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Missoula

$176+ 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 8/5. Fares are subject to change and may not be available on all flights or dates of travel.
STL — MSO
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
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 June 12, 2025.

Round-trip from

$297
(American Airlines)

One-way from

$176
(American Airlines)

Popular in

December

Cheapest in

April

Average price

$561
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. 2% potential increase in price ($9 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($15 potential savings vs. average RT price).
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Average for round-trip flights in June 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 June 12, 2025.

This American Airlines deal was found by Cheapflights users on 6/11. 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.
Mon 8/48:01 pmSTL - MSO
1 stop17h 14mAmerican Airlines
Thu 8/76:45 amMSO - STL
1 stop12h 33mAmerican Airlines
Deal found 6/11$297
This Delta deal was found by Cheapflights users on 6/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/77:15 pmSTL - MSO
1 stop6h 09mDelta
Thu 7/176:24 pmMSO - STL
1 stop5h 14mDelta
Deal found 6/10$351
This Alaska Airlines deal was found by Cheapflights users on 6/10. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/206:33 amSTL - MSO
1 stop9h 47mAlaska Airlines
Mon 10/206:40 pmMSO - STL
1 stop19h 15mAlaska Airlines
Deal found 6/10$390
This United Airlines deal was found by Cheapflights users on 6/9. 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.
Sun 7/66:33 amSTL - MSO
1 stop6h 05mUnited Airlines
Thu 7/106:15 amMSO - STL
2 stops8h 32mUnited Airlines
Deal found 6/9$404
This Mytrip deal was found by Cheapflights users on 6/9. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/61:00 pmSTL - MSO
3 stops27h 30mMultiple Airlines
Wed 7/95:08 pmMSO - STL
3 stops39h 44mMultiple Airlines
Deal found 6/9$537

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 12, 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

Mon 8/4

8:01 pm-12:15 pm

1 stop17h 14m

Missoula Johnson-Bell Field

Thu 8/7

6:45 am-8:18 pm

1 stop12h 33m

$297

St. LouisMissoula

STL - MSO

STLMSO

Lambert-St Louis

Mon 7/7

7:15 pm-12:24 am

1 stop6h 09m

Missoula Johnson-Bell Field

Wed 7/16

6:24 pm-12:38 am

1 stop5h 14m

$351

St. LouisMissoula

STL - MSO

STLMSO

Lambert-St Louis

Mon 10/20

6:33 am-3:20 pm

1 stop9h 47m

Missoula Johnson-Bell Field

Mon 10/20

6:40 pm-2:55 pm

1 stop19h 15m

$390

St. LouisMissoula

STL - MSO

STLMSO

Lambert-St Louis

Sun 7/6

6:33 am-11:38 am

1 stop6h 05m

Missoula Johnson-Bell Field

Thu 7/10

6:15 am-3:47 pm

2 stops8h 32m

$404

St. LouisMissoula

STL - MSO

STLMSO

Lambert-St Louis

Sun 7/6

1:00 pm-3:30 pm

3 stops27h 30m

Missoula Johnson-Bell Field

Wed 7/9

5:08 pm-9:52 am

3 stops39h 44m

$537

St. LouisMissoula

STL - MSO

STLMSO

Lambert-St Louis

Tue 8/5

4:52 pm-11:29 pm

1 stop7h 37m

$176

St. LouisMissoula

STL - MSO

STLMSO

Lambert-St Louis

Tue 8/5

3:41 pm-12:24 am

2 stops9h 43m

$181

St. LouisMissoula

STL - MSO

STLMSO

Lambert-St Louis

Fri 7/18

10:47 am-10:38 am

3 stops24h 51m

$214

St. LouisMissoula

STL - MSO

STLMSO

Lambert-St Louis

Mon 9/1

5:15 am-3:18 pm

2 stops11h 03m

$231

St. LouisMissoula

STL - MSO

STLMSO

Lambert-St Louis

Tue 8/5

5:00 am-9:23 pm

3 stops17h 23m

$355

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/10

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 $506). 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 June 12, 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.

Rainfall in Missoula by month

Plan your trip to Missoula by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Missoula ranges from 0.7 - 2.1 inches per month. June is typically the wettest month, when rainfall can reach 2.1 in. February is typically the driest time to visit Missoula when rainfall is around 0.7 in.

Temperature in Missoula by month

Plan your trip to Missoula by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Missoula, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 68.0 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 24.8 F).

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 12, 2025.
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Boarding

8.1

Crew

8.5

Entertainment

7.1

Overall

8.0

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Boarding

8.1

Crew

8.5

Entertainment

7.1

Overall

8.0

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Delta
8.0
Very good
7,950 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Boarding

8.1

Crew

8.5

Entertainment

7.1

Overall

8.0

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
United Airlines
7.4
Good
8,790 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Boarding

8.1

Crew

8.5

Entertainment

7.1

Overall

8.0

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Boarding

8.1

Crew

8.5

Entertainment

7.1

Overall

8.0

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

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.

  • 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 $297. Other airlines that can offer you cheap pricing are Delta, from $351, and Alaska Airlines, from $390. 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 American Airlines ($176), Delta ($181), and Alaska Airlines ($231).

  • 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 $506). 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 June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$288Average$576FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$294Average$448FlexibilityNo cancel feeOn-time71%
Alaska AirlinesCheapest$325Average$535FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$371Average$600FlexibilityNo cancel feeOn-time69%

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