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Missoula

$177+ 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 2/15. Fares are subject to change and may not be available on all flights or dates of travel.
STL — MSO
Jan 25 — Feb 11
Sun 1/25
Sun 2/1
1 adult, Economy
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Cheap flight deals from St. Louis to Missoula

Best flights from St. Louis to Missoula
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 December 26, 2025.

This American Airlines deal was found by Cheapflights users on 12/25. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 1/166:00 amSTL - MSO
1 stop7h 50mAmerican Airlines
Tue 1/201:21 pmMSO - STL
1 stop6h 54mAmerican Airlines
Deal found 12/25$384
This Kiwi.com deal was found by Cheapflights users on 12/23. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 1/81:07 pmSTL - MSO
1 stop21h 56mMultiple Airlines
Mon 1/1210:53 amMSO - STL
2 stops50h 55mMultiple Airlines
Deal found 12/23$386
This Delta deal was found by Cheapflights users on 12/25. 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.
Fri 1/165:00 pmSTL - MSO
1 stop8h 29mDelta
Tue 1/201:25 pmMSO - STL
2 stops9h 00mDelta
Deal found 12/25$390
This Alaska Airlines deal was found by Cheapflights users on 12/23. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 1/176:19 pmSTL - MSO
1 stop22h 12mAlaska Airlines
Wed 1/216:23 amMSO - STL
1 stop6h 31mAlaska Airlines
Deal found 12/23$400
This United Airlines deal was found by Cheapflights users on 12/24. 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 1/1711:20 amSTL - MSO
2 stops11h 31mUnited Airlines
Wed 1/216:00 amMSO - STL
2 stops10h 43mUnited Airlines
Deal found 12/24$449
This Alaska Airlines deal was found by Cheapflights users on 12/23. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 1/82:50 pmSTL - MSO
1 stop10h 05mAlaska Airlines
Mon 1/124:20 pmMSO - STL
1 stop20h 34mAlaska Airlines
Deal found 12/23$430

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 December 26, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$384
(American Airlines)

One-way from

$177
(Kiwi.com)

Popular in

December

Cheapest in

April

Average price

$794
Provider with most accurate pricing for Lambert-St Louis-Missoula Johnson-Bell Field flight deals.
Search Deals
Provider most trusted by Cheapflights users for Lambert-St Louis-Missoula Johnson-Bell Field flights.
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From Lambert-St Louis to Missoula Johnson-Bell Field
Search Deals
One-way flight from Lambert-St Louis to Missoula Johnson-Bell Field
Search Deals
Highest demand for flights based on searches. 15% potential increase in price ($86 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease ($30 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
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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 December 26, 2025.
Use the filters below to find and compare flights from St. Louis to Missoula that are best for you.

Fly from

St. Louis

Fly to

Missoula

Route

Depart

Return

Price

St. LouisMissoula

STL - MSO

STLMSO

Lambert-St Louis

Fri 1/16

6:00 am-12:50 pm

1 stop7h 50m

Missoula Johnson-Bell Field

Tue 1/20

1:21 pm-9:15 pm

1 stop6h 54m

$384

St. LouisMissoula

STL - MSO

STLMSO

Lambert-St Louis

Thu 1/8

1:07 pm-10:03 am

1 stop21h 56m

Missoula Johnson-Bell Field

Mon 1/12

10:53 am-2:48 pm

2 stops50h 55m

$386

St. LouisMissoula

STL - MSO

STLMSO

Lambert-St Louis

Fri 1/16

5:00 pm-12:29 am

1 stop8h 29m

Missoula Johnson-Bell Field

Tue 1/20

1:25 pm-11:25 pm

2 stops9h 00m

$390

St. LouisMissoula

STL - MSO

STLMSO

Lambert-St Louis

Sat 1/17

6:19 pm-3:31 pm

1 stop22h 12m

Missoula Johnson-Bell Field

Wed 1/21

6:23 am-1:54 pm

1 stop6h 31m

$400

St. LouisMissoula

STL - MSO

STLMSO

Lambert-St Louis

Thu 1/8

2:50 pm-11:55 pm

1 stop10h 05m

Missoula Johnson-Bell Field

Mon 1/12

4:20 pm-1:54 pm

1 stop20h 34m

$430

St. LouisMissoula

STL - MSO

STLMSO

Lambert-St Louis

Sat 1/17

11:20 am-9:51 pm

2 stops11h 31m

Missoula Johnson-Bell Field

Wed 1/21

6:00 am-5:43 pm

2 stops10h 43m

$449

St. LouisMissoula

STL - MSO

STLMSO

Lambert-St Louis

Sun 2/15

3:49 pm-3:15 pm

2 stops24h 26m

$177

St. LouisMissoula

STL - MSO

STLMSO

Lambert-St Louis

Sun 2/15

3:19 pm-11:59 pm

1 stop9h 40m

$205

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/25

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 December.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice 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 St. Louis-Missoula flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on St. Louis-Missoula flight deals on Cheapflights vs. eDreams >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 eDreams the most. eDreams 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.
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

What is the cheapest month to book a flight from St. Louis to Missoula?

Currently, October is the cheapest month in which you can book a flight from St. Louis to Missoula (average of $249). Flying from St. Louis to Missoula in December is currently the most expensive (average of $606). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from STL to MSO?

Find hourly flight availability from St. Louis to Missoula. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 26, 2025.

One of the essential ways to save on airfare from St. Louis to Missoula is to remain as flexible as possible. Flights that are in the morning tend to be the most expensive. A flight in the evening could potentially save you up to 64% on airfare.

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 December 26, 2025.
See what other customers who have flown with Delta, United Airlines, and American 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.
Delta
7.9
Good
8,013 reviews

Comfort

7.9

Boarding

8.1

Crew

8.5

Entertainment

7.9

Food

7.3

Overall

7.9

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
8,013 reviews
Delta
7.9
Good
8,013 reviews

Comfort

7.9

Boarding

8.1

Crew

8.5

Entertainment

7.9

Food

7.3

Overall

7.9

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
9,115 reviews
Delta
7.9
Good
8,013 reviews

Comfort

7.9

Boarding

8.1

Crew

8.5

Entertainment

7.9

Food

7.3

Overall

7.9

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.
American Airlines
7.2
Good
11,062 reviews
Delta
7.9
Good
8,013 reviews

Comfort

7.9

Boarding

8.1

Crew

8.5

Entertainment

7.9

Food

7.3

Overall

7.9

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 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.

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

    There are many flights that can get you from St. Louis to Missoula in 7h 50m. Fly via American Airlines, Delta, or Alaska Airlines to get the fastest option. Airlines will cover a distance of 1320 mi. This flight may include one or multiple stops.

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

    Cheapflights users have booked flights from St. Louis to Missoula round-trip from $288. Other airlines that can offer you cheap pricing are American Airlines, from $294, and United Airlines, from $371. These flights start at 38% lower than the current average price 3 months from now.

  • What are the cheapest airlines to fly from St. Louis to Missoula one-way?

    The cheapest airlines for a one-way flight from St. Louis to Missoula are Delta ($144), American Airlines ($169), and United Airlines ($175).

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

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

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

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

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

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

  • What is the cheapest month to book a flight from St. Louis to Missoula?

    Currently, October is the cheapest month in which you can book a flight from St. Louis to Missoula (average of $249). Flying from St. Louis to Missoula in December is currently the most expensive (average of $606). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Top 3 airlines flying from St. Louis to Missoula

Discover the top 3 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 December 26, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$288Average$470FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$294Average$394FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$371Average$496FlexibilityNo cancel feeOn-time69%

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