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$145+ 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 5/3. Fares are subject to change and may not be available on all flights or dates of travel.
MSO — STL
Feb 26 — Mar 51
Thu 2/26
Thu 3/5
1 adult, Economy
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Cheap flight deals from Missoula to St. Louis

Cheapest flights from Missoula to St. Louis
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 January 27, 2026.

This Delta deal was found by Cheapflights users on 1/27. 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
Sun 9/278:50 am
STL
-
MSO
1 stop6h 47m
Delta
Deal found 1/27$289
This Delta deal was found by Cheapflights users on 1/26. 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 2/101:25 pm
MSO
-
STL
1 stop7h 13m
Delta
Sat 2/147:00 am
STL
-
MSO
1 stop6h 26m
Delta
Deal found 1/26$339
This Delta deal was found by Cheapflights users on 1/26. 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.
Wed 9/236:10 pm
MSO
-
STL
1 stop5h 26m
Delta
Mon 9/283:42 pm
STL
-
MSO
2 stops9h 42m
Delta
Deal found 1/26$349
This United Airlines deal was found by Cheapflights users on 1/27. 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 2/112:37 pm
MSO
-
STL
1 stop5h 21m
United Airlines
Sun 2/152:45 pm
STL
-
MSO
1 stop8h 12m
United Airlines
Deal found 1/27$361
This Alaska Airlines deal was found by Cheapflights users on 1/26. 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.
Wed 9/234:13 pm
MSO
-
STL
1 stop6h 46m
Alaska Airlines
Sun 9/276:20 pm
STL
-
MSO
2 stops22h 03m
Alaska Airlines
Deal found 1/26$398
This Alaska Airlines deal was found by Cheapflights users on 1/25. 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.
Tue 5/268:00 am
MSO
-
STL
1 stop6h 50m
Alaska Airlines
Fri 6/56:20 pm
STL
-
MSO
2 stops19h 03m
Alaska Airlines
Deal found 1/25$418
This United Airlines deal was found by Cheapflights users on 1/24. 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.
Fri 1/302:37 pm
MSO
-
STL
1 stop5h 21m
United Airlines
Sat 1/314:15 pm
STL
-
MSO
1 stop6h 36m
United Airlines
Deal found 1/24$439

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 January 27, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$339
(Delta)

One-way from

$145
(Delta)

Popular in

August

Cheapest in

January

Average price

$306
Provider with most accurate pricing for Missoula Johnson-Bell Field-Lambert-St Louis flight deals.
Search Deals
Provider most trusted by Cheapflights users for Missoula Johnson-Bell Field-Lambert-St Louis flights.
Search Deals
From Missoula Johnson-Bell Field to Lambert-St Louis
Search Deals
One-way flight from Missoula Johnson-Bell Field to Lambert-St Louis
Search Deals
Highest demand for flights based on searches. 14% potential increase in price ($80 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($20 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
Search Deals

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 January 27, 2026.
Use the filters below to find and compare flights from Missoula to St. Louis that are best for you.

Fly from

Missoula

Fly to

St. Louis

Route

Depart

Return

Price

MissoulaSt. Louis

MSO - STL

MSOSTL

Missoula Johnson-Bell Field

Tue 5/26

7:55 pm-3:50 pm

1 stop18h 55m

Lambert-St Louis

Fri 6/5

7:56 pm-12:23 pm

1 stop17h 27m

$289

MissoulaSt. Louis

MSO - STL

MSOSTL

Missoula Johnson-Bell Field

Tue 2/10

1:25 pm-9:38 pm

1 stop7h 13m

Lambert-St Louis

Sat 2/14

7:00 am-12:26 pm

1 stop6h 26m

$339

MissoulaSt. Louis

MSO - STL

MSOSTL

Missoula Johnson-Bell Field

Wed 2/11

2:37 pm-8:58 pm

1 stop5h 21m

Lambert-St Louis

Sun 2/15

2:45 pm-9:57 pm

1 stop8h 12m

$361

MissoulaSt. Louis

MSO - STL

MSOSTL

Missoula Johnson-Bell Field

Sun 5/3

6:18 pm-12:25 am

1 stop5h 07m

$145

MissoulaSt. Louis

MSO - STL

MSOSTL

Missoula Johnson-Bell Field

Sun 5/3

11:48 am-7:12 pm

2 stops30h 24m

$236

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/27

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 January.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • 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.
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 Missoula to St. Louis

How much does it cost to fly round-trip from Missoula to St. Louis?

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 January 27, 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.
Delta
7.9
Good
8,119 reviews

Food

7.2

Boarding

8.1

Entertainment

7.8

Comfort

7.9

Overall

7.9

Crew

8.5

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Delta
7.9
Good
8,119 reviews
Delta
7.9
Good
8,119 reviews

Food

7.2

Boarding

8.1

Entertainment

7.8

Comfort

7.9

Overall

7.9

Crew

8.5

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
United Airlines
7.4
Good
9,205 reviews
Delta
7.9
Good
8,119 reviews

Food

7.2

Boarding

8.1

Entertainment

7.8

Comfort

7.9

Overall

7.9

Crew

8.5

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.

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.

  • How long is the flight from Missoula to St. Louis?

    A quick flight from Missoula to St. Louis can take about 5h 21m. Alaska Airlines provides one of the quickest options available for as low as $361. Airlines will cover a distance of 1320 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the cheapest airlines flying from Missoula to St. Louis round-trip?

    Our cheapest airline available from Missoula to St. Louis is Delta. Our recent data shows that you can find tickets from as low as $238 on this airline. An additional option worth looking into is United Airlines, starting at $274. These flights start at 49% lower than the current average price 3 months from now.

  • Can I find deals for flights from Missoula to St. Louis that include hotel bookings?

    Yes. In addition to deals on Missoula to St. Louis flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Missoula to St. Louis?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Missoula to St. Louis.

  • Can I find deals for business class flights from Missoula to St. Louis?

    Yes. Cheapflights offers flight deals from Missoula to St. Louis by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

Traveling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
Edwardsville
O'Fallon
Swansea
Fairview Heights
Maryland Heights
Collinsville
Eureka
Glencoe
Chesterfield
Alton
Farmington
Festus

Browse thousands of different options on Cheapflights for your next trip

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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 January 27, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$238Average$390FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$274Average$473FlexibilityNo cancel feeOn-time69%

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