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Cheap flights from Missoula to St. Louis from $350

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from Missoula to St. Louis departing on 8/25. 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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0 bags

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Cheap round-trip flights

Alaska Airlines Logo
6:40 pm - 2:39 pmMSO-STL
18h 59m1 stop
Alaska Airlines Logo
6:00 am - 12:32 pmSTL-MSO
7h 32m1 stop
$350Alaska Airlines
Find Deal
Mon, Aug 25 - Wed, Aug 27
American Airlines Logo
1:51 pm - 11:14 pmMSO-STL
8h 23m1 stop
American Airlines Logo
7:23 am - 11:29 pmSTL-MSO
17h 06m1 stop
$370American Airlines
Find Deal
Wed, Aug 20 - Wed, Aug 27
United Airlines Logo
6:30 am - 12:43 pmMSO-STL
5h 13m1 stop
United Airlines Logo
6:35 am - 11:27 amSTL-MSO
5h 52m1 stop
$371United Airlines
Find Deal
Sun, Aug 24 - Mon, Aug 25
United Airlines Logo
6:30 am - 12:43 pmMSO-STL
5h 13m1 stop
United Airlines Logo
11:30 am - 9:22 pmSTL-MSO
10h 52m2 stops
$376United Airlines
Find Deal
Sun, Aug 24 - Mon, Aug 25
Delta Logo
5:30 am - 2:30 pmMSO-STL
8h 00m2 stops
Delta Logo
8:46 am - 2:36 pmSTL-MSO
6h 50m1 stop
$386Delta
Find Deal
Wed, Aug 20 - Wed, Aug 27
Alaska Airlines Logo
6:35 am - 2:39 pmMSO-STL
7h 04m1 stop
Alaska Airlines Logo
6:30 pm - 12:27 amSTL-MSO
6h 57m1 stop
$390Alaska Airlines
Find Deal
Sat, Sep 13 - Sun, Sep 21
Delta Logo
5:30 am - 4:45 pmMSO-STL
10h 15m2 stops
Delta Logo
6:00 am - 2:36 pmSTL-MSO
9h 36m2 stops
$391Delta
Find Deal
Wed, Aug 20 - Wed, Aug 27
Alaska Airlines Logo
6:40 pm - 2:39 pmMSO-STL
18h 59m1 stop
Alaska Airlines Logo
6:00 am - 11:59 pmSTL-MSO
18h 59m2 stops
$398Alaska Airlines
Find Deal
Mon, Aug 25 - Wed, Aug 27
American Airlines Logo
1:51 pm - 11:14 pmMSO-STL
8h 23m1 stop
American Airlines Logo
6:45 am - 3:23 pmSTL-MSO
9h 38m1 stop
$411American Airlines
Find Deal
Fri, Aug 15 - Wed, Aug 20
Delta Logo
6:24 pm - 12:38 amMSO-STL
5h 14m1 stop
Delta Logo
2:15 pm - 12:15 amSTL-MSO
11h 00m2 stops
$416Delta
Find Deal
Mon, Aug 18 - Tue, Aug 19

Delta flights from Missoula to St. Louis

Our best Delta deals on Missoula to St. Louis flight tickets
Delta
Aug 20
MSO5:30 amMissoula Johnson-Bell Field
8h 00m
2 stops
STL2:30 pmLambert-St Louis
Aug 27
STL8:46 amLambert-St Louis
6h 50m
1 stop
MSO2:36 pmMissoula Johnson-Bell Field
$386
Find similar
Delta
Aug 20
MSO5:30 amMissoula Johnson-Bell Field
10h 15m
2 stops
STL4:45 pmLambert-St Louis
Aug 27
STL6:00 amLambert-St Louis
9h 36m
2 stops
MSO2:36 pmMissoula Johnson-Bell Field
$391
Find similar
Delta
Aug 18
MSO6:24 pmMissoula Johnson-Bell Field
5h 14m
1 stop
STL12:38 amLambert-St Louis
Aug 19
STL2:15 pmLambert-St Louis
11h 00m
2 stops
MSO12:15 amMissoula Johnson-Bell Field
$416
Find similar

Alaska Airlines flights from Missoula to St. Louis

Our best Alaska Airlines deals on Missoula to St. Louis flight tickets
Alaska Airlines
Aug 25
MSO6:40 pmMissoula Johnson-Bell Field
18h 59m
1 stop
STL2:39 pmLambert-St Louis
Aug 27
STL6:00 amLambert-St Louis
7h 32m
1 stop
MSO12:32 pmMissoula Johnson-Bell Field
$350
Find similar
Alaska Airlines
Sep 13
MSO6:35 amMissoula Johnson-Bell Field
7h 04m
1 stop
STL2:39 pmLambert-St Louis
Sep 21
STL6:30 pmLambert-St Louis
6h 57m
1 stop
MSO12:27 amMissoula Johnson-Bell Field
$390
Find similar
Alaska Airlines
Aug 25
MSO6:40 pmMissoula Johnson-Bell Field
18h 59m
1 stop
STL2:39 pmLambert-St Louis
Aug 27
STL6:00 amLambert-St Louis
18h 59m
2 stops
MSO11:59 pmMissoula Johnson-Bell Field
$398
Find similar

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 August 3, 2025.
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

MissoulaSt. Louis

MSO - STL

MSOSTL

Missoula Johnson-Bell Field

Mon 8/25

6:40 pm-2:39 pm

1 stop18h 59m

Lambert-St Louis

Wed 8/27

6:00 am-12:32 pm

1 stop7h 32m

$350

MissoulaSt. Louis

MSO - STL

MSOSTL

Missoula Johnson-Bell Field

Wed 8/20

1:51 pm-11:14 pm

1 stop8h 23m

Lambert-St Louis

Wed 8/27

7:23 am-11:29 pm

1 stop17h 06m

$370

MissoulaSt. Louis

MSO - STL

MSOSTL

Missoula Johnson-Bell Field

Sun 8/24

6:30 am-12:43 pm

1 stop5h 13m

Lambert-St Louis

Mon 8/25

6:35 am-11:27 am

1 stop5h 52m

$371

MissoulaSt. Louis

MSO - STL

MSOSTL

Missoula Johnson-Bell Field

Sun 8/24

6:30 am-12:43 pm

1 stop5h 13m

Lambert-St Louis

Mon 8/25

11:30 am-9:22 pm

2 stops10h 52m

$376

MissoulaSt. Louis

MSO - STL

MSOSTL

Missoula Johnson-Bell Field

Wed 8/20

5:30 am-2:30 pm

2 stops8h 00m

Lambert-St Louis

Wed 8/27

8:46 am-2:36 pm

1 stop6h 50m

$386

MissoulaSt. Louis

MSO - STL

MSOSTL

Missoula Johnson-Bell Field

Sat 9/13

6:35 am-2:39 pm

1 stop7h 04m

Lambert-St Louis

Sun 9/21

6:30 pm-12:27 am

1 stop6h 57m

$390

MissoulaSt. Louis

MSO - STL

MSOSTL

Missoula Johnson-Bell Field

Wed 8/20

5:30 am-4:45 pm

2 stops10h 15m

Lambert-St Louis

Wed 8/27

6:00 am-2:36 pm

2 stops9h 36m

$391

MissoulaSt. Louis

MSO - STL

MSOSTL

Missoula Johnson-Bell Field

Mon 8/25

6:40 pm-2:39 pm

1 stop18h 59m

Lambert-St Louis

Wed 8/27

6:00 am-11:59 pm

2 stops18h 59m

$398

MissoulaSt. Louis

MSO - STL

MSOSTL

Missoula Johnson-Bell Field

Fri 8/15

1:51 pm-11:14 pm

1 stop8h 23m

Lambert-St Louis

Wed 8/20

6:45 am-3:23 pm

1 stop9h 38m

$411

MissoulaSt. Louis

MSO - STL

MSOSTL

Missoula Johnson-Bell Field

Mon 8/18

6:24 pm-12:38 am

1 stop5h 14m

Lambert-St Louis

Tue 8/19

2:15 pm-12:15 am

2 stops11h 00m

$416

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

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 cheapest day to depart on your flight to St. Louis?

The cheapest day to depart on your flight to St. Louis is on a Wednesday when prices can be found for as low as $348. This is often the case because there is less demand to fly during this day of the week. If your travel schedule is flexible, try to avoid departing on a Sunday because tickets tend to average around $557. These prices are subject to change though, so be sure to set up a Price Alert for flights to St. Louis.

What is the cheapest time of day to depart on your flight to St. Louis?

Flying to St. Louis from Missoula at noon is the least expensive time of day to depart. momondo users have found prices as low as $512 when looking at flights departing at noon. In the afternoon is when there is more demand to fly to St. Louis, so prices are often more expensive at around $542 per ticket.

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

Best Price Found

$350

Fastest flight time

5h 13m

Direct flights

None

Airports in St. Louis

1 airport
The best flight deal from Missoula to St. Louis found on momondo in the last 72 hours is $350
The fastest flight from Missoula to St. Louis takes 5h 13m
There are no direct flights from Missoula to St. Louis. Popular non-direct route for this connection is Missoula Johnson-Bell Field Airport - Lambert-St Louis Airport.
There is 1 airport near St. Louis: Lambert-St Louis (STL)
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 13m.

  • 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
Alaska AirlinesPriceFrom $280Free CancellationRating
8.0
10,000 reviews
Search Alaska Airlines flights
DeltaPriceFrom $305Free CancellationRating
8.0
7,985 reviews
Search Delta flights
United AirlinesPriceFrom $318Free CancellationRating
7.4
8,905 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
Florissant
Fenton
Collinsville
O'Fallon
Alton
St. Peters
Farmington
Wentzville
Festus
Glencoe
Eureka
Edwardsville
Clayton
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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