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Cheap flights from Montana to St. Louis from $136

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Montana to St. Louis departing on 5/17. 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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Find the cheapest flights from Montana to St. Louis

Cheap round-trip flights

Enter your travel dates to find the best prices.
Southwest Logo
1:30 pm - 11:45 pm
BZN
-
STL
9h 15m
1 stop
Southwest Logo
6:55 pm - 12:45 am
STL
-
BZN
6h 50m
1 stop
$227Southwest
Tue, Jun 9 - Tue, Jun 16
Southwest Logo
1:30 pm - 11:55 pm
BZN
-
STL
9h 25m
2 stops
Southwest Logo
6:55 pm - 12:45 am
STL
-
BZN
6h 50m
1 stop
$232Southwest
Tue, Jun 9 - Tue, Jun 16
Southwest Logo
4:20 pm - 11:50 pm
BZN
-
STL
6h 30m
1 stop
Southwest Logo
6:45 pm - 11:00 pm
STL
-
BZN
5h 15m
1 stop
$271Southwest
Mon, Apr 27 - Mon, May 4
Delta Logo
5:20 am - 1:17 pm
BZN
-
STL
6h 57m
1 stop
Delta Logo
6:00 am - 1:36 pm
STL
-
BZN
8h 36m
1 stop
$278Delta
Fri, Apr 10 - Tue, Apr 14
Delta Logo
6:10 pm - 12:25 am
FCA
-
STL
5h 15m
1 stop
Delta Logo
6:45 pm - 11:27 pm
STL
-
FCA
5h 42m
1 stop
$297Delta
Wed, Apr 29 - Wed, May 6
United Airlines Logo
4:29 pm - 11:57 pm
BZN
-
STL
6h 28m
1 stop
United Airlines Logo
5:10 am - 9:37 am
STL
-
BZN
5h 27m
1 stop
$303United Airlines
Fri, Jun 26 - Mon, Jul 6
United Airlines Logo
2:33 pm - 8:43 pm
FCA
-
STL
5h 10m
1 stop
United Airlines Logo
5:10 am - 10:01 am
STL
-
FCA
5h 51m
1 stop
$316United Airlines
Sat, May 16 - Sun, Aug 9
American Airlines Logo
7:00 am - 2:45 pm
BIL
-
STL
6h 45m
1 stop
American Airlines Logo
7:01 am - 12:40 pm
STL
-
BIL
6h 39m
1 stop
$319American Airlines
Tue, Sep 15 - Wed, Sep 23
Alaska Airlines Logo
6:36 pm - 2:26 pm
MSO
-
STL
18h 50m
1 stop
Alaska Airlines Logo
6:41 am - 3:23 pm
STL
-
MSO
9h 42m
1 stop
$349Alaska Airlines
Wed, Sep 23 - Sun, Sep 27
Alaska Airlines Logo
1:53 pm - 11:59 pm
MSO
-
STL
9h 06m
1 stop
Alaska Airlines Logo
7:00 am - 2:59 pm
STL
-
MSO
8h 59m
1 stop
$374Alaska Airlines
Wed, Apr 15 - Wed, Apr 29

Delta flights from Montana to St. Louis

Our best Delta deals on Montana to St. Louis flight tickets
Delta
Apr 10
BZN5:20 amBozeman Gallatin Field
6h 57m
1 stop
STL1:17 pmLambert-St Louis
Apr 14
STL6:00 amLambert-St Louis
8h 36m
1 stop
BZN1:36 pmBozeman Gallatin Field
$278
Delta
Apr 29
FCA6:10 pmKalispell Glacier Park
5h 15m
1 stop
STL12:25 amLambert-St Louis
May 6
STL6:45 pmLambert-St Louis
5h 42m
1 stop
FCA11:27 pmKalispell Glacier Park
$297
Delta
May 8
BZN6:35 pmBozeman Gallatin Field
4h 55m
1 stop
STL12:30 amLambert-St Louis
May 11
STL7:59 pmLambert-St Louis
5h 00m
1 stop
BZN11:59 pmBozeman Gallatin Field
$308

United Airlines flights from Montana to St. Louis

Our best United Airlines deals on Montana to St. Louis flight tickets
United Airlines
Jun 26
BZN4:29 pmBozeman Gallatin Field
6h 28m
1 stop
STL11:57 pmLambert-St Louis
Jul 6
STL5:10 amLambert-St Louis
5h 27m
1 stop
BZN9:37 amBozeman Gallatin Field
$303
United Airlines
May 16
FCA2:33 pmKalispell Glacier Park
5h 10m
1 stop
STL8:43 pmLambert-St Louis
Aug 9
STL5:10 amLambert-St Louis
5h 51m
1 stop
FCA10:01 amKalispell Glacier Park
$316
United Airlines
Apr 14
BIL2:35 pmBillings Logan Intl
5h 19m
1 stop
STL8:54 pmLambert-St Louis
Apr 18
STL8:54 amLambert-St Louis
5h 29m
1 stop
BIL1:23 pmBillings Logan Intl
$349

momondo Fare Finder

 
Customize your flight search to find flights from Montana 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 31, 2026.
Use the filters below to find and compare flights from Montana to St. Louis that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

BozemanSt. Louis

BZN - STL

BZNSTL

Bozeman Gallatin Field

Tue 6/9

1:30 pm-11:45 pm

1 stop9h 15m

Lambert-St Louis

Tue 6/16

6:55 pm-12:45 am

1 stop6h 50m

$227

BozemanSt. Louis

BZN - STL

BZNSTL

Bozeman Gallatin Field

Tue 6/9

1:30 pm-11:55 pm

2 stops9h 25m

Lambert-St Louis

Tue 6/16

6:55 pm-12:45 am

1 stop6h 50m

$232

BozemanSt. Louis

BZN - STL

BZNSTL

Bozeman Gallatin Field

Mon 4/27

4:20 pm-11:50 pm

1 stop6h 30m

Lambert-St Louis

Mon 5/4

6:45 pm-11:00 pm

1 stop5h 15m

$271

BozemanSt. Louis

BZN - STL

BZNSTL

Bozeman Gallatin Field

Fri 4/10

5:20 am-1:17 pm

1 stop6h 57m

Lambert-St Louis

Tue 4/14

6:00 am-1:36 pm

1 stop8h 36m

$278
Quickest round-trip

KalispellSt. Louis

FCA - STL

FCASTL

Kalispell Glacier Park

Wed 4/29

6:10 pm-12:25 am

1 stop5h 15m

Lambert-St Louis

Wed 5/6

6:45 pm-11:27 pm

1 stop5h 42m

$297

BozemanSt. Louis

BZN - STL

BZNSTL

Bozeman Gallatin Field

Fri 6/26

4:29 pm-11:57 pm

1 stop6h 28m

Lambert-St Louis

Mon 7/6

5:10 am-9:37 am

1 stop5h 27m

$303

KalispellSt. Louis

FCA - STL

FCASTL

Kalispell Glacier Park

Sat 5/16

2:33 pm-8:43 pm

1 stop5h 10m

Lambert-St Louis

Sun 8/9

5:10 am-10:01 am

1 stop5h 51m

$316

BillingsSt. Louis

BIL - STL

BILSTL

Billings Logan Intl

Tue 9/15

7:00 am-2:45 pm

1 stop6h 45m

Lambert-St Louis

Wed 9/23

7:01 am-12:40 pm

1 stop6h 39m

$319

MissoulaSt. Louis

MSO - STL

MSOSTL

Missoula Johnson-Bell Field

Wed 9/23

6:36 pm-2:26 pm

1 stop18h 50m

Lambert-St Louis

Sun 9/27

6:41 am-3:23 pm

1 stop9h 42m

$349

MissoulaSt. Louis

MSO - STL

MSOSTL

Missoula Johnson-Bell Field

Wed 4/15

1:53 pm-11:59 pm

1 stop9h 06m

Lambert-St Louis

Wed 4/29

7:00 am-2:59 pm

1 stop8h 59m

$374

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 Montana 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, February is the cheapest month to fly from Montana to St. Louis. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $287. The month of November is another great option to travel to St. Louis, with average flight prices from Montana averaging around $310.

Cheap Montana to St. Louis flight deals and tips

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

Fastest flight time

4h 33m

Direct flights

None
The fastest flight from Montana to St. Louis takes 4h 33m
There are no direct flights from Montana to St. Louis. There are no popular flight routes from Montana to St. Louis.
Search flight deals

  • When did momondo last update prices for flights from Montana to Lambert-St Louis Airport?

    Prices for flights from Montana to Lambert-St Louis Airport were last updated today.

  • How many operators does momondo search for flights from Montana to Lambert-St Louis Airport?

  • How old do you have to be to fly from Montana to Lambert-St Louis Airport?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Montana to Lambert-St Louis Airport.

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

    The travel and health documents you'll need for your trip to Lambert-St Louis Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Lambert-St Louis Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Best airlines flying from Montana to St. Louis

Compare and see reviews for airlines that fly from Montana to St. Louis with momondo
Airline
Rating
Free Cancellation
Price
DeltaPriceFrom $128Free CancellationRating
7.9
8,360 reviews
Search Delta flights
SouthwestPriceFrom $210Free CancellationRating
8.0
4,329 reviews
Search Southwest flights
United AirlinesPriceFrom $249Free CancellationRating
7.4
9,517 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
Alton
Wentzville
Fenton
Farmington
Clayton
Festus
Eureka
Edwardsville
Litchfield
Shrewsbury
Grafton

Why use momondo?

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

Finding the right flight to St. Louis from Montana is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to St. Louis quick and easy, saving you time and money.

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

Yes. momondo allows you to filter the results for Montana to St. Louis flights to just show those with flexible booking policies.

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

momondo provides multiple filters to help you find the best flight to St. Louis from Montana. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

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

Yes. momondo can track prices for Montana to St. Louis flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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