$250+ Cheap flights from Billings to St. Louis (BIL - STL)
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 5/3. Fares are subject to change and may not be available on all flights or dates of travel.
BIL — STL
Apr 13 — Apr 201
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 March 14, 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 March 14, 2026.
This United Airlines deal was found by Cheapflights users on 3/12. 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 7/244:10 pm
BIL
- STL
1 stop6h 47m
United Airlines
Sun 8/25:41 pm
STL
- BIL
1 stop5h 34m
United Airlines
Deal found 3/12![United Airlines logo]()
$319
This Delta deal was found by Cheapflights users on 3/13. 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 4/35:15 am
BIL
- STL
1 stop7h 02m
Delta
Thu 4/96:12 pm
STL
- BIL
1 stop5h 17m
Delta
Deal found 3/13![Delta logo]()
$339
This United Airlines deal was found by Cheapflights users on 3/10. 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.
Wed 3/252:35 pm
BIL
- STL
1 stop5h 06m
United Airlines
Sun 3/295:15 am
STL
- BIL
1 stop5h 25m
United Airlines
Deal found 3/10![United Airlines logo]()
$349
This Alaska Airlines deal was found by Cheapflights users on 3/9. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/117:56 am
BIL
- STL
1 stop15h 03m
Alaska Airlines
Tue 4/143:50 pm
STL
- BIL
1 stop9h 08m
Alaska Airlines
Deal found 3/9![Alaska Airlines logo]()
$370
This Delta deal was found by Cheapflights users on 3/11. 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 4/15:15 am
BIL
- STL
1 stop7h 02m
Delta
Mon 4/66:12 pm
STL
- BIL
1 stop5h 17m
Delta
Deal found 3/11![Delta logo]()
$411
This Kiwi.com deal was found by Cheapflights users on 3/10. 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.
Mon 5/410:34 am
BIL
- STL
1 stop9h 26m
Multiple Airlines
Wed 5/68:13 pm
STL
- BIL
2 stops38h 01m
Multiple Airlines
Deal found 3/10![Multiple Airlines logo]()
$426
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 March 14, 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 March 14, 2026.
This United Airlines deal was found by Cheapflights users on 3/12. 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 7/244:10 pm
BIL
- STL
1 stop6h 47m
United Airlines
Sun 8/25:41 pm
STL
- BIL
1 stop5h 34m
United Airlines
Deal found 3/12![United Airlines logo]()
$319
This Alaska Airlines deal was found by Cheapflights users on 3/9. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/117:56 am
BIL
- STL
1 stop15h 03m
Alaska Airlines
Tue 4/143:50 pm
STL
- BIL
1 stop9h 08m
Alaska Airlines
Deal found 3/9![Alaska Airlines logo]()
$370
This Delta deal was found by Cheapflights users on 3/11. 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.
Mon 4/66:21 pm
BIL
- STL
1 stop5h 00m
Delta
Sun 4/126:12 pm
STL
- BIL
1 stop5h 17m
Delta
Deal found 3/11![Delta logo]()
$493
This United Airlines deal was found by Cheapflights users on 3/9. 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.
Wed 3/256:30 am
BIL
- STL
1 stop5h 49m
United Airlines
Sun 3/295:15 am
STL
- BIL
1 stop5h 25m
United Airlines
Deal found 3/9![United Airlines logo]()
$394
This United Airlines deal was found by Cheapflights users on 3/9. 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 4/112:35 pm
BIL
- STL
1 stop5h 19m
United Airlines
Tue 4/148:30 am
STL
- BIL
2 stops13h 27m
United Airlines
Deal found 3/9![United Airlines logo]()
$450
Last-minute flights from Billings to St. LouisDiscover last-minute flight deals from Billings to St. Louis. Data last updated March 14, 2026 and is based on user searches.
Discover last-minute flight deals from Billings to St. Louis. Data last updated March 14, 2026 and is based on user searches.
This United Airlines deal was found by Cheapflights users on 3/10. 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.
Wed 3/252:35 pm
BIL
- STL
1 stop5h 06m
United Airlines
Sun 3/295:15 am
STL
- BIL
1 stop5h 25m
United Airlines
Deal found 3/10![United Airlines logo]()
$349
This Delta deal was found by Cheapflights users on 3/11. 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 4/15:15 am
BIL
- STL
1 stop7h 02m
Delta
Mon 4/66:12 pm
STL
- BIL
1 stop5h 17m
Delta
Deal found 3/11![Delta logo]()
$411
This Delta deal was found by Cheapflights users on 3/13. 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 4/35:15 am
BIL
- STL
1 stop7h 02m
Delta
Thu 4/96:12 pm
STL
- BIL
1 stop5h 17m
Delta
Deal found 3/13![Delta logo]()
$339
This Delta deal was found by Cheapflights users on 3/11. 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.
Mon 4/66:21 pm
BIL
- STL
1 stop5h 00m
Delta
Sun 4/126:32 am
STL
- BIL
2 stops12h 09m
Delta
Deal found 3/11![Delta logo]()
$448
This Alaska Airlines deal was found by Cheapflights users on 3/9. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/117:56 am
BIL
- STL
1 stop15h 03m
Alaska Airlines
Tue 4/143:50 pm
STL
- BIL
1 stop9h 08m
Alaska Airlines
Deal found 3/9![Alaska Airlines logo]()
$370
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 March 14, 2026.
Search for one-way flight options from Billings to St. Louis. Find affordable one-way fares based on user searches. Data last updated March 14, 2026.
This Delta deal was found by Cheapflights users on 3/13. 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.
Sun 5/36:24 am
BIL
- STL
1 stop7h 05m
Delta
Deal found 3/13![Delta logo]()
$250
This Delta deal was found by Cheapflights users on 3/9. 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.
Sun 7/56:15 am
BIL
- STL
1 stop4h 15m
Delta
Deal found 3/9![Delta logo]()
$346
This United Airlines deal was found by Cheapflights users on 3/10. 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.
Mon 7/64:10 pm
BIL
- STL
1 stop6h 47m
United Airlines
Deal found 3/10![United Airlines logo]()
$348
This Delta deal was found by Cheapflights users on 3/9. 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.
Mon 7/66:25 pm
BIL
- STL
1 stop5h 11m
Delta
Deal found 3/9![Delta logo]()
$360
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 March 14, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $319 (United Airlines) |
One-way from | $250 (Delta) |
Popular in | November |
Cheapest in | August |
Average price | $710 |
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 2,558,603 searches. Data last updated March 14, 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 - STL
BILSTL
Billings Logan Intl
Fri 7/24
4:10 pm-11:57 pm
1 stop6h 47m
Lambert-St Louis
Sun 8/2
5:41 pm-10:15 pm
1 stop5h 34m
$319
BillingsSt. Louis
BIL - STL
BILSTL
Billings Logan Intl
Sat 4/11
7:56 am-11:59 pm
1 stop15h 03m
Lambert-St Louis
Tue 4/14
3:50 pm-11:58 pm
1 stop9h 08m
$370
BillingsSt. Louis
BIL - STL
BILSTL
Billings Logan Intl
Wed 3/25
6:30 am-1:19 pm
1 stop5h 49m
Lambert-St Louis
Sun 3/29
5:15 am-9:40 am
1 stop5h 25m
$394
BillingsSt. Louis
BIL - STL
BILSTL
Billings Logan Intl
Sat 4/11
2:35 pm-8:54 pm
1 stop5h 19m
Lambert-St Louis
Tue 4/14
8:30 am-8:57 pm
2 stops13h 27m
$450
Quickest round-trip
BillingsSt. Louis
BIL - STL
BILSTL
Billings Logan Intl
Mon 4/6
6:21 pm-12:21 am
1 stop5h 00m
Lambert-St Louis
Sun 4/12
6:12 pm-10:29 pm
1 stop5h 17m
$493
Cheapest one-way
BillingsSt. Louis
BIL - STL
BILSTL
Billings Logan Intl
Sun 5/3
6:24 am-2:29 pm
1 stop7h 05m
$250
BillingsSt. Louis
BIL - STL
BILSTL
Billings Logan Intl
Mon 7/6
4:10 pm-11:57 pm
1 stop6h 47m
$348
Quickest one-way
BillingsSt. Louis
BIL - STL
BILSTL
Billings Logan Intl
Sun 7/5
6:15 am-11:30 am
1 stop4h 15m
$356
BillingsSt. Louis
BIL - STL
BILSTL
Billings Logan Intl
Mon 7/6
6:25 pm-12:36 am
1 stop5h 11m
$360
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 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 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 March 14, 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.
Food
7.2
Overall
7.9
Crew
8.5
Boarding
8.1
Entertainment
7.8
Comfort
7.9
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Food
7.2
Overall
7.9
Crew
8.5
Boarding
8.1
Entertainment
7.8
Comfort
7.9
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Food
7.2
Overall
7.9
Crew
8.5
Boarding
8.1
Entertainment
7.8
Comfort
7.9
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - 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 locationsEdwardsville
O'Fallon
Fenton
Swansea
Fairview Heights
Maryland Heights
Collinsville
Eureka
Wentzville
Glencoe
Chesterfield
Alton
Farmington
Festus
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Complete your trip
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Billings and St. Louis flights
Browse other Billings and St. Louis flight options. Last updated on March 14, 2026.
Other flights from Billings
Browse through other flights departing from Billings. Flights are based on user searches made on Cheapflights and were last updated on March 14, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Other flights to St. Louis
Explore flights to St. Louis departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on March 14, 2026.
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 2,558,603 searches. Data last updated March 14, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$249 | Average$481 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$278 | Average$460 | FlexibilityNo cancel fee | On-timeN/A |