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Missoula

$180+ 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 10/21. Fares are subject to change and may not be available on all flights or dates of travel.
STL — MSO
Oct 25 — Nov 11
Sat 10/25
Sat 11/1
1 adult, Economy
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Cheap 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 September 25, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$347
(KAYAK)

One-way from

$180
(Alaska Airlines)

Popular in

December

Cheapest in

April

Average price

$402
Provider with most accurate pricing for Lambert-St Louis-Missoula Johnson-Bell Field flight deals.
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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
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One-way flight from Lambert-St Louis to Missoula Johnson-Bell Field
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Highest demand for flights based on searches. 5% potential increase in price ($24 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($13 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find flight deals from St. Louis to Missoula

Cheapest flights from St. Louis to Missoula
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 September 25, 2025.

This Alaska Airlines deal was found by Cheapflights users on 9/24. 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.
Wed 10/226:33 amSTL - MSO
1 stop6h 45mAlaska Airlines
Wed 10/296:32 amMSO - STL
1 stop7h 46mAlaska Airlines
Deal found 9/24$360
This Alaska Airlines deal was found by Cheapflights users on 9/22. 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.
Sat 10/186:33 amSTL - MSO
1 stop6h 45mAlaska Airlines
Sat 10/254:12 pmMSO - STL
1 stop6h 51mAlaska Airlines
Deal found 9/22$388
This Delta deal was found by Cheapflights users on 9/23. 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.
Sat 10/186:50 amSTL - MSO
1 stop6h 37mDelta
Sat 10/255:25 amMSO - STL
1 stop7h 14mDelta
Deal found 9/23$389
This Alaska Airlines deal was found by Cheapflights users on 9/24. 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.
Wed 10/86:33 amSTL - MSO
1 stop6h 45mAlaska Airlines
Sat 10/182:07 pmMSO - STL
1 stop8h 56mAlaska Airlines
Deal found 9/24$395
This United Airlines deal was found by Cheapflights users on 9/25. 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.
Mon 10/205:15 amSTL - MSO
1 stop5h 42mUnited Airlines
Mon 10/205:25 pmMSO - STL
1 stop5h 33mUnited Airlines
Deal found 9/25$451
This United Airlines deal was found by Cheapflights users on 9/24. 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.
Wed 10/85:00 amSTL - MSO
2 stops9h 27mUnited Airlines
Sat 10/186:25 amMSO - STL
2 stops8h 19mUnited Airlines
Deal found 9/24$459
This American Airlines deal was found by Cheapflights users on 9/23. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/121:20 pmSTL - MSO
1 stop7h 42mAmerican Airlines
Fri 12/197:01 amMSO - STL
1 stop9h 09mAmerican Airlines
Deal found 9/23$464

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 September 25, 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

Wed 10/22

6:33 am-12:18 pm

1 stop6h 45m

Missoula Johnson-Bell Field

Wed 10/29

6:32 am-3:18 pm

1 stop7h 46m

$360

St. LouisMissoula

STL - MSO

STLMSO

Lambert-St Louis

Sat 10/18

6:33 am-12:18 pm

1 stop6h 45m

Missoula Johnson-Bell Field

Sat 10/25

4:12 pm-12:03 am

1 stop6h 51m

$388

St. LouisMissoula

STL - MSO

STLMSO

Lambert-St Louis

Sat 10/18

6:50 am-12:27 pm

1 stop6h 37m

Missoula Johnson-Bell Field

Sat 10/25

5:25 am-1:39 pm

1 stop7h 14m

$389

St. LouisMissoula

STL - MSO

STLMSO

Lambert-St Louis

Wed 10/8

6:33 am-12:18 pm

1 stop6h 45m

Missoula Johnson-Bell Field

Sat 10/18

2:07 pm-12:03 am

1 stop8h 56m

$395

St. LouisMissoula

STL - MSO

STLMSO

Lambert-St Louis

Mon 10/20

5:15 am-9:57 am

1 stop5h 42m

Missoula Johnson-Bell Field

Mon 10/20

5:25 pm-11:58 pm

1 stop5h 33m

$451

St. LouisMissoula

STL - MSO

STLMSO

Lambert-St Louis

Tue 10/21

6:33 am-12:18 pm

1 stop6h 45m

$180

St. LouisMissoula

STL - MSO

STLMSO

Lambert-St Louis

Sun 10/5

5:15 am-9:57 am

1 stop5h 42m

$296

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/23

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 September.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
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 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.
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 $365). Flying from St. Louis to Missoula in March is currently the most expensive (average of $503). 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 September 25, 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 65% 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 September 25, 2025.
See what other customers who have flown with Alaska Airlines, 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.
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Entertainment

7.0

Food

7.1

Comfort

7.8

Boarding

8.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

BOS - HNL

The flight was awesome but a little long. I would prefer a flight with a layover. The amount of space available was minimal and a little uncomfortable for that long of a flight.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Entertainment

7.0

Food

7.1

Comfort

7.8

Boarding

8.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

BOS - HNL

The flight was awesome but a little long. I would prefer a flight with a layover. The amount of space available was minimal and a little uncomfortable for that long of a flight.
Delta
8.0
Very good
7,973 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Entertainment

7.0

Food

7.1

Comfort

7.8

Boarding

8.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

BOS - HNL

The flight was awesome but a little long. I would prefer a flight with a layover. The amount of space available was minimal and a little uncomfortable for that long of a flight.
United Airlines
7.4
Good
8,926 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Entertainment

7.0

Food

7.1

Comfort

7.8

Boarding

8.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

BOS - HNL

The flight was awesome but a little long. I would prefer a flight with a layover. The amount of space available was minimal and a little uncomfortable for that long of a flight.
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Entertainment

7.0

Food

7.1

Comfort

7.8

Boarding

8.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

BOS - HNL

The flight was awesome but a little long. I would prefer a flight with a layover. The amount of space available was minimal and a little uncomfortable for that long of a flight.

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 6h 37m. Fly via Alaska Airlines or Delta 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 Alaska Airlines, from $334. These flights start at 37% lower than the current average price 3 months from now.

  • 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 $365). Flying from St. Louis to Missoula in March is currently the most expensive (average of $503). 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 4 airlines flying from St. Louis to Missoula

Discover the top 4 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 September 25, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$288Average$539FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$294Average$449FlexibilityNo cancel feeOn-time71%
Alaska AirlinesCheapest$334Average$535FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$371Average$539FlexibilityNo cancel feeOn-time69%

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