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$208+ 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 8/2. Fares are subject to change and may not be available on all flights or dates of travel.
MSO — STL
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
1 adult, Economy
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Cheap 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 June 12, 2025.

Round-trip from

$350
(Alaska Airlines)

One-way from

$208
(Mytrip)

Popular in

March

Cheapest in

April

Average price

$390
From Missoula Johnson-Bell Field to Lambert-St Louis
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One-way flight from Missoula Johnson-Bell Field to Lambert-St Louis
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High demand for flights, 3% potential price rise
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Cheapest flight prices on average. 2% potential price decrease ($12 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 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 June 12, 2025.

This Alaska Airlines deal was found by Cheapflights users on 6/12. 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 9/154:14 pmMSO - STL
1 stop6h 45mAlaska Airlines
Tue 9/233:35 pmSTL - MSO
1 stop9h 52mAlaska Airlines
Deal found 6/12$350
This Mytrip 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/255:44 pmMSO - STL
2 stops22h 20mMultiple Airlines
Sun 6/296:12 amSTL - MSO
2 stops34h 24mMultiple Airlines
Deal found 6/10$395
This United 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/252:23 pmMSO - STL
1 stop5h 25mUnited Airlines
Sun 6/295:00 amSTL - MSO
1 stop7h 38mUnited Airlines
Deal found 6/10$411
This Delta deal was found by Cheapflights users on 6/12. 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 9/156:10 pmMSO - STL
2 stops13h 00mDelta
Tue 9/231:30 pmSTL - MSO
2 stops12h 01mDelta
Deal found 6/12$415
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.
Sat 6/211:54 pmMSO - STL
1 stop6h 00mAmerican Airlines
Fri 6/277:20 amSTL - MSO
1 stop17h 04mAmerican Airlines
Deal found 6/11$625

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 June 12, 2025.
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

Mon 9/15

4:14 pm-11:59 pm

1 stop6h 45m

Lambert-St Louis

Tue 9/23

3:35 pm-12:27 am

1 stop9h 52m

$350

MissoulaSt. Louis

MSO - STL

MSOSTL

Missoula Johnson-Bell Field

Wed 6/25

5:44 pm-5:04 pm

2 stops22h 20m

Lambert-St Louis

Sun 6/29

6:12 am-3:36 pm

2 stops34h 24m

$395

MissoulaSt. Louis

MSO - STL

MSOSTL

Missoula Johnson-Bell Field

Wed 6/25

2:23 pm-8:48 pm

1 stop5h 25m

Lambert-St Louis

Sun 6/29

5:00 am-11:38 am

1 stop7h 38m

$411

MissoulaSt. Louis

MSO - STL

MSOSTL

Missoula Johnson-Bell Field

Mon 9/15

6:10 pm-8:10 am

2 stops13h 00m

Lambert-St Louis

Tue 9/23

1:30 pm-12:31 am

2 stops12h 01m

$415

MissoulaSt. Louis

MSO - STL

MSOSTL

Missoula Johnson-Bell Field

Sat 8/2

10:40 am-6:41 pm

3 stops31h 01m

$208

MissoulaSt. Louis

MSO - STL

MSOSTL

Missoula Johnson-Bell Field

Sun 6/29

12:54 pm-8:30 pm

1 stop6h 36m

$256

MissoulaSt. Louis

MSO - STL

MSOSTL

Missoula Johnson-Bell Field

Sat 8/2

5:45 am-9:18 am

2 stops26h 33m

$348

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/10

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

Rainfall in St. Louis by month

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

In terms of precipitation, rainfall in St. Louis ranges from 2.2 - 4.7 inches per month. May is typically the wettest month, when rainfall can reach 4.7 in. February is typically the driest time to visit St. Louis when rainfall is around 2.2 in.

Temperature in St. Louis by month

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

If weather is an important factor for your trip to St. Louis, 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 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 32.0 F).

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 June 12, 2025.
Peruse reviews from past customers who have flown with Alaska Airlines, Delta and United Airlines from Missoula to St. Louis to help guide your decision. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Food

7.1

Crew

8.5

Comfort

7.8

Overall

8.0

Entertainment

7.1

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

Boarding

8.1

Food

7.1

Crew

8.5

Comfort

7.8

Overall

8.0

Entertainment

7.1

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

Boarding

8.1

Food

7.1

Crew

8.5

Comfort

7.8

Overall

8.0

Entertainment

7.1

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

Boarding

8.1

Food

7.1

Crew

8.5

Comfort

7.8

Overall

8.0

Entertainment

7.1

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

Boarding

8.1

Food

7.1

Crew

8.5

Comfort

7.8

Overall

8.0

Entertainment

7.1

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 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.

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

    Our cheapest airline available from Missoula to St. Louis is Alaska Airlines. Our recent data shows that you can find tickets from as low as $350 on this airline. Additional options worth looking into are United Airlines and Delta, starting at $411 and $415 round-trip. These flights start at 24% 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.

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

    Currently, August is the cheapest month in which you can book a flight from Missoula to St. Louis (average of $311). Flying from Missoula to St. Louis in March is currently the most expensive (average of $356). 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

Traveling to a place near Missoula?

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

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Top 3 airlines flying from Missoula to St. Louis

Discover the top 3 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 June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
Alaska AirlinesCheapest$280Average$441FlexibilityNo cancel feeOn-time75%
DeltaCheapest$305Average$390FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$318Average$507FlexibilityNo cancel feeOn-time69%

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