$179+ 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 8/4. Fares are subject to change and may not be available on all flights or dates of travel.
STL — MSO
Jul 27 — Aug 31
Round-trip
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
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 June 27, 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 June 27, 2026.
This Kiwi.com deal was found by Cheapflights users on 6/22. 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 8/127:03 pm
STL
- MSO
1 stop15h 31m
Multiple Airlines
Sun 8/1610:24 am
MSO
- STL
2 stops21h 33m
Multiple Airlines
Deal found 6/22![Multiple Airlines logo]()
$409
This Alaska Airlines deal was found by Cheapflights users on 6/22. 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 10/277:00 am
STL
- MSO
1 stop8h 50m
Alaska Airlines
Wed 10/282:06 pm
MSO
- STL
1 stop8h 53m
Alaska Airlines
Deal found 6/22![Alaska Airlines logo]()
$431
This Delta deal was found by Cheapflights users on 6/23. 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 8/47:45 pm
STL
- MSO
1 stop5h 33m
Delta
Wed 8/125:30 am
MSO
- STL
1 stop7h 08m
Delta
Deal found 6/23![Delta logo]()
$472
This United Airlines deal was found by Cheapflights users on 6/22. 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 10/271:08 pm
STL
- MSO
2 stops9h 27m
United Airlines
Wed 10/282:27 pm
MSO
- STL
1 stop5h 07m
United Airlines
Deal found 6/22![United Airlines logo]()
$526
This Delta deal was found by Cheapflights users on 6/23. 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 6/255:36 pm
STL
- MSO
1 stop7h 08m
Delta
Wed 7/16:29 pm
MSO
- STL
1 stop5h 14m
Delta
Deal found 6/23![Delta logo]()
$549
This United Airlines deal was found by Cheapflights users on 6/24. 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 10/317:33 am
STL
- MSO
2 stops15h 02m
United Airlines
Wed 11/42:27 pm
MSO
- STL
1 stop5h 07m
United Airlines
Deal found 6/24![United Airlines logo]()
$553
This Kiwi.com deal was found by Cheapflights users on 6/22. 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 7/227:03 pm
STL
- MSO
1 stop15h 31m
Multiple Airlines
Sun 7/2610:24 am
MSO
- STL
2 stops21h 33m
Multiple Airlines
Deal found 6/22![Multiple Airlines logo]()
$557
This United Airlines deal was found by Cheapflights users on 6/23. 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 8/45:10 am
STL
- MSO
1 stop5h 45m
United Airlines
Wed 8/126:15 am
MSO
- STL
2 stops14h 45m
United Airlines
Deal found 6/23![United Airlines logo]()
$577
This United Airlines deal was found by Cheapflights users on 6/24. 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.
Sun 8/26:00 am
STL
- MSO
1 stop6h 32m
United Airlines
Wed 8/55:20 pm
MSO
- STL
1 stop5h 37m
United Airlines
Deal found 6/24![United Airlines logo]()
$586
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 June 27, 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 June 27, 2026.
This Alaska Airlines deal was found by Cheapflights users on 6/22. 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.
Thu 8/278:00 am
STL
- MSO
2 stops15h 59m
Alaska Airlines
Sun 8/307:15 am
MSO
- STL
2 stops12h 21m
Alaska Airlines
Deal found 6/22![Alaska Airlines logo]()
$624
This United Airlines deal was found by Cheapflights users on 6/25. 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 7/1110:20 am
STL
- MSO
2 stops14h 36m
United Airlines
Sat 7/187:15 am
MSO
- STL
2 stops12h 28m
United Airlines
Deal found 6/25![United Airlines logo]()
$673
This Delta deal was found by Cheapflights users on 6/23. 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 7/95:36 pm
STL
- MSO
1 stop7h 08m
Delta
Mon 7/136:27 pm
MSO
- STL
1 stop5h 14m
Delta
Deal found 6/23![Delta logo]()
$866
This United Airlines deal was found by Cheapflights users on 6/23. 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 7/225:10 am
STL
- MSO
1 stop5h 45m
United Airlines
Sat 7/255:20 pm
MSO
- STL
1 stop5h 27m
United Airlines
Deal found 6/23![United Airlines logo]()
$796
This Alaska Airlines deal was found by Cheapflights users on 6/24. 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 7/66:02 am
STL
- MSO
1 stop11h 07m
Alaska Airlines
Sun 7/127:00 am
MSO
- STL
1 stop10h 57m
Alaska Airlines
Deal found 6/24![Alaska Airlines logo]()
$814
This Alaska Airlines deal was found by Cheapflights users on 6/25. 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.
Thu 7/96:02 am
STL
- MSO
1 stop17h 53m
Alaska Airlines
Mon 7/137:59 pm
MSO
- STL
1 stop16h 53m
Alaska Airlines
Deal found 6/25![Alaska Airlines logo]()
$846
This United Airlines deal was found by Cheapflights users on 6/26. 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 7/94:48 pm
STL
- MSO
1 stop5h 51m
United Airlines
Mon 7/135:20 pm
MSO
- STL
1 stop5h 37m
United Airlines
Deal found 6/26![United Airlines logo]()
$875
Last-minute flights from St. Louis to MissoulaDiscover last-minute flight deals from St. Louis to Missoula. Data last updated June 27, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Missoula. Data last updated June 27, 2026 and is based on user searches.
This Alaska Airlines deal was found by Cheapflights users on 6/26. 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 6/272:50 pm
STL
- MSO
1 stop10h 06m
Alaska Airlines
Sun 7/57:03 am
MSO
- STL
1 stop10h 54m
Alaska Airlines
Deal found 6/26![Alaska Airlines logo]()
$684
This Alaska Airlines deal was found by Cheapflights users on 6/21. 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 6/297:56 pm
STL
- MSO
1 stop15h 46m
Alaska Airlines
Fri 7/37:03 am
MSO
- STL
1 stop10h 54m
Alaska Airlines
Deal found 6/21![Alaska Airlines logo]()
$606
This United Airlines deal was found by Cheapflights users on 6/21. 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 6/295:10 am
STL
- MSO
1 stop5h 45m
United Airlines
Fri 7/37:15 am
MSO
- STL
2 stops15h 14m
United Airlines
Deal found 6/21![United Airlines logo]()
$644
This Delta deal was found by Cheapflights users on 6/25. 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 7/17:55 pm
STL
- MSO
1 stop5h 33m
Delta
Wed 7/86:27 pm
MSO
- STL
1 stop5h 14m
Delta
Deal found 6/25![Delta logo]()
$624
This Alaska Airlines deal was found by Cheapflights users on 6/25. 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 7/117:56 pm
STL
- MSO
1 stop15h 46m
Alaska Airlines
Sat 7/185:41 pm
MSO
- STL
2 stops13h 56m
Alaska Airlines
Deal found 6/25![Alaska Airlines logo]()
$666
This United Airlines deal was found by Cheapflights users on 6/25. 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 7/115:10 am
STL
- MSO
1 stop5h 45m
United Airlines
Sat 7/187:15 am
MSO
- STL
2 stops12h 28m
United Airlines
Deal found 6/25![United Airlines logo]()
$668
This Kiwi.com deal was found by Cheapflights users on 6/22. 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 7/227:03 pm
STL
- MSO
1 stop15h 31m
Multiple Airlines
Sun 7/2610:24 am
MSO
- STL
2 stops21h 33m
Multiple Airlines
Deal found 6/22![Multiple Airlines logo]()
$557
This Orbitz deal was found by Cheapflights users on 6/24. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/267:56 pm
STL
- MSO
1 stop15h 46m
Alaska Airlines
Wed 7/297:59 pm
MSO
- STL
1 stop16h 53m
Alaska Airlines
Deal found 6/24![Alaska Airlines logo]()
$655
This United Airlines deal was found by Cheapflights users on 6/24. 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.
Sun 7/265:10 am
STL
- MSO
1 stop5h 45m
United Airlines
Wed 7/297:15 am
MSO
- STL
2 stops12h 28m
United Airlines
Deal found 6/24![United Airlines logo]()
$696
This Expedia deal was found by Cheapflights users on 6/24. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/277:56 pm
STL
- MSO
1 stop15h 46m
Alaska Airlines
Thu 7/305:41 pm
MSO
- STL
1 stop21h 56m
Alaska Airlines
Deal found 6/24![Alaska Airlines logo]()
$591
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 June 27, 2026.
Search for one-way flight options from St. Louis to Missoula. Find affordable one-way fares based on user searches. Data last updated June 27, 2026.
This Kiwi.com deal was found by Cheapflights users on 6/26. 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 8/46:34 pm
STL
- MSO
3 stops40h 00m
Multiple Airlines
Deal found 6/26![Multiple Airlines logo]()
$179
This Delta deal was found by Cheapflights users on 6/26. 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 8/47:45 pm
STL
- MSO
1 stop5h 33m
Delta
Deal found 6/26![Delta logo]()
$216
This United Airlines deal was found by Cheapflights users on 6/26. 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 8/44:48 pm
STL
- MSO
1 stop5h 51m
United Airlines
Deal found 6/26![United Airlines logo]()
$259
This Delta deal was found by Cheapflights users on 6/22. 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 7/197:55 pm
STL
- MSO
1 stop5h 33m
Delta
Deal found 6/22![Delta logo]()
$296
This Alaska Airlines deal was found by Cheapflights users on 6/25. 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 7/187:56 pm
STL
- MSO
1 stop15h 46m
Alaska Airlines
Deal found 6/25![Alaska Airlines logo]()
$301
This United Airlines deal was found by Cheapflights users on 6/26. 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.
Sun 7/195:10 am
STL
- MSO
1 stop5h 45m
United Airlines
Deal found 6/26![United Airlines logo]()
$311
This United Airlines deal was found by Cheapflights users on 6/25. 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 7/181:38 pm
STL
- MSO
2 stops11h 18m
United Airlines
Deal found 6/25![United Airlines logo]()
$337
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 June 27, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $409 (Kiwi.com) |
One-way from | $179 (Kiwi.com) |
Popular in | July |
Cheapest in | March |
Average price | $423 |
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 June 27, 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 - MSO
STLMSO
Lambert-St Louis
Thu 8/27
8:00 am-10:59 pm
2 stops15h 59m
Missoula Johnson-Bell Field
Sun 8/30
7:15 am-8:36 pm
2 stops12h 21m
$624
St. LouisMissoula
STL - MSO
STLMSO
Lambert-St Louis
Sat 7/11
10:20 am-11:56 pm
2 stops14h 36m
Missoula Johnson-Bell Field
Sat 7/18
7:15 am-8:43 pm
2 stops12h 28m
$673
Quickest round-trip
St. LouisMissoula
STL - MSO
STLMSO
Lambert-St Louis
Wed 7/22
5:10 am-9:55 am
1 stop5h 45m
Missoula Johnson-Bell Field
Sat 7/25
5:20 pm-11:47 pm
1 stop5h 27m
$796
St. LouisMissoula
STL - MSO
STLMSO
Lambert-St Louis
Mon 7/6
6:02 am-4:09 pm
1 stop11h 07m
Missoula Johnson-Bell Field
Sun 7/12
7:00 am-6:57 pm
1 stop10h 57m
$814
St. LouisMissoula
STL - MSO
STLMSO
Lambert-St Louis
Thu 7/9
6:02 am-10:55 pm
1 stop17h 53m
Missoula Johnson-Bell Field
Mon 7/13
7:59 pm-1:52 pm
1 stop16h 53m
$846
St. LouisMissoula
STL - MSO
STLMSO
Lambert-St Louis
Thu 7/9
5:36 pm-11:44 pm
1 stop7h 08m
Missoula Johnson-Bell Field
Mon 7/13
6:27 pm-12:41 am
1 stop5h 14m
$866
St. LouisMissoula
STL - MSO
STLMSO
Lambert-St Louis
Thu 7/9
4:48 pm-9:39 pm
1 stop5h 51m
Missoula Johnson-Bell Field
Mon 7/13
5:20 pm-11:57 pm
1 stop5h 37m
$875
Cheapest one-way
St. LouisMissoula
STL - MSO
STLMSO
Lambert-St Louis
Tue 8/4
6:34 pm-9:34 am
3 stops40h 00m
$179
Quickest one-way
St. LouisMissoula
STL - MSO
STLMSO
Lambert-St Louis
Sun 7/19
7:55 pm-12:28 am
1 stop5h 33m
$296
St. LouisMissoula
STL - MSO
STLMSO
Lambert-St Louis
Sat 7/18
7:56 pm-10:42 am
1 stop15h 46m
$301
Showing 1-10 of 12 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 June.
| 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 June 27, 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.
Overall
7.8
Food
7.2
Entertainment
7.8
Comfort
7.8
Boarding
8.1
Crew
8.5
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Overall
7.8
Food
7.2
Entertainment
7.8
Comfort
7.8
Boarding
8.1
Crew
8.5
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Overall
7.8
Food
7.2
Entertainment
7.8
Comfort
7.8
Boarding
8.1
Crew
8.5
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.
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
Missoula flight routes
Other flight options
Other flights from St. Louis
Popular flights
Alternative routes for St. Louis to Missoula
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to Missoula by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from St. Louis to Missoula by cabin class
Find flights from St. Louis to Missoula, based on your preferred cabin class, be it economy, premium economy, business, or first class.
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 June 27, 2026.
St. Louis and Missoula flights
Browse other St. Louis and Missoula flight options. Last updated on June 27, 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 June 27, 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 June 27, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$179 | Average$390 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$257 | Average$490 | FlexibilityNo cancel fee | On-time69% |