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$194+ 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 10/11. Fares are subject to change and may not be available on all flights or dates of travel.
MSO — STL
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
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 September 11, 2025.

Round-trip from

$379
(Alaska Airlines)

One-way from

$194
(Hawaiian Airlines)

Popular in

August

Cheapest in

April

Average price

$470
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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Highest demand for flights based on searches. 7% potential increase in price ($39 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($20 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 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 September 11, 2025.

This Alaska Airlines deal was found by Cheapflights users on 9/11. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/246:02 amMSO - STL
1 stop8h 17mAlaska Airlines
Sat 12/67:00 amSTL - MSO
1 stop9h 32mAlaska Airlines
Deal found 9/11$379
This Alaska Airlines deal was found by Cheapflights users on 9/10. 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.
Sun 11/236:02 amMSO - STL
1 stop8h 17mAlaska Airlines
Tue 12/97:00 amSTL - MSO
1 stop9h 32mAlaska Airlines
Deal found 9/10$389
This Delta deal was found by Cheapflights users on 9/10. 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 11/245:25 amMSO - STL
1 stop7h 06mDelta
Sun 12/77:56 pmSTL - MSO
1 stop5h 39mDelta
Deal found 9/10$390
This Delta deal was found by Cheapflights users on 9/10. 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.
Sat 11/226:18 pmMSO - STL
1 stop5h 28mDelta
Thu 12/46:15 amSTL - MSO
1 stop7h 18mDelta
Deal found 9/10$391
This Delta deal was found by Cheapflights users on 9/10. 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 11/245:25 amMSO - STL
2 stops10h 24mDelta
Mon 12/87:56 pmSTL - MSO
1 stop5h 39mDelta
Deal found 9/10$395
This Delta deal was found by Cheapflights users on 9/10. 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.
Sat 11/226:18 pmMSO - STL
1 stop5h 28mDelta
Wed 12/32:36 pmSTL - MSO
2 stops10h 59mDelta
Deal found 9/10$396
This Alaska Airlines deal was found by Cheapflights users on 9/10. 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.
Sun 11/236:02 amMSO - STL
1 stop8h 17mAlaska Airlines
Sat 12/67:00 amSTL - MSO
1 stop9h 32mAlaska Airlines
Deal found 9/10$398
This Delta deal was found by Cheapflights users on 9/10. 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 11/245:25 amMSO - STL
1 stop7h 06mDelta
Sat 12/66:30 amSTL - MSO
1 stop7h 03mDelta
Deal found 9/10$399
This Delta deal was found by Cheapflights users on 9/10. 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 11/245:25 amMSO - STL
2 stops10h 24mDelta
Thu 12/42:36 pmSTL - MSO
2 stops10h 59mDelta
Deal found 9/10$400
This Delta deal was found by Cheapflights users on 9/10. 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.
Sat 11/221:13 pmMSO - STL
2 stops9h 09mDelta
Sat 12/66:30 amSTL - MSO
1 stop7h 03mDelta
Deal found 9/10$405

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 September 11, 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 11/24

6:02 am-3:19 pm

1 stop8h 17m

Lambert-St Louis

Sat 12/6

7:00 am-3:32 pm

1 stop9h 32m

$379

MissoulaSt. Louis

MSO - STL

MSOSTL

Missoula Johnson-Bell Field

Mon 11/24

5:25 am-1:31 pm

1 stop7h 06m

Lambert-St Louis

Mon 12/8

7:56 pm-12:35 am

1 stop5h 39m

$390

MissoulaSt. Louis

MSO - STL

MSOSTL

Missoula Johnson-Bell Field

Mon 11/24

5:25 am-1:31 pm

1 stop7h 06m

Lambert-St Louis

Sun 12/7

7:56 pm-12:35 am

1 stop5h 39m

$390

MissoulaSt. Louis

MSO - STL

MSOSTL

Missoula Johnson-Bell Field

Mon 11/24

5:25 am-1:31 pm

1 stop7h 06m

Lambert-St Louis

Tue 12/9

6:30 am-12:33 pm

1 stop7h 03m

$390

MissoulaSt. Louis

MSO - STL

MSOSTL

Missoula Johnson-Bell Field

Sun 11/23

6:18 pm-12:46 am

1 stop5h 28m

Lambert-St Louis

Thu 12/4

6:15 am-12:33 pm

1 stop7h 18m

$391

MissoulaSt. Louis

MSO - STL

MSOSTL

Missoula Johnson-Bell Field

Sat 11/22

6:18 pm-12:46 am

1 stop5h 28m

Lambert-St Louis

Wed 12/3

7:56 pm-12:35 am

1 stop5h 39m

$391

MissoulaSt. Louis

MSO - STL

MSOSTL

Missoula Johnson-Bell Field

Sat 11/22

6:18 pm-12:46 am

1 stop5h 28m

Lambert-St Louis

Tue 12/9

7:56 pm-12:35 am

1 stop5h 39m

$391

MissoulaSt. Louis

MSO - STL

MSOSTL

Missoula Johnson-Bell Field

Sun 11/23

6:18 pm-12:46 am

1 stop5h 28m

Lambert-St Louis

Sun 12/7

7:56 pm-12:35 am

1 stop5h 39m

$391

MissoulaSt. Louis

MSO - STL

MSOSTL

Missoula Johnson-Bell Field

Sat 11/22

6:18 pm-12:46 am

1 stop5h 28m

Lambert-St Louis

Thu 12/4

6:15 am-12:33 pm

1 stop7h 18m

$391

MissoulaSt. Louis

MSO - STL

MSOSTL

Missoula Johnson-Bell Field

Mon 11/24

5:25 am-4:49 pm

2 stops10h 24m

Lambert-St Louis

Thu 12/4

7:56 pm-12:35 am

1 stop5h 39m

$395

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/11

Showing 1-10 of 13 results
1
2

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 September 11, 2025.
See what other customers who have flown with Alaska Airlines, 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.
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.0

Boarding

8.1

Comfort

7.8

Crew

8.5

Overall

8.0

Food

7.1

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.0

Boarding

8.1

Comfort

7.8

Crew

8.5

Overall

8.0

Food

7.1

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.
Delta
8.0
Very good
7,960 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.0

Boarding

8.1

Comfort

7.8

Crew

8.5

Overall

8.0

Food

7.1

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.
United Airlines
7.4
Good
8,937 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.0

Boarding

8.1

Comfort

7.8

Crew

8.5

Overall

8.0

Food

7.1

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.

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 7h 06m. Alaska Airlines provides one of the quickest options available for as low as $390. 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 $260 on this airline. Additional options worth looking into are Alaska Airlines and United Airlines, starting at $280 and $334 round-trip. These flights start at 44% 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 St. Louis?

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

Browse thousands of different options on Cheapflights for your next trip

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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 September 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$260Average$390FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$280Average$384FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$334Average$474FlexibilityNo cancel feeOn-time69%

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