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Cheap flights from Missoula to St. Louis from $165

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 5/23. 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

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Find the cheapest flights from Missoula to St. Louis

Cheap round-trip flights

Enter your travel dates to find the best prices.
Delta Logo
6:18 pm - 12:25 am
MSO
-
STL
5h 07m
1 stop
Delta Logo
5:36 pm - 11:40 pm
STL
-
MSO
7h 04m
1 stop
$297Delta
Wed, Apr 15 - Sat, May 16
Delta Logo
6:18 pm - 12:25 am
MSO
-
STL
5h 07m
1 stop
Delta Logo
3:11 pm - 12:22 am
STL
-
MSO
10h 11m
2 stops
$302Delta
Wed, Apr 15 - Wed, May 13
Delta Logo
1:40 pm - 11:13 pm
MSO
-
STL
8h 33m
2 stops
Delta Logo
1:56 pm - 12:22 am
STL
-
MSO
11h 26m
2 stops
$307Delta
Sat, Apr 18 - Wed, May 13
Delta Logo
6:18 pm - 12:25 am
MSO
-
STL
5h 07m
1 stop
Delta Logo
7:59 pm - 12:22 am
STL
-
MSO
5h 23m
1 stop
$313Delta
Fri, Apr 17 - Wed, May 13
Alaska Airlines Logo
3:55 pm - 11:59 pm
MSO
-
STL
7h 04m
1 stop
Alaska Airlines Logo
7:00 am - 2:59 pm
STL
-
MSO
8h 59m
1 stop
$317Alaska Airlines
Sat, Apr 25 - Wed, Apr 29
Delta Logo
1:40 pm - 11:14 pm
MSO
-
STL
8h 34m
2 stops
Delta Logo
5:36 pm - 11:40 pm
STL
-
MSO
7h 04m
1 stop
$318Delta
Fri, Apr 17 - Sat, May 16
United Airlines Logo
2:38 pm - 8:54 pm
MSO
-
STL
5h 16m
1 stop
United Airlines Logo
11:15 am - 9:30 pm
STL
-
MSO
11h 15m
2 stops
$322United Airlines
Sat, Apr 11 - Sat, Apr 18
Delta Logo
1:40 pm - 11:14 pm
MSO
-
STL
8h 34m
2 stops
Delta Logo
5:36 pm - 12:22 am
STL
-
MSO
7h 46m
2 stops
$323Delta
Fri, Apr 17 - Wed, May 13
Delta Logo
1:40 pm - 9:31 pm
MSO
-
STL
6h 51m
1 stop
Delta Logo
5:36 pm - 11:40 pm
STL
-
MSO
7h 04m
1 stop
$325Delta
Sat, Apr 18 - Sat, May 16
United Airlines Logo
12:33 pm - 7:23 pm
MSO
-
STL
5h 50m
1 stop
United Airlines Logo
4:45 pm - 9:34 pm
STL
-
MSO
5h 49m
1 stop
$329United Airlines
Sat, May 23 - Sat, May 30

Delta flights from Missoula to St. Louis

Our best Delta deals on Missoula to St. Louis flight tickets
Delta
Apr 15
MSO6:18 pmMissoula Johnson-Bell Field
5h 07m
1 stop
STL12:25 amLambert-St Louis
May 16
STL5:36 pmLambert-St Louis
7h 04m
1 stop
MSO11:40 pmMissoula Johnson-Bell Field
$297
Delta
Apr 15
MSO6:18 pmMissoula Johnson-Bell Field
5h 07m
1 stop
STL12:25 amLambert-St Louis
May 13
STL3:11 pmLambert-St Louis
10h 11m
2 stops
MSO12:22 amMissoula Johnson-Bell Field
$302
Delta
Apr 18
MSO1:40 pmMissoula Johnson-Bell Field
8h 33m
2 stops
STL11:13 pmLambert-St Louis
May 13
STL1:56 pmLambert-St Louis
11h 26m
2 stops
MSO12:22 amMissoula Johnson-Bell Field
$307

United Airlines flights from Missoula to St. Louis

Our best United Airlines deals on Missoula to St. Louis flight tickets
United Airlines
Apr 11
MSO2:38 pmMissoula Johnson-Bell Field
5h 16m
1 stop
STL8:54 pmLambert-St Louis
Apr 18
STL11:15 amLambert-St Louis
11h 15m
2 stops
MSO9:30 pmMissoula Johnson-Bell Field
$322
United Airlines
May 23
MSO12:33 pmMissoula Johnson-Bell Field
5h 50m
1 stop
STL7:23 pmLambert-St Louis
May 30
STL4:45 pmLambert-St Louis
5h 49m
1 stop
MSO9:34 pmMissoula Johnson-Bell Field
$329
United Airlines
May 23
MSO7:15 amMissoula Johnson-Bell Field
12h 42m
2 stops
STL8:57 pmLambert-St Louis
May 30
STL4:45 pmLambert-St Louis
5h 49m
1 stop
MSO9:34 pmMissoula Johnson-Bell Field
$334

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 March 16, 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

Wed 4/15

6:18 pm-12:25 am

1 stop5h 07m

Lambert-St Louis

Sat 5/16

5:36 pm-11:40 pm

1 stop7h 04m

$297

MissoulaSt. Louis

MSO - STL

MSOSTL

Missoula Johnson-Bell Field

Wed 4/15

6:18 pm-12:25 am

1 stop5h 07m

Lambert-St Louis

Wed 5/13

3:11 pm-12:22 am

2 stops10h 11m

$302

MissoulaSt. Louis

MSO - STL

MSOSTL

Missoula Johnson-Bell Field

Sat 4/18

1:40 pm-11:13 pm

2 stops8h 33m

Lambert-St Louis

Wed 5/13

1:56 pm-12:22 am

2 stops11h 26m

$307
Quickest round-trip

MissoulaSt. Louis

MSO - STL

MSOSTL

Missoula Johnson-Bell Field

Fri 4/17

6:18 pm-12:25 am

1 stop5h 07m

Lambert-St Louis

Wed 5/13

7:59 pm-12:22 am

1 stop5h 23m

$313

MissoulaSt. Louis

MSO - STL

MSOSTL

Missoula Johnson-Bell Field

Sat 4/25

3:55 pm-11:59 pm

1 stop7h 04m

Lambert-St Louis

Wed 4/29

7:00 am-2:59 pm

1 stop8h 59m

$317

MissoulaSt. Louis

MSO - STL

MSOSTL

Missoula Johnson-Bell Field

Fri 4/17

1:40 pm-11:14 pm

2 stops8h 34m

Lambert-St Louis

Sat 5/16

5:36 pm-11:40 pm

1 stop7h 04m

$318

MissoulaSt. Louis

MSO - STL

MSOSTL

Missoula Johnson-Bell Field

Sat 4/11

2:38 pm-8:54 pm

1 stop5h 16m

Lambert-St Louis

Sat 4/18

11:15 am-9:30 pm

2 stops11h 15m

$322

MissoulaSt. Louis

MSO - STL

MSOSTL

Missoula Johnson-Bell Field

Fri 4/17

1:40 pm-11:14 pm

2 stops8h 34m

Lambert-St Louis

Wed 5/13

5:36 pm-12:22 am

2 stops7h 46m

$323

MissoulaSt. Louis

MSO - STL

MSOSTL

Missoula Johnson-Bell Field

Sat 4/18

1:40 pm-9:31 pm

1 stop6h 51m

Lambert-St Louis

Sat 5/16

5:36 pm-11:40 pm

1 stop7h 04m

$325

MissoulaSt. Louis

MSO - STL

MSOSTL

Missoula Johnson-Bell Field

Sat 5/23

12:33 pm-7:23 pm

1 stop5h 50m

Lambert-St Louis

Sat 5/30

4:45 pm-9:34 pm

1 stop5h 49m

$329

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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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?

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 16m

Direct flights

None
The fastest flight from Missoula to St. Louis takes 5h 16m
There are no direct flights from Missoula to St. Louis. There are no popular flight routes from Missoula to St. Louis.
Search flight deals

  • 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 16m.

  • 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 $238Free CancellationRating
7.9
8,296 reviews
Search Delta flights
United AirlinesPriceFrom $274Free CancellationRating
7.4
9,428 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
Hermann
Fairview Heights
Florissant
Maryland Heights
O'Fallon
Collinsville
Alton
St. Peters
Wentzville
Fenton
Farmington
Clayton
Edwardsville
Festus
Eureka
Litchfield
Shrewsbury
Grafton

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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