This Alaska Airlines deal was found by Cheapflights users on 8/31. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/167:26 pm -
1 stop16h 55m
Sun 9/207:36 pm -
1 stop6h 08m
Deal found 8/31![Alaska Airlines logo]()
$565
Last-minute flights from Bellingham to St. LouisDiscover last-minute flight deals from Bellingham to St. Louis. Data last updated September 2, 2026 and is based on user searches.
Discover last-minute flight deals from Bellingham to St. Louis. Data last updated September 2, 2026 and is based on user searches.
This Alaska Airlines deal was found by Cheapflights users on 8/31. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/167:26 pm -
1 stop16h 55m
Sun 9/207:36 pm -
1 stop6h 08m
Deal found 8/31![Alaska Airlines logo]()
$565
This Kiwi.com deal was found by Cheapflights users on 8/29. 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.
Mon 9/217:00 am -
1 stop26h 32m
Wed 9/232:29 pm -
2 stops25h 12m
Deal found 8/29![Multiple Airlines logo]()
$421
This Alaska Airlines deal was found by Cheapflights users on 8/29. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/217:26 pm -
2 stops19h 44m
Wed 9/236:08 pm -
2 stops26h 38m
Deal found 8/29![Alaska Airlines logo]()
$773
This Alaska Airlines deal was found by Cheapflights users on 8/30. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/262:17 pm -
1 stop7h 42m
Fri 10/304:42 pm -
1 stop9h 11m
Deal found 8/30![Alaska Airlines logo]()
$555
Find flight deals from Bellingham to St. Louis
Discover tips and strategies to find the most affordable flight options for your journey from Bellingham (BLI) 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 September 2, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $421 (Kiwi.com) |
Cheapflights Fare Finder
Customize your flight search to find flights from Bellingham 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 7,457,451 searches. Data last updated September 2, 2026.
Use the filters below to find and compare flights from Bellingham to St. Louis that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
BellinghamSt. Louis
BLI Bellingham - STL Lambert-St Louis
BLISTL
Bellingham
Mon 9/21
7:00 am-11:32 am
1 stop26h 32m
Lambert-St Louis
Wed 9/23
2:29 pm-1:41 pm
2 stops25h 12m
$421
Quickest round-trip
BellinghamSt. Louis
BLI Bellingham - STL Lambert-St Louis
BLISTL
Bellingham
Mon 10/26
2:17 pm-11:59 pm
1 stop7h 42m
Lambert-St Louis
Fri 10/30
4:42 pm-11:53 pm
1 stop9h 11m
$555
BellinghamSt. Louis
BLI Bellingham - STL Lambert-St Louis
BLISTL
Bellingham
Wed 9/16
7:26 pm-2:21 pm
1 stop16h 55m
Lambert-St Louis
Sun 9/20
7:36 pm-11:44 pm
1 stop6h 08m
$565
Sorted by cheapest first
Compare providers for flights from Bellingham to St. Louis
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 Bellingham to St. Louis 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 Bellingham-St. Louis flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Bellingham-St. Louis flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Bellingham-St. Louis flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Bellingham-St. Louis 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 Bellingham-St. Louis 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 Bellingham to St. Louis
Have a flexible travel schedule? Discover the best time to fly to St. Louis from Bellingham with our price prediction graph.
BLI-STL
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.
Related info for your journey
Find useful and relevant information for your journey from Bellingham to St. Louis. 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 St. Louis?
Book flights to St. Louis if you plan to visit one of these locationsEdwardsville
Fairview Heights
O'Fallon
Fenton
Swansea
Eureka
Maryland Heights
Collinsville
Wentzville
Glencoe
Chesterfield
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
Complete your trip
Flights by cabin class
Other flight options
Other flights from Bellingham
Popular flights
St. Louis flight routes