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Cheap flights from Missoula to St. Louis from $170

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 5/15. 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
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.
Delta Logo
6:05 pm - 12:30 am
MSO
-
STL
5h 25m
1 stop
Delta Logo
7:59 pm - 12:22 am
STL
-
MSO
5h 23m
1 stop
$349Delta
Mon, May 18 - Wed, May 27
Delta Logo
6:05 pm - 12:30 am
MSO
-
STL
5h 25m
1 stop
Delta Logo
1:59 pm - 12:22 am
STL
-
MSO
11h 23m
2 stops
$354Delta
Mon, May 18 - Tue, Jun 2
Delta Logo
5:30 am - 4:46 pm
MSO
-
STL
10h 16m
2 stops
Delta Logo
1:59 pm - 12:22 am
STL
-
MSO
11h 23m
2 stops
$359Delta
Thu, May 21 - Wed, May 27
Multiple Airlines Logo
8:54 pm - 12:21 am
MSO
-
STL
26h 27m
2 stops
Multiple Airlines Logo
6:51 pm - 9:23 am
STL
-
MSO
15h 32m
1 stop
$366Multiple Airlines
Fri, May 15 - Wed, May 27
Delta Logo
6:05 pm - 12:30 am
MSO
-
STL
5h 25m
1 stop
Delta Logo
7:00 am - 12:34 pm
STL
-
MSO
6h 34m
1 stop
$374Delta
Wed, May 13 - Sat, May 30
Delta Logo
1:14 pm - 11:21 pm
MSO
-
STL
9h 07m
2 stops
Delta Logo
7:00 am - 12:34 pm
STL
-
MSO
6h 34m
1 stop
$379Delta
Wed, May 13 - Sun, May 31
Delta Logo
5:30 am - 4:46 pm
MSO
-
STL
10h 16m
2 stops
Delta Logo
1:59 pm - 12:22 am
STL
-
MSO
11h 23m
2 stops
$384Delta
Wed, May 13 - Wed, May 27
Delta Logo
6:05 pm - 12:30 am
MSO
-
STL
5h 25m
1 stop
Delta Logo
5:36 pm - 12:22 am
STL
-
MSO
7h 46m
2 stops
$404Delta
Fri, May 15 - Sun, May 31
Delta Logo
3:27 pm - 11:01 pm
MSO
-
STL
6h 34m
1 stop
Delta Logo
2:18 pm - 12:24 am
STL
-
MSO
11h 06m
2 stops
$409Delta
Wed, Sep 23 - Mon, Sep 28
Delta Logo
6:27 pm - 8:19 am
MSO
-
STL
12h 52m
2 stops
Delta Logo
2:18 pm - 12:24 am
STL
-
MSO
11h 06m
2 stops
$414Delta
Thu, Aug 6 - Mon, Aug 10

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Delta flights from Missoula to St. Louis

Our best Delta deals on Missoula to St. Louis flight tickets
Delta
May 18
MSO6:05 pmMissoula Johnson-Bell Field
5h 25m
1 stop
STL12:30 amLambert-St Louis
May 31
STL7:00 amLambert-St Louis
6h 34m
1 stop
MSO12:34 pmMissoula Johnson-Bell Field
$349
Delta
May 18
MSO6:05 pmMissoula Johnson-Bell Field
5h 25m
1 stop
STL12:30 amLambert-St Louis
May 27
STL3:11 pmLambert-St Louis
10h 11m
2 stops
MSO12:22 amMissoula Johnson-Bell Field
$354
Delta
May 21
MSO5:30 amMissoula Johnson-Bell Field
10h 16m
2 stops
STL4:46 pmLambert-St Louis
May 27
STL1:59 pmLambert-St Louis
11h 23m
2 stops
MSO12:22 amMissoula Johnson-Bell Field
$359

United Airlines flights from Missoula to St. Louis

Our best United Airlines deals on Missoula to St. Louis flight tickets
United Airlines
Aug 6
MSO5:20 pmMissoula Johnson-Bell Field
5h 37m
1 stop
STL11:57 pmLambert-St Louis
Aug 10
STL4:48 pmLambert-St Louis
5h 51m
1 stop
MSO9:39 pmMissoula Johnson-Bell Field
$419
United Airlines
Jun 27
MSO5:20 pmMissoula Johnson-Bell Field
5h 37m
1 stop
STL11:57 pmLambert-St Louis
Jul 4
STL5:10 amLambert-St Louis
5h 45m
1 stop
MSO9:55 amMissoula Johnson-Bell Field
$490
United Airlines
May 14
MSO2:37 pmMissoula Johnson-Bell Field
5h 06m
1 stop
STL8:43 pmLambert-St Louis
May 31
STL6:00 amLambert-St Louis
6h 32m
1 stop
MSO11:32 amMissoula Johnson-Bell Field
$509

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 April 30, 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
Quickest round-trip

MissoulaSt. Louis

MSO - STL

MSOSTL

Missoula Johnson-Bell Field

Mon 5/18

6:05 pm-12:30 am

1 stop5h 25m

Lambert-St Louis

Wed 5/27

7:59 pm-12:22 am

1 stop5h 23m

$349

MissoulaSt. Louis

MSO - STL

MSOSTL

Missoula Johnson-Bell Field

Mon 5/18

6:05 pm-12:30 am

1 stop5h 25m

Lambert-St Louis

Tue 6/2

1:59 pm-12:22 am

2 stops11h 23m

$354

MissoulaSt. Louis

MSO - STL

MSOSTL

Missoula Johnson-Bell Field

Thu 5/21

5:30 am-4:46 pm

2 stops10h 16m

Lambert-St Louis

Wed 5/27

1:59 pm-12:22 am

2 stops11h 23m

$359

MissoulaSt. Louis

MSO - STL

MSOSTL

Missoula Johnson-Bell Field

Fri 5/15

8:54 pm-12:21 am

2 stops26h 27m

Lambert-St Louis

Wed 5/27

6:51 pm-9:23 am

1 stop15h 32m

$366

MissoulaSt. Louis

MSO - STL

MSOSTL

Missoula Johnson-Bell Field

Wed 5/13

6:05 pm-12:30 am

1 stop5h 25m

Lambert-St Louis

Sat 5/30

7:00 am-12:34 pm

1 stop6h 34m

$374

MissoulaSt. Louis

MSO - STL

MSOSTL

Missoula Johnson-Bell Field

Wed 5/13

1:14 pm-11:21 pm

2 stops9h 07m

Lambert-St Louis

Sun 5/31

7:00 am-12:34 pm

1 stop6h 34m

$379

MissoulaSt. Louis

MSO - STL

MSOSTL

Missoula Johnson-Bell Field

Wed 5/13

5:30 am-4:46 pm

2 stops10h 16m

Lambert-St Louis

Wed 5/27

1:59 pm-12:22 am

2 stops11h 23m

$384

MissoulaSt. Louis

MSO - STL

MSOSTL

Missoula Johnson-Bell Field

Fri 5/15

6:05 pm-12:30 am

1 stop5h 25m

Lambert-St Louis

Sun 5/31

5:36 pm-12:22 am

2 stops7h 46m

$404

MissoulaSt. Louis

MSO - STL

MSOSTL

Missoula Johnson-Bell Field

Wed 9/23

3:27 pm-11:01 pm

1 stop6h 34m

Lambert-St Louis

Mon 9/28

2:18 pm-12:24 am

2 stops11h 06m

$409

MissoulaSt. Louis

MSO - STL

MSOSTL

Missoula Johnson-Bell Field

Thu 8/6

6:27 pm-8:19 am

2 stops12h 52m

Lambert-St Louis

Mon 8/10

2:18 pm-12:24 am

2 stops11h 06m

$414

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 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?

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 $301.

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 07m

Direct flights

None
The fastest flight from Missoula to St. Louis takes 5h 07m
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 07m.

  • 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
7.9
8,463 reviews
Search Delta flights
United AirlinesPriceFrom $274Free CancellationRating
7.4
9,677 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
Maryland Heights
O'Fallon
Florissant
St. Peters
Collinsville
Wentzville
Alton
Fenton
Farmington
Festus
Clayton
Eureka
Litchfield
Edwardsville
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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