$294+ Cheap flights from Billings to St. Louis (BIL - 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 10/9. Fares are subject to change and may not be available on all flights or dates of travel.
BIL — STL
Oct 11 — Oct 181
Round-trip
1 adult, Economy
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Find cheap flights from Billings 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 Billings to St. Louis
Cheapest
Best
Last-minute
One-way
Cheapest flights from Billings to St. LouisExplore the most affordable flight options available from Billings to St. Louis. 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 Billings to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 11, 2026.
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/246:33 pm -
1 stop5h 11m
Mon 9/285:47 pm -
1 stop6h 28m
Deal found 9/9![Delta logo]()
$409
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 11/142:42 pm -
1 stop5h 17m
Tue 11/174:39 pm -
1 stop5h 35m
Deal found 9/10![United Airlines logo]()
$419
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/75:00 am -
1 stop6h 38m
Tue 11/108:50 am -
1 stop5h 39m
Deal found 9/6![United Airlines logo]()
$439
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.
Fri 9/254:00 pm -
1 stop6h 44m
Mon 9/284:39 pm -
1 stop7h 12m
Deal found 9/9![United Airlines logo]()
$479
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.
Fri 9/114:07 pm -
1 stop6h 33m
Tue 9/154:40 pm -
1 stop7h 11m
Deal found 9/10![United Airlines logo]()
$489
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/116:33 pm -
2 stops14h 01m
Tue 9/1511:21 am -
2 stops12h 13m
Deal found 9/10![Delta logo]()
$499
Best flights from Billings to St. LouisDiscover carefully curated flight deals from Billings to St. Louis 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 Billings to St. Louis 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 9/10. 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 11/142:42 pm -
1 stop5h 17m
Tue 11/174:39 pm -
1 stop5h 35m
Deal found 9/10![United Airlines logo]()
$419
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.
Sat 11/75:00 am -
1 stop6h 38m
Tue 11/108:50 am -
1 stop5h 39m
Deal found 9/8![United Airlines logo]()
$419
Last-minute flights from Billings to St. LouisDiscover last-minute flight deals from Billings to St. Louis. Data last updated September 11, 2026 and is based on user searches.
Discover last-minute flight deals from Billings to St. Louis. Data last updated September 11, 2026 and is based on user searches.
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.
Fri 9/114:07 pm -
1 stop6h 33m
Tue 9/154:40 pm -
1 stop7h 11m
Deal found 9/10![United Airlines logo]()
$489
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/116:33 pm -
2 stops14h 01m
Tue 9/1511:21 am -
2 stops12h 13m
Deal found 9/10![Delta logo]()
$499
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 9/237:00 am -
2 stops15h 38m
Sun 9/275:10 am -
1 stop5h 36m
Deal found 9/8![United Airlines logo]()
$525
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.
Wed 9/236:33 pm -
1 stop5h 11m
Sun 9/275:47 pm -
1 stop6h 28m
Deal found 9/8![Delta logo]()
$529
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/246:33 pm -
1 stop5h 11m
Mon 9/285:47 pm -
1 stop6h 28m
Deal found 9/9![Delta logo]()
$409
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.
Fri 9/254:00 pm -
1 stop6h 44m
Mon 9/284:39 pm -
1 stop7h 12m
Deal found 9/9![United Airlines logo]()
$479
This American 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/201:21 pm -
1 stop5h 27m
Thu 10/225:40 am -
1 stop8h 11m
Deal found 9/7![American Airlines logo]()
$555
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/206:16 am -
2 stops10h 59m
Thu 10/2210:35 am -
2 stops10h 40m
Deal found 9/7![Delta logo]()
$612
One-way flights from Billings to St. LouisSearch for one-way flight options from Billings to St. Louis. Find affordable one-way fares based on user searches. Data last updated September 11, 2026.
Search for one-way flight options from Billings to St. Louis. 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 9/10. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/910:22 pm -
3 stops47h 51m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/10![Multiple Airlines logo]()
$294
This Travelocity 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/97:32 pm -
1 stop19h 12m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/10![Alaska Airlines logo]()
$313
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.
Thu 9/174:07 pm -
1 stop6h 24m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/8![United Airlines logo]()
$418
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.
Thu 9/176:23 am -
2 stops8h 31m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/8![Delta logo]()
$423
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 9/173:42 pm -
3 stops45h 39m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/8![Multiple Airlines logo]()
$970
Find flight deals from Billings to St. Louis
Discover tips and strategies to find the most affordable flight options for your journey from Billings (BIL) 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 11, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $409 (Delta) |
One-way from | $294 (Kiwi.com) |
Cheapflights Fare Finder
Customize your flight search to find flights from Billings 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 11, 2026.
Use the filters below to find and compare flights from Billings to St. Louis that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
BillingsSt. Louis
BIL Billings Logan Intl - STL Lambert-St Louis
BILSTL
Billings Logan Intl
Fri 10/9
10:22 pm-11:13 pm
3 stops47h 51m
Lambert-St Louis
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$294
BillingsSt. Louis
BIL Billings Logan Intl - STL Lambert-St Louis
BILSTL
Billings Logan Intl
Fri 10/9
7:32 pm-3:44 pm
1 stop19h 12m
Lambert-St Louis
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$313
Quickest round-trip
BillingsSt. Louis
BIL Billings Logan Intl - STL Lambert-St Louis
BILSTL
Billings Logan Intl
Thu 9/17
4:07 pm-11:31 pm
1 stop6h 24m
Lambert-St Louis
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$418
BillingsSt. Louis
BIL Billings Logan Intl - STL Lambert-St Louis
BILSTL
Billings Logan Intl
Sat 11/14
2:42 pm-8:59 pm
1 stop5h 17m
Lambert-St Louis
Tue 11/17
4:39 pm-9:14 pm
1 stop5h 35m
$419
BillingsSt. Louis
BIL Billings Logan Intl - STL Lambert-St Louis
BILSTL
Billings Logan Intl
Sat 11/7
5:00 am-12:38 pm
1 stop6h 38m
Lambert-St Louis
Tue 11/10
8:50 am-1:29 pm
1 stop5h 39m
$419
BillingsSt. Louis
BIL Billings Logan Intl - STL Lambert-St Louis
BILSTL
Billings Logan Intl
Thu 9/17
6:23 am-3:54 pm
2 stops8h 31m
Lambert-St Louis
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$423
Sorted by cheapest first
Compare providers for flights from Billings 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 Billings 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 Billings-St. Louis flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Billings-St. Louis flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Billings-St. Louis flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Billings-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 Billings-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 Billings to St. Louis
Have a flexible travel schedule? Discover the best time to fly to St. Louis from Billings with our price prediction graph.
BIL-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.
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 September 11, 2026.
Peruse reviews from past customers who have flown with Delta and United Airlines from Billings to St. Louis to help guide your decision. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Overall
7.8
Entertainment
7.8
Food
7.2
Comfort
7.8
Boarding
8.1
Crew
8.5
Reviews
1 / 20
8.0
ExcellentJorge,Aug 2026
TPA - ATL
Overall
7.8
Entertainment
7.8
Food
7.2
Comfort
7.8
Boarding
8.1
Crew
8.5
Reviews
1 / 20
8.0
ExcellentJorge,Aug 2026
TPA - ATL
Overall
7.8
Entertainment
7.8
Food
7.2
Comfort
7.8
Boarding
8.1
Crew
8.5
Reviews
1 / 20
8.0
ExcellentJorge,Aug 2026
TPA - ATL
Related info for your journey
Find useful and relevant information for your journey from Billings 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 locationsFairview Heights
O'Fallon
Fenton
Swansea
Eureka
Maryland Heights
Collinsville
Wentzville
Edwardsville
Glencoe
Chesterfield
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Billings and St. Louis flights
Browse other Billings and St. Louis flight options. Last updated on September 11, 2026.
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Top 2 airlines flying from Billings to St. Louis
Discover the top 2 airlines that operate flights from Billings 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 7,457,451 searches. Data last updated September 11, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$278 | Average$388 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$279 | Average$472 | FlexibilityNo cancel fee | On-time69% |