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Cheap flights from Missoula to St. Louis from $223

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 11/27. 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

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Multiple Airlines Logo
7:23 pm - 7:41 pmMSO-STL
23h 18m1 stop
Multiple Airlines Logo
5:44 pm - 10:03 amSTL-MSO
17h 19m1 stop
$348Multiple Airlines
Find Deal
Thu, Jan 29 - Sun, Feb 1
Delta Logo
7:55 am - 2:38 pmMSO-STL
5h 43m1 stop
Delta Logo
7:00 am - 11:59 amSTL-MSO
5h 59m1 stop
$359Delta
Find Deal
Thu, Jan 22 - Sun, Jan 25
Delta Logo
7:55 am - 2:38 pmMSO-STL
5h 43m1 stop
Delta Logo
7:00 am - 11:59 amSTL-MSO
5h 59m1 stop
$371Delta
Find Deal
Thu, Jan 22 - Sun, Jan 25
United Airlines Logo
6:00 am - 1:16 pmMSO-STL
6h 16m1 stop
United Airlines Logo
8:30 am - 9:51 pmSTL-MSO
14h 21m2 stops
$376United Airlines
Find Deal
Thu, Jan 29 - Sun, Feb 1
Alaska Airlines Logo
4:20 pm - 1:54 pmMSO-STL
20h 34m1 stop
Alaska Airlines Logo
2:50 pm - 1:23 pmSTL-MSO
23h 33m2 stops
$382Alaska Airlines
Find Deal
Tue, Jan 20 - Fri, Jan 23
Alaska Airlines Logo
4:20 pm - 1:54 pmMSO-STL
20h 34m1 stop
Alaska Airlines Logo
2:50 pm - 1:23 pmSTL-MSO
23h 33m2 stops
$386Alaska Airlines
Find Deal
Thu, Jan 22 - Sun, Jan 25
Alaska Airlines Logo
2:14 pm - 2:27 pmMSO-STL
23h 13m1 stop
Alaska Airlines Logo
3:23 pm - 12:26 amSTL-MSO
10h 03m1 stop
$390Alaska Airlines
Find Deal
Wed, Dec 10 - Sun, Dec 14
Delta Logo
6:10 pm - 12:36 amMSO-STL
5h 26m1 stop
Delta Logo
6:59 pm - 12:24 amSTL-MSO
6h 25m1 stop
$391Delta
Find Deal
Thu, Apr 16 - Mon, Apr 20
Alaska Airlines Logo
6:23 am - 1:54 pmMSO-STL
6h 31m1 stop
Alaska Airlines Logo
2:50 pm - 1:23 pmSTL-MSO
23h 33m2 stops
$392Alaska Airlines
Find Deal
Thu, Jan 29 - Sun, Feb 1
United Airlines Logo
2:35 pm - 8:57 pmMSO-STL
5h 22m1 stop
United Airlines Logo
2:45 pm - 9:41 pmSTL-MSO
7h 56m1 stop
$446United Airlines
Find Deal
Wed, Dec 17 - Thu, Dec 18

United Airlines flights from Missoula to St. Louis

Our best United Airlines deals on Missoula to St. Louis flight tickets
United Airlines
Jan 29
MSO6:00 amMissoula Johnson-Bell Field
6h 16m
1 stop
STL1:16 pmLambert-St Louis
Feb 1
STL8:30 amLambert-St Louis
14h 21m
2 stops
MSO9:51 pmMissoula Johnson-Bell Field
$376
Find similar
United Airlines
Dec 17
MSO2:35 pmMissoula Johnson-Bell Field
5h 22m
1 stop
STL8:57 pmLambert-St Louis
Dec 18
STL2:45 pmLambert-St Louis
7h 56m
1 stop
MSO9:41 pmMissoula Johnson-Bell Field
$446
Find similar
United Airlines
Jan 22
MSO6:00 amMissoula Johnson-Bell Field
10h 43m
2 stops
STL5:43 pmLambert-St Louis
Jan 25
STL9:57 amLambert-St Louis
12h 54m
2 stops
MSO9:51 pmMissoula Johnson-Bell Field
$461
Find similar

Alaska Airlines flights from Missoula to St. Louis

Our best Alaska Airlines deals on Missoula to St. Louis flight tickets
Alaska Airlines
Jan 20
MSO4:20 pmMissoula Johnson-Bell Field
20h 34m
1 stop
STL1:54 pmLambert-St Louis
Jan 23
STL2:50 pmLambert-St Louis
23h 33m
2 stops
MSO1:23 pmMissoula Johnson-Bell Field
$382
Find similar
Alaska Airlines
Jan 22
MSO4:20 pmMissoula Johnson-Bell Field
20h 34m
1 stop
STL1:54 pmLambert-St Louis
Jan 25
STL2:50 pmLambert-St Louis
23h 33m
2 stops
MSO1:23 pmMissoula Johnson-Bell Field
$386
Find similar
Alaska Airlines
Dec 10
MSO2:14 pmMissoula Johnson-Bell Field
23h 13m
1 stop
STL2:27 pmLambert-St Louis
Dec 14
STL3:23 pmLambert-St Louis
10h 03m
1 stop
MSO12:26 amMissoula Johnson-Bell Field
$390
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 October 30, 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

Thu 1/29

7:23 pm-7:41 pm

1 stop23h 18m

Lambert-St Louis

Sun 2/1

5:44 pm-10:03 am

1 stop17h 19m

$348

MissoulaSt. Louis

MSO - STL

MSOSTL

Missoula Johnson-Bell Field

Thu 1/22

7:55 am-2:38 pm

1 stop5h 43m

Lambert-St Louis

Sun 1/25

7:00 am-11:59 am

1 stop5h 59m

$359

MissoulaSt. Louis

MSO - STL

MSOSTL

Missoula Johnson-Bell Field

Thu 1/22

7:55 am-2:38 pm

1 stop5h 43m

Lambert-St Louis

Sun 1/25

7:00 am-11:59 am

1 stop5h 59m

$371

MissoulaSt. Louis

MSO - STL

MSOSTL

Missoula Johnson-Bell Field

Thu 1/29

6:00 am-1:16 pm

1 stop6h 16m

Lambert-St Louis

Sun 2/1

8:30 am-9:51 pm

2 stops14h 21m

$376

MissoulaSt. Louis

MSO - STL

MSOSTL

Missoula Johnson-Bell Field

Tue 1/20

4:20 pm-1:54 pm

1 stop20h 34m

Lambert-St Louis

Fri 1/23

2:50 pm-1:23 pm

2 stops23h 33m

$382

MissoulaSt. Louis

MSO - STL

MSOSTL

Missoula Johnson-Bell Field

Thu 1/22

4:20 pm-1:54 pm

1 stop20h 34m

Lambert-St Louis

Sun 1/25

2:50 pm-1:23 pm

2 stops23h 33m

$386

MissoulaSt. Louis

MSO - STL

MSOSTL

Missoula Johnson-Bell Field

Wed 12/10

2:14 pm-2:27 pm

1 stop23h 13m

Lambert-St Louis

Sun 12/14

3:23 pm-12:26 am

1 stop10h 03m

$390

MissoulaSt. Louis

MSO - STL

MSOSTL

Missoula Johnson-Bell Field

Thu 4/16

6:10 pm-12:36 am

1 stop5h 26m

Lambert-St Louis

Mon 4/20

6:59 pm-12:24 am

1 stop6h 25m

$391

MissoulaSt. Louis

MSO - STL

MSOSTL

Missoula Johnson-Bell Field

Thu 1/29

6:23 am-1:54 pm

1 stop6h 31m

Lambert-St Louis

Sun 2/1

2:50 pm-1:23 pm

2 stops23h 33m

$392

MissoulaSt. Louis

MSO - STL

MSOSTL

Missoula Johnson-Bell Field

Wed 12/17

2:35 pm-8:57 pm

1 stop5h 22m

Lambert-St Louis

Thu 12/18

2:45 pm-9:41 pm

1 stop7h 56m

$446

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 13 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 cheapest month to fly to St. Louis?

In general, January 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 $274. The month of April is another great option to travel to St. Louis, with average flight prices from Missoula averaging around $346.

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

Direct flights

None
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 22m.

  • 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 $260Free CancellationRating
7.9
7,998 reviews
Search Delta flights
United AirlinesPriceFrom $274Free CancellationRating
7.4
8,998 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
O'Fallon
Wentzville
Fenton
Collinsville
St. Peters
Alton
Farmington
Festus
Glencoe
Edwardsville
Clayton
Eureka
Litchfield
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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