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Cheap flights from Montana to St. Louis from $129

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 9/9. 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

Delta Logo
6:20 pm - 12:24 amBZN-STL
5h 04m1 stop
Delta Logo
6:59 pm - 12:10 amSTL-BZN
6h 11m1 stop
$257Delta
Find Deal
Wed, Nov 5 - Mon, Nov 10
American Airlines Logo
1:49 pm - 10:02 pmBZN-STL
7h 13m1 stop
American Airlines Logo
5:56 am - 7:15 pmSTL-BZN
14h 19m1 stop
$271American Airlines
Find Deal
Tue, Dec 23 - Tue, Dec 30
Southwest Logo
4:00 pm - 10:45 pmBZN-STL
5h 45m1 stop
Southwest Logo
5:35 am - 9:35 amSTL-BZN
5h 00m1 stop
$289Southwest
Find Deal
Fri, Oct 10 - Sun, Oct 12
Alaska Airlines Logo
4:02 pm - 11:59 pmBZN-STL
30h 57m2 stops
Alaska Airlines Logo
7:00 am - 2:08 pmSTL-BZN
8h 08m1 stop
$303Alaska Airlines
Find Deal
Wed, Nov 5 - Mon, Nov 10
Southwest Logo
6:00 am - 2:30 pmBZN-STL
7h 30m2 stops
Southwest Logo
4:40 pm - 12:10 amSTL-BZN
8h 30m1 stop
$305Southwest
Find Deal
Tue, Sep 23 - Thu, Oct 2
United Airlines Logo
5:15 pm - 11:53 pmFCA-STL
5h 38m1 stop
United Airlines Logo
5:15 am - 10:06 amSTL-FCA
5h 51m1 stop
$314United Airlines
Find Deal
Tue, Sep 2 - Tue, Sep 9
Alaska Airlines Logo
1:42 pm - 12:03 amBZN-STL
9h 21m2 stops
Alaska Airlines Logo
7:00 am - 2:08 pmSTL-BZN
8h 08m1 stop
$333Alaska Airlines
Find Deal
Fri, Oct 24 - Mon, Oct 27
United Airlines Logo
2:25 pm - 11:31 pmBZN-STL
8h 06m1 stop
United Airlines Logo
6:00 am - 1:12 pmSTL-BZN
8h 12m1 stop
$337United Airlines
Find Deal
Mon, Dec 22 - Wed, Dec 24
Hawaiian Airlines Logo
2:37 pm - 12:03 amFCA-STL
8h 26m1 stop
Hawaiian Airlines Logo
3:57 pm - 11:58 pmSTL-FCA
9h 01m1 stop
$386Hawaiian Airlines
Find Deal
Fri, Oct 10 - Mon, Oct 13
Hawaiian Airlines Logo
6:37 am - 3:01 pmMSO-STL
7h 24m1 stop
Hawaiian Airlines Logo
3:57 pm - 11:40 pmSTL-MSO
8h 43m1 stop
$434Hawaiian Airlines
Find Deal
Tue, Oct 7 - Thu, Oct 9

Southwest flights from Montana to St. Louis

Our best Southwest deals on Montana to St. Louis flight tickets
Southwest
Oct 10
BZN4:00 pmBozeman Gallatin Field
5h 45m
1 stop
STL10:45 pmLambert-St Louis
Oct 12
STL5:35 amLambert-St Louis
5h 00m
1 stop
BZN9:35 amBozeman Gallatin Field
$289
Find similar
Southwest
Sep 23
BZN6:00 amBozeman Gallatin Field
7h 30m
2 stops
STL2:30 pmLambert-St Louis
Oct 2
STL4:40 pmLambert-St Louis
8h 30m
1 stop
BZN12:10 amBozeman Gallatin Field
$305
Find similar
Southwest
Sep 3
BZN6:00 amBozeman Gallatin Field
4h 30m
1 stop
STL11:30 amLambert-St Louis
Sep 8
STL8:25 amLambert-St Louis
15h 10m
2 stops
BZN10:35 pmBozeman Gallatin Field
$314
Find similar

United Airlines flights from Montana to St. Louis

Our best United Airlines deals on Montana to St. Louis flight tickets
United Airlines
Sep 2
FCA5:15 pmKalispell Glacier Park
5h 38m
1 stop
STL11:53 pmLambert-St Louis
Sep 9
STL5:15 amLambert-St Louis
5h 51m
1 stop
FCA10:06 amKalispell Glacier Park
$314
Find similar
United Airlines
Dec 22
BZN2:25 pmBozeman Gallatin Field
8h 06m
1 stop
STL11:31 pmLambert-St Louis
Dec 24
STL6:00 amLambert-St Louis
8h 12m
1 stop
BZN1:12 pmBozeman Gallatin Field
$337
Find similar
United Airlines
Dec 17
BZN10:49 amBozeman Gallatin Field
10h 56m
2 stops
STL10:45 pmLambert-St Louis
Jan 6
STL6:45 amLambert-St Louis
5h 48m
1 stop
BZN11:33 amBozeman Gallatin Field
$342
Find similar

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 August 6, 2025.
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

BozemanSt. Louis

BZN - STL

BZNSTL

Bozeman Gallatin Field

Wed 11/5

6:20 pm-12:24 am

1 stop5h 04m

Lambert-St Louis

Mon 11/10

6:59 pm-12:10 am

1 stop6h 11m

$257

BozemanSt. Louis

BZN - STL

BZNSTL

Bozeman Gallatin Field

Tue 12/23

1:49 pm-10:02 pm

1 stop7h 13m

Lambert-St Louis

Tue 12/30

5:56 am-7:15 pm

1 stop14h 19m

$271

BozemanSt. Louis

BZN - STL

BZNSTL

Bozeman Gallatin Field

Fri 10/10

4:00 pm-10:45 pm

1 stop5h 45m

Lambert-St Louis

Sun 10/12

5:35 am-9:35 am

1 stop5h 00m

$289

BozemanSt. Louis

BZN - STL

BZNSTL

Bozeman Gallatin Field

Wed 11/5

4:02 pm-11:59 pm

2 stops30h 57m

Lambert-St Louis

Mon 11/10

7:00 am-2:08 pm

1 stop8h 08m

$303

BozemanSt. Louis

BZN - STL

BZNSTL

Bozeman Gallatin Field

Tue 9/23

6:00 am-2:30 pm

2 stops7h 30m

Lambert-St Louis

Thu 10/2

4:40 pm-12:10 am

1 stop8h 30m

$305

KalispellSt. Louis

FCA - STL

FCASTL

Kalispell Glacier Park

Tue 9/2

5:15 pm-11:53 pm

1 stop5h 38m

Lambert-St Louis

Tue 9/9

5:15 am-10:06 am

1 stop5h 51m

$314

BozemanSt. Louis

BZN - STL

BZNSTL

Bozeman Gallatin Field

Fri 10/24

1:42 pm-12:03 am

2 stops9h 21m

Lambert-St Louis

Mon 10/27

7:00 am-2:08 pm

1 stop8h 08m

$333

BozemanSt. Louis

BZN - STL

BZNSTL

Bozeman Gallatin Field

Mon 12/22

2:25 pm-11:31 pm

1 stop8h 06m

Lambert-St Louis

Wed 12/24

6:00 am-1:12 pm

1 stop8h 12m

$337

KalispellSt. Louis

FCA - STL

FCASTL

Kalispell Glacier Park

Fri 10/10

2:37 pm-12:03 am

1 stop8h 26m

Lambert-St Louis

Mon 10/13

3:57 pm-11:58 pm

1 stop9h 01m

$386

MissoulaSt. Louis

MSO - STL

MSOSTL

Missoula Johnson-Bell Field

Tue 10/7

6:37 am-3:01 pm

1 stop7h 24m

Lambert-St Louis

Thu 10/9

3:57 pm-11:40 pm

1 stop8h 43m

$434

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 $376. The month of November is another great option to travel to St. Louis, with average flight prices from Montana averaging around $376.

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 $391. 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 Tuesday because tickets tend to average around $522. 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 Montana in the afternoon is the least expensive time of day to depart. momondo users have found prices as low as $407 when looking at flights departing in the afternoon. In the morning is when there is more demand to fly to St. Louis, so prices are often more expensive at around $437 per ticket.

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

Best Price Found

$129

Fastest flight time

4h 30m

Direct flights

None

Airports in St. Louis

1 airport
The best one-way flight to St. Louis from Montana in the past 72 hours is $129. The best round-trip flight deal from Montana to St. Louis found on momondo in the last 72 hours is $257.
The fastest flight from Montana to St. Louis takes 4h 30m
There are no direct flights from Montana to St. Louis. Popular non-direct routes for this connection are Kalispell Glacier Park Airport - Lambert-St Louis Airport, Bozeman Gallatin Field Airport - Lambert-St Louis Airport and Billings Logan Intl Airport - Lambert-St Louis Airport.
There is 1 airport near St. Louis: Lambert-St Louis (STL)
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 $212Free CancellationRating
8.0
7,985 reviews
Search Delta flights
United AirlinesPriceFrom $268Free CancellationRating
7.4
8,917 reviews
Search United Airlines flights
Alaska AirlinesPriceFrom $280Free CancellationRating
8.0
10,000 reviews
Search Alaska Airlines flights
SouthwestPriceFrom $318Free CancellationRating
8.0
4,244 reviews
Search Southwest 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
Fairview Heights
Hermann
Maryland Heights
Florissant
Fenton
O'Fallon
Collinsville
Alton
Wentzville
St. Peters
Farmington
Festus
Glencoe
Eureka
Edwardsville
Clayton
Litchfield
Shrewsbury

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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