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 46% 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 December 2025.

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.

$177 Cheap Flights from St. Louis to Missoula in 2025/26

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9:46 pm - 10:03 am

STL

MSO

13h 17m1 stop

10:53 am - 6:51 am

MSO

STL

42h 58m2 stops

$311Multiple Airlines

Sun, Jan 11 - Mon, Jan 19

7:43 pm - 10:03 am

STL

MSO

39h 20m2 stops

10:53 am - 9:14 pm

MSO

STL

9h 21m1 stop

$321Multiple Airlines

Wed, Jan 7 - Fri, Jan 16

7:43 pm - 10:03 am

STL

MSO

39h 20m2 stops

10:53 am - 9:14 pm

MSO

STL

9h 21m1 stop

$330Multiple Airlines

Sat, Jan 10 - Fri, Jan 16

9:46 pm - 10:03 am

STL

MSO

13h 17m1 stop

10:53 am - 9:14 pm

MSO

STL

9h 21m1 stop

$331Multiple Airlines

Sun, Jan 11 - Fri, Jan 16

7:00 am - 3:33 pm

STL

MSO

9h 33m1 stop

6:23 am - 1:54 pm

MSO

STL

6h 31m1 stop

$332Alaska Airlines

Tue, Jan 6 - Wed, Jan 21

3:40 pm - 8:14 pm

STL

MSO

5h 34m1 stop

7:55 am - 2:38 pm

MSO

STL

5h 43m1 stop

$333Delta

Sat, Jan 10 - Wed, Jan 21

5:00 pm - 12:29 am

STL

MSO

8h 29m1 stop

12:40 pm - 11:25 pm

MSO

STL

9h 45m2 stops

$338Delta

Tue, Jan 6 - Sat, Jan 17

7:00 am - 3:33 pm

STL

MSO

9h 33m1 stop

6:23 am - 1:54 pm

MSO

STL

6h 31m1 stop

$342Alaska Airlines

Tue, Jan 6 - Mon, Jan 19

9:59 am - 8:14 pm

STL

MSO

11h 15m2 stops

7:55 am - 8:43 pm

MSO

STL

11h 48m2 stops

$343Delta

Sat, Jan 10 - Wed, Jan 21

3:40 pm - 12:29 am

STL

MSO

9h 49m2 stops

12:40 pm - 9:38 pm

MSO

STL

7h 58m1 stop

$348Delta

Wed, Jan 7 - Sun, Jan 18

Alaska Airlines flights from St. Louis to Missoula

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

Alaska Airlines

Jan 6

STL7:00 amLambert-St Louis

9h 33m

1 stop

MSO3:33 pmMissoula Johnson-Bell Field

Jan 20

MSO6:23 amMissoula Johnson-Bell Field

6h 31m

1 stop

STL1:54 pmLambert-St Louis

$332

Find similar

Alaska Airlines

Jan 6

STL7:00 amLambert-St Louis

9h 33m

1 stop

MSO3:33 pmMissoula Johnson-Bell Field

Jan 19

MSO6:23 amMissoula Johnson-Bell Field

6h 31m

1 stop

STL1:54 pmLambert-St Louis

$342

Find similar

Alaska Airlines

Jan 5

STL5:26 pmLambert-St Louis

7h 16m

1 stop

MSO11:42 pmMissoula Johnson-Bell Field

Jan 21

MSO6:23 amMissoula Johnson-Bell Field

6h 31m

1 stop

STL1:54 pmLambert-St Louis

$351

Find similar

Delta flights from St. Louis to Missoula

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

Delta

Jan 10

STL3:40 pmLambert-St Louis

5h 34m

1 stop

MSO8:14 pmMissoula Johnson-Bell Field

Jan 21

MSO7:55 amMissoula Johnson-Bell Field

5h 43m

1 stop

STL2:38 pmLambert-St Louis

$333

Find similar

Delta

Jan 6

STL5:00 pmLambert-St Louis

8h 29m

1 stop

MSO12:29 amMissoula Johnson-Bell Field

Jan 21

MSO1:25 pmMissoula Johnson-Bell Field

9h 00m

2 stops

STL11:25 pmLambert-St Louis

$338

Find similar

Delta

Jan 10

STL9:59 amLambert-St Louis

11h 15m

2 stops

MSO8:14 pmMissoula Johnson-Bell Field

Jan 20

MSO6:18 pmMissoula Johnson-Bell Field

13h 35m

2 stops

STL8:53 amLambert-St Louis

$343

Find similar

Fly from

Fly to

Route

Depart

Return

Price

St. LouisMissoula

STL - MSO

STLMSO

Lambert-St Louis

Sun 1/11

9:46 pm-10:03 am

1 stop13h 17m

Missoula Johnson-Bell Field

Mon 1/19

10:53 am-6:51 am

2 stops42h 58m

$311

St. LouisMissoula

STL - MSO

STLMSO

Lambert-St Louis

Wed 1/7

7:43 pm-10:03 am

2 stops39h 20m

Missoula Johnson-Bell Field

Fri 1/16

10:53 am-9:14 pm

1 stop9h 21m

$321

St. LouisMissoula

STL - MSO

STLMSO

Lambert-St Louis

Sat 1/10

7:43 pm-10:03 am

2 stops39h 20m

Missoula Johnson-Bell Field

Fri 1/16

10:53 am-9:14 pm

1 stop9h 21m

$330

St. LouisMissoula

STL - MSO

STLMSO

Lambert-St Louis

Sun 1/11

9:46 pm-10:03 am

1 stop13h 17m

Missoula Johnson-Bell Field

Fri 1/16

10:53 am-9:14 pm

1 stop9h 21m

$331

St. LouisMissoula

STL - MSO

STLMSO

Lambert-St Louis

Tue 1/6

7:00 am-3:33 pm

1 stop9h 33m

Missoula Johnson-Bell Field

Wed 1/21

6:23 am-1:54 pm

1 stop6h 31m

$332

St. LouisMissoula

STL - MSO

STLMSO

Lambert-St Louis

Sat 1/10

3:40 pm-8:14 pm

1 stop5h 34m

Missoula Johnson-Bell Field

Wed 1/21

7:55 am-2:38 pm

1 stop5h 43m

$333

St. LouisMissoula

STL - MSO

STLMSO

Lambert-St Louis

Tue 1/6

5:00 pm-12:29 am

1 stop8h 29m

Missoula Johnson-Bell Field

Sat 1/17

12:40 pm-11:25 pm

2 stops9h 45m

$338

St. LouisMissoula

STL - MSO

STLMSO

Lambert-St Louis

Tue 1/6

7:00 am-3:33 pm

1 stop9h 33m

Missoula Johnson-Bell Field

Mon 1/19

6:23 am-1:54 pm

1 stop6h 31m

$342

St. LouisMissoula

STL - MSO

STLMSO

Lambert-St Louis

Sat 1/10

9:59 am-8:14 pm

2 stops11h 15m

Missoula Johnson-Bell Field

Wed 1/21

7:55 am-8:43 pm

2 stops11h 48m

$343

St. LouisMissoula

STL - MSO

STLMSO

Lambert-St Louis

Wed 1/7

3:40 pm-12:29 am

2 stops9h 49m

Missoula Johnson-Bell Field

Sun 1/18

12:40 pm-9:38 pm

1 stop7h 58m

$348

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 cheapest month to fly to Missoula?

The month of April is, on average, the cheapest month to fly to Missoula from St. Louis, with most prices found around $336. If you are unable to visit Missoula during the month of April, then departing from St. Louis during the month January is also very affordable. Most momondo users find prices during this month for around $367.

What is the cheapest day to depart on your flight to Missoula?

On average, the least expensive day to fly to Missoula from St. Louis is on a Tuesday. momondo users have found tickets for Tuesday departures for as low as $447. However, this price may fluctuate depending on the airline, the season, and holidays. On the other hand, Sunday is the most expensive day to depart from St. Louis because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $638.

What is the cheapest time of day to depart on your flight to Missoula?

The cheapest time of day to fly to Missoula is in the evening when flights can be purchased for as low as $205. Flights in the morning are often more expensive with an average ticket price of $584.

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 19m
Direct flights	None

The fastest flight from St. Louis to Missoula takes 5h 19m

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 19m 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 December 2025.
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 Delta, making up 45% of the total bookings. Other popular airlines include American Airlines with 28% and United Airlines with 28%.

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 $288	Free Cancellation	Rating 7.9 8,011 reviews	Search Delta flights
American Airlines	PriceFrom $294	Free Cancellation	Rating 7.2 11,045 reviews	Search American Airlines flights
United Airlines	PriceFrom $371	Free Cancellation	Rating 7.4 9,063 reviews	Search United 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.

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Cheap flights from St. Louis to Missoula from $177

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to Missoula departing on 1/12. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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Alaska Airlines flights from St. Louis to Missoula

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

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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

What is the cheapest month to fly to Missoula?

What is the cheapest day to depart on your flight to Missoula?

What is the cheapest time of day to depart on your flight to Missoula?

The cheapest time of day to fly to Missoula is in the evening when flights can be purchased for as low as $205. Flights in the morning are often more expensive with an average ticket price of $584.

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

What airlines fly to Missoula?

When to book flights from St. Louis to Missoula

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

Direct flights

How far is Lambert-St Louis to Missoula Johnson-Bell Field by plane?

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

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

How old do you have to be to fly 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?

What is the most popular airline from St. Louis to Missoula?

Best airlines flying from St. Louis to Missoula

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

Why use momondo?

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

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

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

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

An easier way to manage your Missoula trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to the United States

Airports servicing Montana