$220+ Cheap flights from St. Louis to Missoula (STL - MSO)
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 9/25. Fares are subject to change and may not be available on all flights or dates of travel.
STL — MSO
Sep 11 — Sep 181
Round-trip
1 adult, Economy
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Find cheap flights from St. Louis to Missoula 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 Missoula
Cheapest
Best
Last-minute
One-way
Cheapest flights from St. Louis to MissoulaExplore the most affordable flight options available from St. Louis to Missoula. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 12, 2026.
Explore the most affordable flight options available from St. Louis to Missoula. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 12, 2026.
This Delta deal was found by Cheapflights users on 8/9. 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.
Wed 11/2512:28 pm -
1 stop8h 29m
Tue 12/16:28 pm -
1 stop5h 12m
Deal found 8/9![Delta logo]()
$441
This Kiwi.com deal was found by Cheapflights users on 8/12. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/238:10 pm -
2 stops25h 49m
Sun 9/279:49 pm -
1 stop12h 28m
Deal found 8/12![Multiple Airlines logo]()
$448
This Alaska Airlines deal was found by Cheapflights users on 8/10. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/37:00 am -
1 stop9h 27m
Sat 11/77:03 am -
1 stop7h 18m
Deal found 8/10![Alaska Airlines logo]()
$455
This Delta deal was found by Cheapflights users on 8/10. 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.
Wed 9/95:00 pm -
1 stop8h 18m
Wed 9/166:17 pm -
1 stop5h 27m
Deal found 8/10![Delta logo]()
$461
This Alaska Airlines deal was found by Cheapflights users on 8/11. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/93:19 pm -
1 stop8h 42m
Tue 9/154:16 pm -
1 stop21h 05m
Deal found 8/11![Alaska Airlines logo]()
$465
This Alaska Airlines deal was found by Cheapflights users on 8/8. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/186:08 pm -
1 stop20h 17m
Fri 9/254:16 pm -
1 stop6h 43m
Deal found 8/8![Alaska Airlines logo]()
$469
This American Airlines deal was found by Cheapflights users on 8/11. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/237:29 am -
1 stop6h 06m
Mon 10/261:48 pm -
1 stop6h 09m
Deal found 8/11![American Airlines logo]()
$475
This United Airlines deal was found by Cheapflights users on 8/11. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/101:08 pm -
2 stops9h 39m
Sun 11/156:15 am -
1 stop5h 23m
Deal found 8/11![United Airlines logo]()
$480
This United Airlines deal was found by Cheapflights users on 8/10. 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 9/91:36 pm -
2 stops9h 54m
Wed 9/165:17 pm -
1 stop5h 23m
Deal found 8/10![United Airlines logo]()
$488
Best flights from St. Louis to MissoulaDiscover carefully curated flight deals from St. Louis to Missoula that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 12, 2026.
Discover carefully curated flight deals from St. Louis to Missoula that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 12, 2026.
This Alaska Airlines deal was found by Cheapflights users on 8/10. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/37:00 am -
1 stop9h 27m
Sat 11/77:03 am -
1 stop7h 18m
Deal found 8/10![Alaska Airlines logo]()
$455
This United Airlines deal was found by Cheapflights users on 8/11. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/101:08 pm -
2 stops9h 39m
Sun 11/156:15 am -
1 stop5h 23m
Deal found 8/11![United Airlines logo]()
$480
This Alaska Airlines deal was found by Cheapflights users on 8/7. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 1/263:24 pm -
1 stop9h 35m
Sat 1/306:40 am -
1 stop6h 46m
Deal found 8/7![Alaska Airlines logo]()
$455
This United Airlines deal was found by Cheapflights users on 8/8. 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 9/111:36 pm -
2 stops9h 54m
Sun 9/206:15 am -
1 stop5h 25m
Deal found 8/8![United Airlines logo]()
$501
This Alaska Airlines deal was found by Cheapflights users on 8/9. 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.
Wed 9/93:19 pm -
1 stop8h 42m
Tue 9/157:00 am -
2 stops33h 10m
Deal found 8/9![Alaska Airlines logo]()
$497
This United Airlines deal was found by Cheapflights users on 8/8. 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 11/37:30 am -
2 stops9h 56m
Sat 11/72:37 pm -
2 stops7h 47m
Deal found 8/8![United Airlines logo]()
$556
This Booking.com deal was found by Cheapflights users on 8/11. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/234:42 pm -
2 stops21h 44m
Mon 10/263:49 pm -
1 stop7h 10m
Deal found 8/11![Alaska Airlines logo]()
$533
This United Airlines deal was found by Cheapflights users on 8/8. 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 8/271:36 pm -
2 stops9h 54m
Sun 8/302:40 pm -
1 stop7h 51m
Deal found 8/8![United Airlines logo]()
$643
This Alaska Airlines deal was found by Cheapflights users on 8/11. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/106:02 am -
2 stops16h 23m
Sun 11/154:17 pm -
2 stops16h 13m
Deal found 8/11![Alaska Airlines logo]()
$612
Last-minute flights from St. Louis to MissoulaDiscover last-minute flight deals from St. Louis to Missoula. Data last updated August 12, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Missoula. Data last updated August 12, 2026 and is based on user searches.
This Delta deal was found by Cheapflights users on 8/10. 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.
Wed 9/95:00 pm -
1 stop8h 18m
Wed 9/166:17 pm -
1 stop5h 27m
Deal found 8/10![Delta logo]()
$461
This Alaska Airlines deal was found by Cheapflights users on 8/11. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/93:19 pm -
1 stop8h 42m
Tue 9/154:16 pm -
1 stop21h 05m
Deal found 8/11![Alaska Airlines logo]()
$465
This United Airlines deal was found by Cheapflights users on 8/10. 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 9/91:36 pm -
2 stops9h 54m
Wed 9/165:17 pm -
1 stop5h 23m
Deal found 8/10![United Airlines logo]()
$488
This United Airlines deal was found by Cheapflights users on 8/8. 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 9/111:36 pm -
2 stops9h 54m
Sun 9/206:15 am -
1 stop5h 25m
Deal found 8/8![United Airlines logo]()
$501
This Kiwi.com deal was found by Cheapflights users on 8/9. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/1712:17 pm -
1 stop9h 42m
Sun 9/209:49 pm -
1 stop12h 28m
Deal found 8/9![Multiple Airlines logo]()
$500
This Alaska Airlines deal was found by Cheapflights users on 8/8. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/186:08 pm -
1 stop20h 17m
Fri 9/254:16 pm -
1 stop6h 43m
Deal found 8/8![Alaska Airlines logo]()
$469
This Kiwi.com deal was found by Cheapflights users on 8/12. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/238:10 pm -
2 stops25h 49m
Sun 9/279:49 pm -
1 stop12h 28m
Deal found 8/12![Multiple Airlines logo]()
$448
One-way flights from St. Louis to MissoulaSearch for one-way flight options from St. Louis to Missoula. Find affordable one-way fares based on user searches. Data last updated August 12, 2026.
Search for one-way flight options from St. Louis to Missoula. Find affordable one-way fares based on user searches. Data last updated August 12, 2026.
This Kiwi.com deal was found by Cheapflights users on 8/12. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/252:29 pm -
3 stops52h 46m
Deal found 8/12![Multiple Airlines logo]()
$220
This Priceline deal was found by Cheapflights users on 8/12. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/256:29 am -
1 stop9h 48m
Deal found 8/12![Alaska Airlines logo]()
$245
This Kiwi.com deal was found by Cheapflights users on 8/7. 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.
Tue 12/293:52 pm -
1 stop18h 45m
Deal found 8/7![Multiple Airlines logo]()
$404
This Delta deal was found by Cheapflights users on 8/7. 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 12/2911:51 am -
2 stops9h 21m
Deal found 8/7![Delta logo]()
$633
Find flight deals from St. Louis to Missoula
Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) to Missoula (MSO). 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 August 12, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $441 (Delta) |
One-way from | $220 (Kiwi.com) |
Popular in | July |
Cheapest in | March |
Average price | $515 |
Cheapflights Fare Finder
Customize your flight search to find flights from St. Louis to Missoula 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 August 12, 2026.
Use the filters below to find and compare flights from St. Louis to Missoula that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
St. LouisMissoula
STL Lambert-St Louis - MSO Missoula Johnson-Bell Field
STLMSO
Lambert-St Louis
Tue 11/3
7:00 am-3:27 pm
1 stop9h 27m
Missoula Johnson-Bell Field
Sat 11/7
7:03 am-3:21 pm
1 stop7h 18m
$455
St. LouisMissoula
STL Lambert-St Louis - MSO Missoula Johnson-Bell Field
STLMSO
Lambert-St Louis
Tue 1/26
3:24 pm-11:59 pm
1 stop9h 35m
Missoula Johnson-Bell Field
Sat 1/30
6:40 am-2:26 pm
1 stop6h 46m
$455
Quickest round-trip
St. LouisMissoula
STL Lambert-St Louis - MSO Missoula Johnson-Bell Field
STLMSO
Lambert-St Louis
Tue 11/10
1:08 pm-9:47 pm
2 stops9h 39m
Missoula Johnson-Bell Field
Sun 11/15
6:15 am-12:38 pm
1 stop5h 23m
$480
St. LouisMissoula
STL Lambert-St Louis - MSO Missoula Johnson-Bell Field
STLMSO
Lambert-St Louis
Wed 9/9
3:19 pm-11:01 pm
1 stop8h 42m
Missoula Johnson-Bell Field
Tue 9/15
7:00 am-5:10 pm
2 stops33h 10m
$497
St. LouisMissoula
STL Lambert-St Louis - MSO Missoula Johnson-Bell Field
STLMSO
Lambert-St Louis
Fri 9/11
1:36 pm-10:30 pm
2 stops9h 54m
Missoula Johnson-Bell Field
Sun 9/20
6:15 am-12:40 pm
1 stop5h 25m
$501
St. LouisMissoula
STL Lambert-St Louis - MSO Missoula Johnson-Bell Field
STLMSO
Lambert-St Louis
Fri 10/23
4:42 pm-1:26 pm
2 stops21h 44m
Missoula Johnson-Bell Field
Mon 10/26
3:49 pm-11:59 pm
1 stop7h 10m
$533
St. LouisMissoula
STL Lambert-St Louis - MSO Missoula Johnson-Bell Field
STLMSO
Lambert-St Louis
Tue 11/3
7:30 am-4:26 pm
2 stops9h 56m
Missoula Johnson-Bell Field
Sat 11/7
2:37 pm-11:24 pm
2 stops7h 47m
$556
St. LouisMissoula
STL Lambert-St Louis - MSO Missoula Johnson-Bell Field
STLMSO
Lambert-St Louis
Tue 11/10
6:02 am-9:25 pm
2 stops16h 23m
Missoula Johnson-Bell Field
Sun 11/15
4:17 pm-9:30 am
2 stops16h 13m
$612
St. LouisMissoula
STL Lambert-St Louis - MSO Missoula Johnson-Bell Field
STLMSO
Lambert-St Louis
Thu 8/27
1:36 pm-10:30 pm
2 stops9h 54m
Missoula Johnson-Bell Field
Sun 8/30
2:40 pm-11:31 pm
1 stop7h 51m
$643
Cheapest one-way
St. LouisMissoula
STL Lambert-St Louis - MSO Missoula Johnson-Bell Field
STLMSO
Lambert-St Louis
Fri 9/25
2:29 pm-6:15 pm
3 stops52h 46m
$220
Showing 1-10 of 13 resultsSorted by cheapest first
Compare providers for flights from St. Louis to Missoula
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 Missoula in August.
| 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-Missoula flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on St. Louis-Missoula flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from St. Louis-Missoula flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on St. Louis-Missoula 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-Missoula 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 Missoula
Have a flexible travel schedule? Discover the best time to fly to Missoula from St. Louis with our price prediction graph.
STL-MSO
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 Missoula
Reviews of airlines servicing Missoula
Get insights into the airlines that provide service to Missoula. 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 Missoula. Reviews last updated August 12, 2026.
See what other customers who have flown with Delta and United Airlines from St. Louis to Missoula have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Food
7.2
Overall
7.8
Crew
8.5
Entertainment
7.8
Comfort
7.8
Boarding
8.1
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Food
7.2
Overall
7.8
Crew
8.5
Entertainment
7.8
Comfort
7.8
Boarding
8.1
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Food
7.2
Overall
7.8
Crew
8.5
Entertainment
7.8
Comfort
7.8
Boarding
8.1
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Related info for your journey
Find useful and relevant information for your journey from St. Louis to Missoula. 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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Other flights to Missoula
Explore flights to Missoula departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on August 12, 2026.
St. Louis and Missoula flights
Browse other St. Louis and Missoula flight options. Last updated on August 12, 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 August 12, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Top 2 airlines flying from St. Louis to Missoula
Discover the top 2 airlines that operate flights from St. Louis to Missoula. 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 August 12, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$179 | Average$448 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$257 | Average$490 | FlexibilityNo cancel fee | On-time69% |