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Cheap flights from Missoula to St. Louis from $221

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Missoula to St. Louis departing on 9/23. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Missoula to St. Louis

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
9:49 pm - 11:17 am
MSO
-
STL
12h 28m
1 stop
Multiple Airlines Logo
8:10 pm - 3:57 pm
STL
-
MSO
44h 47m
2 stops
$415Multiple Airlines
Sun, Sep 27 - Fri, Oct 2
American Airlines Logo
1:12 pm - 12:14 am
MSO
-
STL
10h 02m
1 stop
American Airlines Logo
5:42 am - 12:35 pm
STL
-
MSO
7h 53m
1 stop
$447American Airlines
Thu, Aug 27 - Sun, Aug 30
American Airlines Logo
1:12 pm - 12:55 pm
MSO
-
STL
22h 43m
1 stop
American Airlines Logo
5:00 am - 12:42 pm
STL
-
MSO
8h 42m
1 stop
$447American Airlines
Fri, Aug 28 - Sun, Aug 30
American Airlines Logo
1:18 pm - 8:24 am
MSO
-
STL
18h 06m
1 stop
American Airlines Logo
6:36 am - 12:35 pm
STL
-
MSO
6h 59m
1 stop
$447American Airlines
Fri, Sep 4 - Sun, Sep 6
Delta Logo
7:13 am - 1:38 pm
MSO
-
STL
5h 25m
1 stop
Delta Logo
5:34 pm - 11:47 pm
STL
-
MSO
7h 13m
1 stop
$455Delta
Sat, Sep 5 - Mon, Sep 7
United Airlines Logo
5:24 pm - 11:40 pm
MSO
-
STL
5h 16m
1 stop
United Airlines Logo
12:59 pm - 9:31 pm
STL
-
MSO
9h 32m
2 stops
$474United Airlines
Fri, Sep 4 - Sun, Sep 6
United Airlines Logo
2:40 pm - 8:46 pm
MSO
-
STL
5h 06m
1 stop
United Airlines Logo
8:00 am - 4:20 pm
STL
-
MSO
9h 20m
2 stops
$474United Airlines
Sat, Sep 5 - Sun, Sep 6
United Airlines Logo
5:24 pm - 11:31 pm
MSO
-
STL
5h 07m
1 stop
United Airlines Logo
1:36 pm - 10:30 pm
STL
-
MSO
9h 54m
2 stops
$480United Airlines
Thu, Aug 27 - Sun, Aug 30
Delta Logo
7:13 am - 10:03 pm
MSO
-
STL
13h 50m
2 stops
Delta Logo
5:34 pm - 11:47 pm
STL
-
MSO
7h 13m
1 stop
$483Delta
Sat, Sep 5 - Mon, Sep 7
Delta Logo
6:27 pm - 12:41 am
MSO
-
STL
5h 14m
1 stop
Delta Logo
5:34 pm - 11:47 pm
STL
-
MSO
7h 13m
1 stop
$550Delta
Fri, Aug 14 - Tue, Aug 18

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Alaska Airlines flights from Missoula to St. Louis

Our best Alaska Airlines deals on Missoula to St. Louis flight tickets
Alaska Airlines
Oct 24
MSO2:06 pmMissoula Johnson-Bell Field
8h 53m
1 stop
STL11:59 pmLambert-St Louis
Oct 28
STL7:02 amLambert-St Louis
8h 48m
1 stop
MSO2:50 pmMissoula Johnson-Bell Field
$455
Alaska Airlines
Oct 24
MSO2:06 pmMissoula Johnson-Bell Field
8h 53m
1 stop
STL11:59 pmLambert-St Louis
Oct 28
STL7:02 amLambert-St Louis
8h 48m
1 stop
MSO2:50 pmMissoula Johnson-Bell Field
$475
Alaska Airlines
Sep 23
MSO7:00 amMissoula Johnson-Bell Field
12h 52m
2 stops
STL8:52 pmLambert-St Louis
Sep 27
STL6:29 amLambert-St Louis
9h 48m
1 stop
MSO3:17 pmMissoula Johnson-Bell Field
$510

American Airlines flights from Missoula to St. Louis

Our best American Airlines deals on Missoula to St. Louis flight tickets
American Airlines
Aug 27
MSO1:12 pmMissoula Johnson-Bell Field
10h 02m
1 stop
STL12:14 amLambert-St Louis
Aug 30
STL5:42 amLambert-St Louis
7h 53m
1 stop
MSO12:35 pmMissoula Johnson-Bell Field
$447
American Airlines
Oct 20
MSO1:05 pmMissoula Johnson-Bell Field
9h 53m
2 stops
STL11:58 pmLambert-St Louis
Oct 23
STL7:29 amLambert-St Louis
6h 06m
1 stop
MSO12:35 pmMissoula Johnson-Bell Field
$460
American Airlines
Nov 13
MSO1:10 pmMissoula Johnson-Bell Field
20h 48m
1 stop
STL10:58 amLambert-St Louis
Nov 15
STL5:00 amLambert-St Louis
8h 40m
1 stop
MSO12:40 pmMissoula Johnson-Bell Field
$464

momondo 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, momondo users made 832,500 searches. Data last updated July 31, 2026.
Use the filters below to find and compare flights from Missoula to St. Louis that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

MissoulaSt. Louis

MSO - STL

MSOSTL

Missoula Johnson-Bell Field

Sun 9/27

9:49 pm-11:17 am

1 stop12h 28m

Lambert-St Louis

Fri 10/2

8:10 pm-3:57 pm

2 stops44h 47m

$415

MissoulaSt. Louis

MSO - STL

MSOSTL

Missoula Johnson-Bell Field

Thu 8/27

1:12 pm-12:14 am

1 stop10h 02m

Lambert-St Louis

Sun 8/30

5:42 am-12:35 pm

1 stop7h 53m

$447

MissoulaSt. Louis

MSO - STL

MSOSTL

Missoula Johnson-Bell Field

Fri 8/28

1:12 pm-12:55 pm

1 stop22h 43m

Lambert-St Louis

Sun 8/30

5:00 am-12:42 pm

1 stop8h 42m

$447

MissoulaSt. Louis

MSO - STL

MSOSTL

Missoula Johnson-Bell Field

Fri 9/4

1:18 pm-8:24 am

1 stop18h 06m

Lambert-St Louis

Sun 9/6

6:36 am-12:35 pm

1 stop6h 59m

$447

MissoulaSt. Louis

MSO - STL

MSOSTL

Missoula Johnson-Bell Field

Sat 9/5

7:13 am-1:38 pm

1 stop5h 25m

Lambert-St Louis

Mon 9/7

5:34 pm-11:47 pm

1 stop7h 13m

$455

MissoulaSt. Louis

MSO - STL

MSOSTL

Missoula Johnson-Bell Field

Fri 9/4

5:24 pm-11:40 pm

1 stop5h 16m

Lambert-St Louis

Sun 9/6

12:59 pm-9:31 pm

2 stops9h 32m

$474

MissoulaSt. Louis

MSO - STL

MSOSTL

Missoula Johnson-Bell Field

Sat 9/5

2:40 pm-8:46 pm

1 stop5h 06m

Lambert-St Louis

Sun 9/6

8:00 am-4:20 pm

2 stops9h 20m

$474

MissoulaSt. Louis

MSO - STL

MSOSTL

Missoula Johnson-Bell Field

Thu 8/27

5:24 pm-11:31 pm

1 stop5h 07m

Lambert-St Louis

Sun 8/30

1:36 pm-10:30 pm

2 stops9h 54m

$480

MissoulaSt. Louis

MSO - STL

MSOSTL

Missoula Johnson-Bell Field

Sat 9/5

7:13 am-10:03 pm

2 stops13h 50m

Lambert-St Louis

Mon 9/7

5:34 pm-11:47 pm

1 stop7h 13m

$483
Quickest round-trip

MissoulaSt. Louis

MSO - STL

MSOSTL

Missoula Johnson-Bell Field

Fri 8/14

6:27 pm-12:41 am

1 stop5h 14m

Lambert-St Louis

Tue 8/18

5:34 pm-11:47 pm

1 stop7h 13m

$550

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 18 resultsSorted by cheapest first
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See travel insights to St. Louis from

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

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 typical price of a round-trip flight between Missoula and St. Louis?

Prices are currently low for flights on this route.

Typical prices usually range from $550 to $701.
The lowest price recently found on this route was $415.

What is the cheapest month to fly to St. Louis?

In general, October is the cheapest month to fly from Missoula to St. Louis. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $0. The month of April is another great option to travel to St. Louis, with average flight prices from Missoula averaging around $305.

When to book flights from Missoula to St. Louis

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

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

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

Fastest flight time

5h 02m

Direct flights

None
The fastest flight from Missoula to St. Louis takes 5h 02m
There are no direct flights from Missoula to St. Louis. There are no popular flight routes from Missoula to St. Louis.
Search flight deals

Frequently asked questions about flying from Missoula to St. Louis

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

    The straight-line distance from Missoula Johnson-Bell Field to Lambert-St Louis is 1327.0 mi. A reasonable flight in good conditions will take 5h 02m.

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

    Prices for flights from Missoula Johnson-Bell Field Airport to Lambert-St Louis Airport are refreshed on a daily basis.

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

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

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Missoula Johnson-Bell Field Airport to Lambert-St Louis Airport.

  • What documentation or ID do you need to fly to Lambert-St Louis Airport?

    The necessary travel and health documents for your Lambert-St Louis Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

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

Best airlines flying from Missoula to St. Louis

Compare and see reviews for airlines that fly from Missoula to St. Louis with momondo
Airline
Rating
Free Cancellation
Price
DeltaPriceFrom $164Free CancellationRating
7.8
8,494 reviews
Search Delta flights
United AirlinesPriceFrom $274Free CancellationRating
7.4
10,053 reviews
Search United Airlines flights

Traveling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
St. Charles
Chesterfield
Fairview Heights
Hermann
St. Peters
Maryland Heights
Florissant
Collinsville
O'Fallon
Alton
Fenton
Farmington
Clayton
Wentzville
Festus
Eureka
Litchfield
Edwardsville
Grafton
Shrewsbury

Why use momondo?

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

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Missoula to St. Louis. Millions of users trust and use momondo every year so you are in good hands.

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

Yes. All flights to St. Louis from Missoula on momondo can be compared and filtered by various policies on offer, including flexible booking.

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

Once all potential Missoula to St. Louis flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

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

Price alerts on flights to St. Louis from Missoula are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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