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 54% 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?

Delta is the most popular carrier 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 April 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.

$175 Cheap Flights from St. Louis to Missoula in 2026

Q: What is the typical price of a round-trip flight between St. Louis and Missoula?

Prices are currently low for flights on this route. Typical prices usually range from $495 to $448. The lowest price recently found on this route was $349.

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Find the cheapest flights from St. Louis to Missoula

Round-trip

One-way

Cheap round-trip flights

Enter your travel dates to find the best prices.

6:59 pm - 12:24 am

STL

MSO

6h 25m

1 stop

6:10 pm - 12:36 am

MSO

STL

5h 26m

1 stop

$349Delta

Mon, Aug 10 - Fri, Aug 14

2:18 pm - 12:24 am

STL

MSO

11h 06m

2 stops

6:10 pm - 12:36 am

MSO

STL

5h 26m

1 stop

$354Delta

Mon, Aug 10 - Fri, Aug 14

6:00 am - 11:32 am

STL

MSO

6h 32m

1 stop

5:20 pm - 11:57 pm

MSO

STL

5h 37m

1 stop

$377United Airlines

Sun, Jun 7 - Sat, Jun 13

5:30 pm - 11:47 pm

STL

MSO

7h 17m

1 stop

5:40 am - 4:45 pm

MSO

STL

10h 05m

2 stops

$379Delta

Sat, Aug 15 - Sat, Aug 22

4:06 pm - 9:30 pm

STL

MSO

6h 24m

1 stop

6:15 am - 2:28 pm

MSO

STL

7h 13m

1 stop

$399United Airlines

Tue, May 12 - Sat, May 16

9:21 am - 9:30 pm

STL

MSO

13h 09m

2 stops

2:37 pm - 8:43 pm

MSO

STL

5h 06m

1 stop

$404United Airlines

Tue, May 12 - Sat, May 16

5:36 pm - 12:22 am

STL

MSO

7h 46m

2 stops

5:30 am - 6:00 pm

MSO

STL

11h 30m

2 stops

$409Delta

Tue, May 12 - Sat, May 16

7:55 pm - 12:28 am

STL

MSO

5h 33m

1 stop

6:29 pm - 12:43 am

MSO

STL

5h 14m

1 stop

$419Delta

Tue, Jun 9 - Mon, Jun 15

3:57 pm - 12:28 am

STL

MSO

9h 31m

2 stops

6:29 pm - 12:43 am

MSO

STL

5h 14m

1 stop

$424Delta

Tue, Jun 9 - Mon, Jun 15

7:04 am - 1:25 pm

STL

MSO

7h 21m

1 stop

2:15 pm - 11:59 pm

MSO

STL

8h 44m

1 stop

$431American Airlines

Tue, Jun 9 - Mon, Jun 15

Delta flights from St. Louis to Missoula

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

Delta

Aug 10

STL6:59 pmLambert-St Louis

6h 25m

1 stop

MSO12:24 amMissoula Johnson-Bell Field

Aug 14

MSO6:10 pmMissoula Johnson-Bell Field

5h 26m

1 stop

STL12:36 amLambert-St Louis

$349

Delta

Aug 10

STL2:18 pmLambert-St Louis

11h 06m

2 stops

MSO12:24 amMissoula Johnson-Bell Field

Aug 14

MSO6:10 pmMissoula Johnson-Bell Field

5h 26m

1 stop

STL12:36 amLambert-St Louis

$354

Delta

Aug 15

STL5:30 pmLambert-St Louis

7h 17m

1 stop

MSO11:47 pmMissoula Johnson-Bell Field

Aug 22

MSO5:40 amMissoula Johnson-Bell Field

10h 05m

2 stops

STL4:45 pmLambert-St Louis

$379

Alaska Airlines flights from St. Louis to Missoula

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

Alaska Airlines

Sep 16

STL3:17 pmLambert-St Louis

8h 25m

1 stop

MSO10:42 pmMissoula Johnson-Bell Field

Sep 20

MSO7:00 amMissoula Johnson-Bell Field

10h 38m

1 stop

STL6:38 pmLambert-St Louis

$440

Alaska Airlines

May 16

STL7:41 pmLambert-St Louis

17h 35m

1 stop

MSO12:16 pmMissoula Johnson-Bell Field

May 23

MSO2:03 pmMissoula Johnson-Bell Field

8h 51m

1 stop

STL11:54 pmLambert-St Louis

$499

Alaska Airlines

Sep 16

STL3:17 pmLambert-St Louis

8h 42m

1 stop

MSO10:59 pmMissoula Johnson-Bell Field

Sep 20

MSO7:00 amMissoula Johnson-Bell Field

9h 03m

2 stops

STL5:03 pmLambert-St Louis

$508

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisMissoula

STL - MSO

STLMSO

Lambert-St Louis

Mon 8/10

6:59 pm-12:24 am

1 stop6h 25m

Missoula Johnson-Bell Field

Fri 8/14

6:10 pm-12:36 am

1 stop5h 26m

$349

St. LouisMissoula

STL - MSO

STLMSO

Lambert-St Louis

Mon 8/10

2:18 pm-12:24 am

2 stops11h 06m

Missoula Johnson-Bell Field

Fri 8/14

6:10 pm-12:36 am

1 stop5h 26m

$354

St. LouisMissoula

STL - MSO

STLMSO

Lambert-St Louis

Sun 6/7

6:00 am-11:32 am

1 stop6h 32m

Missoula Johnson-Bell Field

Sat 6/13

5:20 pm-11:57 pm

1 stop5h 37m

$377

St. LouisMissoula

STL - MSO

STLMSO

Lambert-St Louis

Sat 8/15

5:30 pm-11:47 pm

1 stop7h 17m

Missoula Johnson-Bell Field

Sat 8/22

5:40 am-4:45 pm

2 stops10h 05m

$379

St. LouisMissoula

STL - MSO

STLMSO

Lambert-St Louis

Tue 5/12

4:06 pm-9:30 pm

1 stop6h 24m

Missoula Johnson-Bell Field

Sat 5/16

6:15 am-2:28 pm

1 stop7h 13m

$399

St. LouisMissoula

STL - MSO

STLMSO

Lambert-St Louis

Tue 5/12

9:21 am-9:30 pm

2 stops13h 09m

Missoula Johnson-Bell Field

Sat 5/16

2:37 pm-8:43 pm

1 stop5h 06m

$404

St. LouisMissoula

STL - MSO

STLMSO

Lambert-St Louis

Tue 5/12

5:36 pm-12:22 am

2 stops7h 46m

Missoula Johnson-Bell Field

Sat 5/16

5:30 am-6:00 pm

2 stops11h 30m

$409

Quickest round-trip

St. LouisMissoula

STL - MSO

STLMSO

Lambert-St Louis

Tue 6/9

7:55 pm-12:28 am

1 stop5h 33m

Missoula Johnson-Bell Field

Mon 6/15

6:29 pm-12:43 am

1 stop5h 14m

$419

St. LouisMissoula

STL - MSO

STLMSO

Lambert-St Louis

Tue 6/9

3:57 pm-12:28 am

2 stops9h 31m

Missoula Johnson-Bell Field

Mon 6/15

6:29 pm-12:43 am

1 stop5h 14m

$424

St. LouisMissoula

STL - MSO

STLMSO

Lambert-St Louis

Tue 6/9

7:04 am-1:25 pm

1 stop7h 21m

Missoula Johnson-Bell Field

Mon 6/15

2:15 pm-11:59 pm

1 stop8h 44m

$431

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 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 typical price of a round-trip flight between St. Louis and Missoula?

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 46m
Direct flights	None

The fastest flight from St. Louis to Missoula takes 5h 46m

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

Search flight deals

Frequently asked questions about flying from St. Louis to Missoula

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 46m 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 April 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 43% of the total bookings. Other popular airlines include Delta with 38% and American Airlines with 19%.

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
Delta	PriceFrom $179	Free Cancellation	Rating 7.9 8,463 reviews	Search Delta flights
United Airlines	PriceFrom $257	Free Cancellation	Rating 7.4 9,677 reviews	Search United Airlines flights
American Airlines	PriceFrom $270	Free Cancellation	Rating 7.1 11,681 reviews	Search American Airlines 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.