What airlines fly to Missoula?

United Airlines, Delta and American Airlines are the top three most popular airlines that fly to Missoula from St. Louis according to our data. United Airlines is the first choice among our users, with 51% of people opting to fly with this airline when traveling to Missoula. Keep in mind that there are 3 different airlines that fly to Missoula on a routine basis, so you have a few additional options to choose from.

What is the cheapest airline that flies from Lambert-St Louis to Missoula Johnson-Bell Field?

American Airlines, United Airlines, and Delta are the most popular carriers operating from Lambert-St Louis to Missoula Johnson-Bell Field

When did momondo last update prices for flights from Lambert-St Louis Airport to Missoula Johnson-Bell Field Airport?

Prices for flights from Lambert-St Louis Airport to Missoula Johnson-Bell Field Airport are updated daily.

How many operators does momondo search for flights from Lambert-St Louis Airport to Missoula Johnson-Bell Field Airport?

There are 3 operators available for flights from Lambert-St Louis Airport to Missoula Johnson-Bell Field Airport as of March 2026.

How old do you have to be to fly from Lambert-St Louis Airport to Missoula Johnson-Bell Field Airport?

Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Lambert-St Louis Airport to Missoula Johnson-Bell Field Airport.

What documentation or ID do you need to fly to Missoula Johnson-Bell Field Airport?

The travel and health documents you'll need for your trip to Missoula Johnson-Bell Field Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Missoula Johnson-Bell Field Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

$165 Cheap Flights from St. Louis to Missoula in 2026

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Find the cheapest flights from St. Louis to Missoula

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

6:45 pm - 12:16 am

STL

MSO

6h 31m

1 stop

6:18 pm - 12:25 am

MSO

STL

5h 07m

1 stop

$329Delta

Fri, May 1 - Mon, May 4

7:00 am - 3:35 pm

STL

MSO

9h 35m

1 stop

1:53 pm - 11:59 pm

MSO

STL

9h 06m

1 stop

$337Alaska Airlines

Tue, Mar 31 - Wed, Apr 1

3:24 pm - 12:19 am

STL

MSO

9h 55m

1 stop

6:36 pm - 2:26 pm

MSO

STL

18h 50m

1 stop

$341Alaska Airlines

Thu, Sep 10 - Tue, Sep 15

7:59 pm - 12:22 am

STL

MSO

5h 23m

1 stop

6:05 pm - 12:30 am

MSO

STL

5h 25m

1 stop

$349Delta

Fri, May 29 - Mon, Jun 1

1:56 pm - 11:40 pm

STL

MSO

10h 44m

2 stops

6:05 pm - 12:30 am

MSO

STL

5h 25m

1 stop

$354Delta

Fri, May 29 - Mon, Jun 1

6:59 pm - 12:24 am

STL

MSO

6h 25m

1 stop

5:45 am - 11:30 am

MSO

STL

4h 45m

1 stop

$359Delta

Tue, Jun 9 - Sun, Jun 14

6:59 pm - 12:24 am

STL

MSO

6h 25m

1 stop

5:45 am - 11:30 am

MSO

STL

4h 45m

1 stop

$361Delta

Tue, Jun 9 - Sun, Jun 14

2:18 pm - 12:24 am

STL

MSO

11h 06m

2 stops

5:45 am - 11:30 am

MSO

STL

4h 45m

1 stop

$366Delta

Tue, Jun 9 - Sun, Jun 14

7:59 pm - 12:22 am

STL

MSO

5h 23m

1 stop

6:05 pm - 12:30 am

MSO

STL

5h 25m

1 stop

$373Delta

Fri, May 8 - Wed, May 13

5:10 am - 9:55 am

STL

MSO

5h 45m

1 stop

6:25 am - 9:16 pm

MSO

STL

13h 51m

2 stops

$375United Airlines

Thu, Jul 30 - Tue, Aug 4

Delta flights from St. Louis to Missoula

Our best Delta deals on St. Louis to Missoula flight tickets

Delta

May 1

STL6:45 pmLambert-St Louis

6h 31m

1 stop

MSO12:16 amMissoula Johnson-Bell Field

May 4

MSO6:18 pmMissoula Johnson-Bell Field

5h 07m

1 stop

STL12:25 amLambert-St Louis

$329

Delta

May 29

STL7:59 pmLambert-St Louis

5h 23m

1 stop

MSO12:22 amMissoula Johnson-Bell Field

Jun 1

MSO6:05 pmMissoula Johnson-Bell Field

5h 25m

1 stop

STL12:30 amLambert-St Louis

$349

Delta

May 29

STL1:56 pmLambert-St Louis

10h 44m

2 stops

MSO11:40 pmMissoula Johnson-Bell Field

Jun 1

MSO6:05 pmMissoula Johnson-Bell Field

5h 25m

1 stop

STL12:30 amLambert-St Louis

$354

Alaska Airlines flights from St. Louis to Missoula

Our best Alaska Airlines deals on St. Louis to Missoula flight tickets

Alaska Airlines

Mar 31

STL7:00 amLambert-St Louis

9h 35m

1 stop

MSO3:35 pmMissoula Johnson-Bell Field

Apr 1

MSO1:53 pmMissoula Johnson-Bell Field

9h 06m

1 stop

STL11:59 pmLambert-St Louis

$337

Alaska Airlines

Sep 10

STL3:24 pmLambert-St Louis

9h 55m

1 stop

MSO12:19 amMissoula Johnson-Bell Field

Sep 15

MSO6:36 pmMissoula Johnson-Bell Field

18h 50m

1 stop

STL2:26 pmLambert-St Louis

$341

Alaska Airlines

Jun 15

STL7:56 pmLambert-St Louis

15h 46m

1 stop

MSO10:42 amMissoula Johnson-Bell Field

Jun 22

MSO7:59 pmMissoula Johnson-Bell Field

16h 56m

1 stop

STL1:55 pmLambert-St Louis

$406

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisMissoula

STL - MSO

STLMSO

Lambert-St Louis

Fri 5/1

6:45 pm-12:16 am

1 stop6h 31m

Missoula Johnson-Bell Field

Mon 5/4

6:18 pm-12:25 am

1 stop5h 07m

$329

St. LouisMissoula

STL - MSO

STLMSO

Lambert-St Louis

Tue 3/31

7:00 am-3:35 pm

1 stop9h 35m

Missoula Johnson-Bell Field

Wed 4/1

1:53 pm-11:59 pm

1 stop9h 06m

$337

St. LouisMissoula

STL - MSO

STLMSO

Lambert-St Louis

Thu 9/10

3:24 pm-12:19 am

1 stop9h 55m

Missoula Johnson-Bell Field

Tue 9/15

6:36 pm-2:26 pm

1 stop18h 50m

$341

Quickest round-trip

St. LouisMissoula

STL - MSO

STLMSO

Lambert-St Louis

Fri 5/29

7:59 pm-12:22 am

1 stop5h 23m

Missoula Johnson-Bell Field

Mon 6/1

6:05 pm-12:30 am

1 stop5h 25m

$349

St. LouisMissoula

STL - MSO

STLMSO

Lambert-St Louis

Fri 5/29

1:56 pm-11:40 pm

2 stops10h 44m

Missoula Johnson-Bell Field

Mon 6/1

6:05 pm-12:30 am

1 stop5h 25m

$354

St. LouisMissoula

STL - MSO

STLMSO

Lambert-St Louis

Tue 6/9

6:59 pm-12:24 am

1 stop6h 25m

Missoula Johnson-Bell Field

Sun 6/14

5:45 am-11:30 am

1 stop4h 45m

$359

St. LouisMissoula

STL - MSO

STLMSO

Lambert-St Louis

Tue 6/9

6:59 pm-12:24 am

1 stop6h 25m

Missoula Johnson-Bell Field

Sun 6/14

5:45 am-11:30 am

1 stop4h 45m

$361

St. LouisMissoula

STL - MSO

STLMSO

Lambert-St Louis

Tue 6/9

2:18 pm-12:24 am

2 stops11h 06m

Missoula Johnson-Bell Field

Sun 6/14

5:45 am-11:30 am

1 stop4h 45m

$366

St. LouisMissoula

STL - MSO

STLMSO

Lambert-St Louis

Fri 5/8

7:59 pm-12:22 am

1 stop5h 23m

Missoula Johnson-Bell Field

Wed 5/13

6:05 pm-12:30 am

1 stop5h 25m

$373

St. LouisMissoula

STL - MSO

STLMSO

Lambert-St Louis

Thu 7/30

5:10 am-9:55 am

1 stop5h 45m

Missoula Johnson-Bell Field

Tue 8/4

6:25 am-9:16 pm

2 stops13h 51m

$375

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 16 resultsSorted by cheapest first

How to get the cheapest flight ticket from St. Louis to Missoula

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

What is the cheapest month to fly to Missoula?

The month of March is, on average, the cheapest month to fly to Missoula from St. Louis, with most prices found around $257. If you are unable to visit Missoula during the month of March, then departing from St. Louis during the month June is also very affordable. Most momondo users find prices during this month for around $333.

When to book flights from St. Louis to Missoula

Are you open to changing your travel dates? Check out the ideal times to fly from St. Louis to Missoula according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

Cheap St. Louis to Missoula (STL to MSO) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from St. Louis to Missoula

Fastest flight time	5h 23m
Direct flights	None

The fastest flight from St. Louis to Missoula takes 5h 23m

There are no direct flights from St. Louis to Missoula. There are no popular flight routes from St. Louis to Missoula.

Search flight deals

How far is Lambert-St Louis to Missoula Johnson-Bell Field by plane?
Missoula Johnson-Bell Field is 1327.0 mi away from Lambert-St Louis. 5h 23m is a normal flight duration for this route.
When did momondo last update prices for flights from Lambert-St Louis Airport to Missoula Johnson-Bell Field Airport?
Prices for flights from Lambert-St Louis Airport to Missoula Johnson-Bell Field Airport are updated daily.
How many operators does momondo search for flights from Lambert-St Louis Airport to Missoula Johnson-Bell Field Airport?
There are 3 operators available for flights from Lambert-St Louis Airport to Missoula Johnson-Bell Field Airport as of March 2026.
How old do you have to be to fly from Lambert-St Louis Airport to Missoula Johnson-Bell Field Airport?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Lambert-St Louis Airport to Missoula Johnson-Bell Field Airport.
What documentation or ID do you need to fly to Missoula Johnson-Bell Field Airport?
The travel and health documents you'll need for your trip to Missoula Johnson-Bell Field Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Missoula Johnson-Bell Field Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.
What is the most popular airline from St. Louis to Missoula?
Based on momondo bookings for flights between St. Louis and Missoula, the leading airline is United Airlines, making up 39% of the total bookings. Other popular airlines include Delta with 37% and American Airlines with 24%.

Best airlines flying from St. Louis to Missoula

Compare and see reviews for airlines that fly from St. Louis to Missoula with momondo

Airline	Rating	Free Cancellation	Price
United Airlines	PriceFrom $257	Free Cancellation	Rating 7.4 9,423 reviews	Search United Airlines flights
American Airlines	PriceFrom $270	Free Cancellation	Rating 7.1 11,464 reviews	Search American Airlines flights
Delta	PriceFrom $288	Free Cancellation	Rating 7.9 8,291 reviews	Search Delta flights

Why use momondo?

Why should I use momondo to find a flight deal from St. Louis to Missoula?

Finding the right flight to Missoula from St. Louis is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Missoula quick and easy, saving you time and money.

Can I find flights from St. Louis to Missoula with flexible booking policies on momondo?

Flights from St. Louis to Missoula with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from St. Louis to Missoula?

momondo helps you find the best flight between St. Louis and Missoula by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

I’m not ready to book a flight from St. Louis to Missoula right now. Can momondo alert me if prices change?

If you are simply researching potential flights to Missoula, momondo offers a useful price alert feature which will track prices for flights to Missoula from St. Louis and alert you when they change.