$329+ Cheap flights from St. Louis to Billings (STL - BIL)
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 10/17. Fares are subject to change and may not be available on all flights or dates of travel.
STL — BIL
Oct 8 — Oct 151
Round-trip
1 adult, Economy
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Find cheap flights from St. Louis to Billings 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 Billings
Cheapest
Best
Last-minute
Cheapest flights from St. Louis to BillingsExplore the most affordable flight options available from St. Louis to Billings. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 8, 2026.
Explore the most affordable flight options available from St. Louis to Billings. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 8, 2026.
This Delta deal was found by Cheapflights users on 9/3. 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.
Wed 12/27:08 am -
1 stop6h 12m
Sun 12/136:32 am -
1 stop7h 12m
Deal found 9/3![Delta logo]()
$329
This Delta deal was found by Cheapflights users on 9/3. 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.
Wed 12/27:08 am -
1 stop6h 12m
Fri 12/111:00 pm -
2 stops10h 05m
Deal found 9/3![Delta logo]()
$334
This Delta deal was found by Cheapflights users on 9/4. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/27:08 am -
1 stop6h 12m
Sat 12/125:40 am -
1 stop6h 56m
Deal found 9/4![Delta logo]()
$349
This Delta deal was found by Cheapflights users on 9/4. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/27:08 am -
1 stop6h 12m
Thu 12/101:00 pm -
2 stops9h 26m
Deal found 9/4![Delta logo]()
$354
This American Airlines deal was found by Cheapflights users on 9/4. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/1711:31 am -
2 stops10h 41m
Sat 10/316:00 am -
2 stops14h 13m
Deal found 9/4![American Airlines logo]()
$364
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 9/225:47 pm -
1 stop6h 28m
Sat 9/265:20 am -
1 stop7h 10m
Deal found 9/7![Delta logo]()
$399
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.
Tue 9/229:00 am -
1 stop5h 21m
Sat 9/265:00 am -
2 stops9h 43m
Deal found 9/7![United Airlines logo]()
$404
This American Airlines deal was found by Cheapflights users on 9/3. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/211:34 am -
2 stops10h 06m
Sat 12/127:00 am -
1 stop6h 04m
Deal found 9/3![American Airlines logo]()
$424
Best flights from St. Louis to BillingsDiscover carefully curated flight deals from St. Louis to Billings that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 8, 2026.
Discover carefully curated flight deals from St. Louis to Billings that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 8, 2026.
This United Airlines deal was found by Cheapflights users on 9/4. 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.
Sat 10/175:10 am -
1 stop5h 36m
Sat 10/317:00 am -
1 stop4h 38m
Deal found 9/4![United Airlines logo]()
$329
This Delta deal was found by Cheapflights users on 9/3. 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.
Wed 12/23:32 pm -
1 stop5h 16m
Sun 12/135:40 am -
2 stops10h 40m
Deal found 9/3![Delta logo]()
$334
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 9/225:47 pm -
1 stop6h 28m
Sat 9/265:20 am -
1 stop7h 10m
Deal found 9/7![Delta logo]()
$399
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 1/99:13 am -
1 stop7h 20m
Tue 1/122:42 pm -
1 stop5h 17m
Deal found 9/6![United Airlines logo]()
$439
This Delta deal was found by Cheapflights users on 9/3. 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.
Wed 12/210:18 am -
2 stops10h 30m
Thu 12/101:00 pm -
2 stops9h 26m
Deal found 9/3![Delta logo]()
$472
This United Airlines deal was found by Cheapflights users on 9/4. 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.
Mon 11/210:53 am -
2 stops11h 21m
Mon 11/162:42 pm -
1 stop5h 17m
Deal found 9/4![United Airlines logo]()
$474
Last-minute flights from St. Louis to BillingsDiscover last-minute flight deals from St. Louis to Billings. Data last updated September 8, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Billings. Data last updated September 8, 2026 and is based on user searches.
This United Airlines deal was found by Cheapflights users on 9/3. 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.
Fri 9/412:59 pm -
2 stops9h 01m
Sat 9/122:29 pm -
1 stop5h 09m
Deal found 9/3![United Airlines logo]()
$531
This American Airlines 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/93:34 pm -
1 stop7h 36m
Wed 9/1612:28 pm -
1 stop7h 16m
Deal found 9/5![American Airlines logo]()
$489
This United Airlines deal was found by Cheapflights users on 9/3. 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.
Fri 9/184:40 pm -
1 stop5h 20m
Tue 9/222:29 pm -
1 stop5h 09m
Deal found 9/3![United Airlines logo]()
$506
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 9/225:47 pm -
1 stop6h 28m
Sat 9/265:20 am -
1 stop7h 10m
Deal found 9/7![Delta logo]()
$399
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.
Tue 9/229:00 am -
1 stop5h 21m
Sat 9/265:00 am -
2 stops9h 43m
Deal found 9/7![United Airlines logo]()
$404
This Delta deal was found by Cheapflights users on 9/4. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/241:55 pm -
2 stops9h 39m
Sun 9/275:20 am -
1 stop7h 10m
Deal found 9/4![Delta logo]()
$509
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.
Thu 10/17:27 am -
1 stop5h 30m
Thu 10/151:21 pm -
2 stops9h 58m
Deal found 9/7![American Airlines logo]()
$545
This United Airlines deal was found by Cheapflights users on 9/4. 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.
Sat 10/175:10 am -
1 stop5h 36m
Sat 10/317:00 am -
1 stop4h 38m
Deal found 9/4![United Airlines logo]()
$329
This American Airlines deal was found by Cheapflights users on 9/4. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/1711:31 am -
2 stops10h 41m
Sat 10/316:00 am -
2 stops14h 13m
Deal found 9/4![American Airlines logo]()
$364
Find flight deals from St. Louis to Billings
Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) to Billings (BIL). 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 8, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $329 (Delta) |
Popular in | July |
Cheapest in | March |
Average price | $431 |
Cheapflights Fare Finder
Customize your flight search to find flights from St. Louis to Billings 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 8, 2026.
Use the filters below to find and compare flights from St. Louis to Billings that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
Quickest round-trip
St. LouisBillings
STL Lambert-St Louis - BIL Billings Logan Intl
STLBIL
Lambert-St Louis
Sat 10/17
5:10 am-9:46 am
1 stop5h 36m
Billings Logan Intl
Sat 10/31
7:00 am-12:38 pm
1 stop4h 38m
$329
St. LouisBillings
STL Lambert-St Louis - BIL Billings Logan Intl
STLBIL
Lambert-St Louis
Wed 12/2
3:32 pm-7:48 pm
1 stop5h 16m
Billings Logan Intl
Sun 12/13
5:40 am-5:20 pm
2 stops10h 40m
$334
St. LouisBillings
STL Lambert-St Louis - BIL Billings Logan Intl
STLBIL
Lambert-St Louis
Tue 9/22
5:47 pm-11:15 pm
1 stop6h 28m
Billings Logan Intl
Sat 9/26
5:20 am-1:30 pm
1 stop7h 10m
$399
St. LouisBillings
STL Lambert-St Louis - BIL Billings Logan Intl
STLBIL
Lambert-St Louis
Sat 1/9
9:13 am-3:33 pm
1 stop7h 20m
Billings Logan Intl
Tue 1/12
2:42 pm-8:59 pm
1 stop5h 17m
$439
St. LouisBillings
STL Lambert-St Louis - BIL Billings Logan Intl
STLBIL
Lambert-St Louis
Wed 12/2
10:18 am-7:48 pm
2 stops10h 30m
Billings Logan Intl
Thu 12/10
1:00 pm-11:26 pm
2 stops9h 26m
$472
St. LouisBillings
STL Lambert-St Louis - BIL Billings Logan Intl
STLBIL
Lambert-St Louis
Mon 11/2
10:53 am-9:14 pm
2 stops11h 21m
Billings Logan Intl
Mon 11/16
2:42 pm-8:59 pm
1 stop5h 17m
$474
Sorted by cheapest first
Compare providers for flights from St. Louis to Billings
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 Billings 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-Billings flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on St. Louis-Billings flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from St. Louis-Billings flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on St. Louis-Billings 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-Billings 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 Billings
Have a flexible travel schedule? Discover the best time to fly to Billings from St. Louis with our price prediction graph.
STL-BIL
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 Billings
Reviews of airlines servicing Billings
Get insights into the airlines that provide service to Billings. 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 Billings. Reviews last updated September 8, 2026.
Get a feel of what it's like to fly with Delta,United Airlines, andAmerican Airlines from St. Louis to Billings by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Boarding
8.1
Overall
7.8
Crew
8.5
Food
7.2
Entertainment
7.8
Comfort
7.8
Reviews
1 / 20
8.0
ExcellentJorge,Aug 2026
TPA - ATL
Boarding
8.1
Overall
7.8
Crew
8.5
Food
7.2
Entertainment
7.8
Comfort
7.8
Reviews
1 / 20
8.0
ExcellentJorge,Aug 2026
TPA - ATL
Boarding
8.1
Overall
7.8
Crew
8.5
Food
7.2
Entertainment
7.8
Comfort
7.8
Reviews
1 / 20
8.0
ExcellentJorge,Aug 2026
TPA - ATL
Boarding
8.1
Overall
7.8
Crew
8.5
Food
7.2
Entertainment
7.8
Comfort
7.8
Reviews
1 / 20
8.0
ExcellentJorge,Aug 2026
TPA - ATL
Related info for your journey
Find useful and relevant information for your journey from St. Louis to Billings. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
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Complete your trip
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Other flights to Billings
Explore flights to Billings departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on September 8, 2026.
Complete your trip
Complete your trip to Billings by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from St. Louis to Billings by cabin class
Find flights from St. Louis to Billings, based on your preferred cabin class, be it economy, premium economy, business, or first class.
St. Louis and Billings flights
Browse other St. Louis and Billings flight options. Last updated on September 8, 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 September 8, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Top 3 airlines flying from St. Louis to Billings
Discover the top 3 airlines that operate flights from St. Louis to Billings. 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 8, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$280 | Average$413 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$332 | Average$538 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$395 | Average$431 | FlexibilityNo cancel fee | On-time71% |