$155+ Cheap flights from Missoula to St. Louis (MSO - 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 6/20. Fares are subject to change and may not be available on all flights or dates of travel.
MSO — STL
Apr 9 — Apr 161
Round-trip
1 adult, Economy
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Find cheap flights from Missoula 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 Missoula to St. Louis
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Cheapest flights from Missoula to St. LouisExplore the most affordable flight options available from Missoula to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 10, 2026.
Explore the most affordable flight options available from Missoula to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 10, 2026.
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 4/253:55 pm
MSO
- STL
1 stop7h 04m
Alaska Airlines
Wed 4/297:00 am
STL
- MSO
1 stop8h 59m
Alaska Airlines
Deal found 3/9![Alaska Airlines logo]()
$297
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.
Wed 9/234:13 pm
MSO
- STL
1 stop6h 46m
Alaska Airlines
Mon 9/286:41 am
STL
- MSO
1 stop9h 42m
Alaska Airlines
Deal found 3/9![Alaska Airlines logo]()
$309
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.
Wed 9/236:35 am
MSO
- STL
1 stop6h 51m
Alaska Airlines
Sun 9/273:24 pm
STL
- MSO
1 stop9h 55m
Alaska Airlines
Deal found 3/9![Alaska Airlines logo]()
$321
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.
Tue 7/285:20 pm
MSO
- STL
1 stop5h 37m
United Airlines
Sun 8/95:10 am
STL
- MSO
1 stop5h 45m
United Airlines
Deal found 3/10![United Airlines logo]()
$329
This Alaska Airlines deal was found by Cheapflights users on 3/5. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/187:00 am
MSO
- STL
1 stop7h 24m
Alaska Airlines
Wed 4/227:00 am
STL
- MSO
1 stop8h 59m
Alaska Airlines
Deal found 3/5![Alaska Airlines logo]()
$333
This Delta deal was found by Cheapflights users on 3/6. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/233:27 pm
MSO
- STL
1 stop6h 34m
Delta
Mon 9/282:18 pm
STL
- MSO
2 stops11h 06m
Delta
Deal found 3/6![Delta logo]()
$339
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.
Thu 6/46:05 pm
MSO
- STL
1 stop5h 25m
Delta
Mon 6/86:59 pm
STL
- MSO
1 stop6h 25m
Delta
Deal found 3/9![Delta logo]()
$359
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.
Fri 7/35:45 am
MSO
- STL
1 stop4h 45m
Delta
Fri 7/36:59 pm
STL
- MSO
1 stop6h 25m
Delta
Deal found 3/9![Delta logo]()
$369
This United Airlines deal was found by Cheapflights users on 3/8. 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 4/252:38 pm
MSO
- STL
1 stop5h 16m
United Airlines
Wed 4/299:10 am
STL
- MSO
2 stops13h 20m
United Airlines
Deal found 3/8![United Airlines logo]()
$382
This United Airlines deal was found by Cheapflights users on 3/5. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/182:38 pm
MSO
- STL
1 stop5h 16m
United Airlines
Wed 4/229:10 am
STL
- MSO
2 stops13h 20m
United Airlines
Deal found 3/5![United Airlines logo]()
$394
Best flights from Missoula to St. LouisDiscover carefully curated flight deals from Missoula to St. Louis that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated March 10, 2026.
Discover carefully curated flight deals from Missoula to St. Louis that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated March 10, 2026.
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 4/253:55 pm
MSO
- STL
1 stop7h 04m
Alaska Airlines
Wed 4/297:00 am
STL
- MSO
1 stop8h 59m
Alaska Airlines
Deal found 3/9![Alaska Airlines logo]()
$297
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.
Fri 7/35:45 am
MSO
- STL
1 stop4h 45m
Delta
Fri 7/36:59 pm
STL
- MSO
1 stop6h 25m
Delta
Deal found 3/9![Delta logo]()
$369
This United Airlines deal was found by Cheapflights users on 3/7. 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.
Sat 4/252:38 pm
MSO
- STL
1 stop5h 16m
United Airlines
Wed 4/299:10 am
STL
- MSO
2 stops13h 20m
United Airlines
Deal found 3/7![United Airlines logo]()
$382
This Alaska Airlines deal was found by Cheapflights users on 3/5. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/187:00 am
MSO
- STL
1 stop7h 24m
Alaska Airlines
Wed 4/227:00 am
STL
- MSO
1 stop8h 59m
Alaska Airlines
Deal found 3/5![Alaska Airlines logo]()
$333
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.
Tue 3/245:16 pm
MSO
- STL
1 stop5h 18m
United Airlines
Sat 3/289:00 am
STL
- MSO
1 stop8h 08m
United Airlines
Deal found 3/9![United Airlines logo]()
$438
Last-minute flights from Missoula to St. LouisDiscover last-minute flight deals from Missoula to St. Louis. Data last updated March 10, 2026 and is based on user searches.
Discover last-minute flight deals from Missoula to St. Louis. Data last updated March 10, 2026 and is based on user searches.
This Delta deal was found by Cheapflights users on 3/8. 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.
Mon 3/236:04 pm
MSO
- STL
1 stop5h 17m
Delta
Fri 3/2712:28 pm
STL
- MSO
1 stop8h 34m
Delta
Deal found 3/8![Delta logo]()
$435
This Kiwi.com deal was found by Cheapflights users on 3/8. 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.
Mon 3/238:17 pm
MSO
- STL
2 stops36h 32m
Multiple Airlines
Fri 3/2712:14 pm
STL
- MSO
1 stop8h 13m
Multiple Airlines
Deal found 3/8![Multiple Airlines logo]()
$537
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.
Tue 3/245:16 pm
MSO
- STL
1 stop5h 18m
United Airlines
Sat 3/289:00 am
STL
- MSO
1 stop8h 08m
United Airlines
Deal found 3/9![United Airlines logo]()
$438
This Alaska Airlines deal was found by Cheapflights users on 3/5. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/187:00 am
MSO
- STL
1 stop7h 24m
Alaska Airlines
Wed 4/227:00 am
STL
- MSO
1 stop8h 59m
Alaska Airlines
Deal found 3/5![Alaska Airlines logo]()
$333
This United Airlines deal was found by Cheapflights users on 3/5. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/182:38 pm
MSO
- STL
1 stop5h 16m
United Airlines
Wed 4/229:10 am
STL
- MSO
2 stops13h 20m
United Airlines
Deal found 3/5![United Airlines logo]()
$394
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 4/253:55 pm
MSO
- STL
1 stop7h 04m
Alaska Airlines
Wed 4/297:00 am
STL
- MSO
1 stop8h 59m
Alaska Airlines
Deal found 3/9![Alaska Airlines logo]()
$297
This United Airlines deal was found by Cheapflights users on 3/8. 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 4/252:38 pm
MSO
- STL
1 stop5h 16m
United Airlines
Wed 4/299:10 am
STL
- MSO
2 stops13h 20m
United Airlines
Deal found 3/8![United Airlines logo]()
$382
One-way flights from Missoula to St. LouisSearch for one-way flight options from Missoula to St. Louis. Find affordable one-way fares based on user searches. Data last updated March 10, 2026.
Search for one-way flight options from Missoula to St. Louis. Find affordable one-way fares based on user searches. Data last updated March 10, 2026.
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.
Sat 6/205:45 am
MSO
- STL
1 stop4h 45m
Delta
Deal found 3/9![Delta logo]()
$155
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.
Fri 6/1912:33 pm
MSO
- STL
1 stop7h 43m
United Airlines
Deal found 3/9![United Airlines logo]()
$167
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/2110:25 am
MSO
- STL
2 stops31h 48m
Multiple Airlines
Deal found 3/9![Multiple Airlines logo]()
$220
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.
Sun 6/217:59 pm
MSO
- STL
1 stop16h 56m
Alaska Airlines
Deal found 3/9![Alaska Airlines logo]()
$225
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 6/207:15 am
MSO
- STL
2 stops13h 01m
United Airlines
Deal found 3/9![United Airlines logo]()
$249
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/192:46 pm
MSO
- STL
3 stops42h 09m
Multiple Airlines
Deal found 3/9![Multiple Airlines logo]()
$347
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/2011:15 am
MSO
- STL
3 stops43h 32m
Multiple Airlines
Deal found 3/9![Multiple Airlines logo]()
$456
Find flight deals from Missoula to St. Louis
Discover tips and strategies to find the most affordable flight options for your journey from Missoula (MSO) 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 10, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $297 (Alaska Airlines) |
One-way from | $155 (Delta) |
Popular in | August |
Cheapest in | January |
Average price | $458 |
Cheapflights Fare Finder
Customize your flight search to find flights from Missoula 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 10, 2026.
Use the filters below to find and compare flights from Missoula to St. Louis that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
MissoulaSt. Louis
MSO - STL
MSOSTL
Missoula Johnson-Bell Field
Sat 4/25
3:55 pm-11:59 pm
1 stop7h 04m
Lambert-St Louis
Wed 4/29
7:00 am-2:59 pm
1 stop8h 59m
$297
MissoulaSt. Louis
MSO - STL
MSOSTL
Missoula Johnson-Bell Field
Sat 4/18
7:00 am-3:24 pm
1 stop7h 24m
Lambert-St Louis
Wed 4/22
7:00 am-2:59 pm
1 stop8h 59m
$333
Quickest round-trip
MissoulaSt. Louis
MSO - STL
MSOSTL
Missoula Johnson-Bell Field
Fri 7/3
5:45 am-11:30 am
1 stop4h 45m
Lambert-St Louis
Fri 7/3
6:59 pm-12:24 am
1 stop6h 25m
$369
MissoulaSt. Louis
MSO - STL
MSOSTL
Missoula Johnson-Bell Field
Sat 4/25
2:38 pm-8:54 pm
1 stop5h 16m
Lambert-St Louis
Wed 4/29
9:10 am-9:30 pm
2 stops13h 20m
$382
MissoulaSt. Louis
MSO - STL
MSOSTL
Missoula Johnson-Bell Field
Tue 3/24
5:16 pm-11:34 pm
1 stop5h 18m
Lambert-St Louis
Sat 3/28
9:00 am-4:08 pm
1 stop8h 08m
$438
Cheapest one-way
Quickest one-way
MissoulaSt. Louis
MSO - STL
MSOSTL
Missoula Johnson-Bell Field
Sat 6/20
5:45 am-11:30 am
1 stop4h 45m
$155
MissoulaSt. Louis
MSO - STL
MSOSTL
Missoula Johnson-Bell Field
Fri 6/19
12:33 pm-9:16 pm
1 stop7h 43m
$167
MissoulaSt. Louis
MSO - STL
MSOSTL
Missoula Johnson-Bell Field
Sun 6/21
10:25 am-7:13 pm
2 stops31h 48m
$220
MissoulaSt. Louis
MSO - STL
MSOSTL
Missoula Johnson-Bell Field
Sat 6/20
7:15 am-9:16 pm
2 stops13h 01m
$249
Sorted by cheapest first
Compare providers for flights from Missoula 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 Missoula 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 Missoula-St. Louis flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Missoula-St. Louis flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Missoula-St. Louis flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Missoula-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 Missoula-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 Missoula to St. Louis
Have a flexible travel schedule? Discover the best time to fly to St. Louis from Missoula with our price prediction graph.
MSO-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 10, 2026.
See what other customers who have flown with Delta and United Airlines from Missoula to St. Louis have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Entertainment
7.8
Overall
7.9
Comfort
7.9
Crew
8.5
Boarding
8.1
Food
7.2
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Entertainment
7.8
Overall
7.9
Comfort
7.9
Crew
8.5
Boarding
8.1
Food
7.2
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Entertainment
7.8
Overall
7.9
Comfort
7.9
Crew
8.5
Boarding
8.1
Food
7.2
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Related info for your journey
Find useful and relevant information for your journey from Missoula 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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Missoula and St. Louis flights
Browse other Missoula and St. Louis flight options. Last updated on March 10, 2026.
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Browse through other flights departing from Missoula. Flights are based on user searches made on Cheapflights and were last updated on March 10, 2026.
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Other flights to St. Louis
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Top 2 airlines flying from Missoula to St. Louis
Discover the top 2 airlines that operate flights from Missoula 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 10, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$238 | Average$374 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$274 | Average$474 | FlexibilityNo cancel fee | On-time69% |