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Cheap flights from St. Louis to Montana from $105

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to Montana departing on 1/21. 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

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Find the cheapest flights from St. Louis to Montana

Cheap round-trip flights

Enter your travel dates to find the best prices.
Alaska Airlines Logo
2:50 pm - 11:56 pm
STL
-
BZN
10h 06m1 stop
Alaska Airlines Logo
11:22 am - 1:54 pm
BZN
-
STL
25h 32m1 stop
$210Alaska Airlines
Wed, Jan 28 - Sat, Jan 31
United Airlines Logo
6:45 am - 2:42 pm
STL
-
BZN
8h 57m1 stop
United Airlines Logo
2:30 pm - 8:58 pm
BZN
-
STL
5h 28m1 stop
$211United Airlines
Mon, Jan 12 - Sun, Jan 18
United Airlines Logo
8:30 am - 9:33 pm
STL
-
BZN
14h 03m2 stops
United Airlines Logo
6:15 am - 1:16 pm
BZN
-
STL
6h 01m1 stop
$216United Airlines
Tue, Jan 13 - Sun, Jan 18
Alaska Airlines Logo
2:47 pm - 11:56 pm
STL
-
BZN
10h 09m1 stop
Alaska Airlines Logo
7:00 am - 11:59 pm
BZN
-
STL
15h 59m1 stop
$231Alaska Airlines
Thu, Feb 12 - Mon, Feb 16
United Airlines Logo
11:20 am - 9:33 pm
STL
-
BZN
11h 13m2 stops
United Airlines Logo
2:30 pm - 8:58 pm
BZN
-
STL
5h 28m1 stop
$250United Airlines
Wed, Jan 28 - Fri, Jan 30
Southwest Logo
5:00 am - 12:05 pm
STL
-
BZN
8h 05m1 stop
Southwest Logo
3:50 pm - 9:45 pm
BZN
-
STL
4h 55m1 stop
$261Southwest
Fri, Jan 16 - Wed, Jan 21
Delta Logo
3:40 pm - 11:18 pm
STL
-
FCA
8h 38m2 stops
Delta Logo
5:24 am - 1:48 pm
FCA
-
STL
7h 24m1 stop
$262Delta
Sat, Jan 17 - Wed, Jan 21
Delta Logo
3:40 pm - 11:18 pm
STL
-
FCA
8h 38m2 stops
Delta Logo
5:24 am - 4:45 pm
FCA
-
STL
10h 21m2 stops
$278Delta
Sat, Jan 17 - Wed, Jan 21
American Airlines Logo
7:15 am - 1:36 pm
STL
-
BIL
7h 21m1 stop
American Airlines Logo
2:15 pm - 10:59 pm
BIL
-
STL
7h 44m1 stop
$417American Airlines
Tue, Jan 13 - Sun, Jan 18
American Airlines Logo
9:59 am - 9:41 pm
STL
-
MSO
12h 42m2 stops
American Airlines Logo
7:00 am - 6:02 pm
MSO
-
STL
10h 02m2 stops
$1,119American Airlines
Wed, Feb 18 - Mon, Feb 23

American Airlines flights from St. Louis to Montana

Our best American Airlines deals on St. Louis to Montana flight tickets
American Airlines
Mar 13
STL6:00 amLambert-St Louis
7h 34m
1 stop
BZN12:34 pmBozeman Gallatin Field
Mar 17
BZN7:00 amBozeman Gallatin Field
5h 46m
1 stop
STL1:46 pmLambert-St Louis
$371
Find similar
American Airlines
Jan 13
STL7:15 amLambert-St Louis
7h 21m
1 stop
BIL1:36 pmBillings Logan Intl
Jan 18
BIL2:15 pmBillings Logan Intl
7h 44m
1 stop
STL10:59 pmLambert-St Louis
$417
Find similar
American Airlines
Dec 19
STL5:54 amLambert-St Louis
6h 15m
1 stop
BZN11:09 amBozeman Gallatin Field
Dec 21
BZN11:39 amBozeman Gallatin Field
6h 52m
1 stop
STL7:31 pmLambert-St Louis
$429
Find similar

Alaska Airlines flights from St. Louis to Montana

Our best Alaska Airlines deals on St. Louis to Montana flight tickets
Alaska Airlines
Jan 28
STL2:50 pmLambert-St Louis
10h 06m
1 stop
BZN11:56 pmBozeman Gallatin Field
Jan 30
BZN7:20 amBozeman Gallatin Field
14h 26m
1 stop
STL10:46 pmLambert-St Louis
$210
Find similar
Alaska Airlines
Feb 12
STL2:47 pmLambert-St Louis
10h 09m
1 stop
BZN11:56 pmBozeman Gallatin Field
Feb 16
BZN7:00 amBozeman Gallatin Field
15h 59m
1 stop
STL11:59 pmLambert-St Louis
$231
Find similar
Alaska Airlines
Apr 1
STL2:55 pmLambert-St Louis
10h 03m
1 stop
FCA11:58 pmKalispell Glacier Park
Apr 5
FCA6:40 amKalispell Glacier Park
6h 31m
1 stop
STL2:11 pmLambert-St Louis
$251
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from St. Louis to Montana 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 December 17, 2025.
Use the filters below to find and compare flights from St. Louis to Montana that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

St. LouisBozeman

STL - BZN

STLBZN

Lambert-St Louis

Wed 1/28

2:50 pm-11:56 pm

1 stop10h 06m

Bozeman Gallatin Field

Sat 1/31

11:22 am-1:54 pm

1 stop25h 32m

$210

St. LouisBozeman

STL - BZN

STLBZN

Lambert-St Louis

Mon 1/12

6:45 am-2:42 pm

1 stop8h 57m

Bozeman Gallatin Field

Sun 1/18

2:30 pm-8:58 pm

1 stop5h 28m

$211

St. LouisBozeman

STL - BZN

STLBZN

Lambert-St Louis

Tue 1/13

8:30 am-9:33 pm

2 stops14h 03m

Bozeman Gallatin Field

Sun 1/18

6:15 am-1:16 pm

1 stop6h 01m

$216

St. LouisBozeman

STL - BZN

STLBZN

Lambert-St Louis

Thu 2/12

2:47 pm-11:56 pm

1 stop10h 09m

Bozeman Gallatin Field

Mon 2/16

7:00 am-11:59 pm

1 stop15h 59m

$231

St. LouisBozeman

STL - BZN

STLBZN

Lambert-St Louis

Wed 1/28

11:20 am-9:33 pm

2 stops11h 13m

Bozeman Gallatin Field

Fri 1/30

2:30 pm-8:58 pm

1 stop5h 28m

$250

St. LouisBozeman

STL - BZN

STLBZN

Lambert-St Louis

Fri 1/16

5:00 am-12:05 pm

1 stop8h 05m

Bozeman Gallatin Field

Wed 1/21

3:50 pm-9:45 pm

1 stop4h 55m

$261

St. LouisKalispell

STL - FCA

STLFCA

Lambert-St Louis

Sat 1/17

3:40 pm-11:18 pm

2 stops8h 38m

Kalispell Glacier Park

Wed 1/21

5:24 am-1:48 pm

1 stop7h 24m

$262

St. LouisKalispell

STL - FCA

STLFCA

Lambert-St Louis

Sat 1/17

3:40 pm-11:18 pm

2 stops8h 38m

Kalispell Glacier Park

Wed 1/21

5:24 am-4:45 pm

2 stops10h 21m

$278

St. LouisBillings

STL - BIL

STLBIL

Lambert-St Louis

Tue 1/13

7:15 am-1:36 pm

1 stop7h 21m

Billings Logan Intl

Sun 1/18

2:15 pm-10:59 pm

1 stop7h 44m

$417

St. LouisMissoula

STL - MSO

STLMSO

Lambert-St Louis

Wed 2/18

9:59 am-9:41 pm

2 stops12h 42m

Missoula Johnson-Bell Field

Mon 2/23

7:00 am-6:02 pm

2 stops10h 02m

$1,119

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 Montana from

How to get the cheapest flight ticket from St. Louis to Montana

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 Montana?

The cheapest month to fly to Montana from St. Louis is in August. Flight prices, which tend to average around $336, are often lower during this time because this is during the off-season. The month of January is another great option to travel to Montana, with average flight prices from St. Louis averaging around $373.

What is the cheapest day to depart on your flight to Montana?

Our data shows that Tuesday is the least expensive day to fly to Montana. Tickets to fly out on this day can be as low as $366. The most expensive day to fly to Montana is Monday, with ticket prices averaging around $431.

What is the cheapest time of day to depart on your flight to Montana?

The cheapest time of day to fly to Montana is in the afternoon when flights can be purchased for as low as $400. In the evening is when there is more demand to fly to Montana, so prices are often more expensive at around $413 per ticket.

How far in advance should I book a flight to Montana?

You are more likely to see cheaper flights to Montana from St. Louis when booking weeks ahead of your departure date. In general, you can expect to find flights to Montana for around $427 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Montana from St. Louis for as low as $334 on momondo.

Can stopping save me money on St. Louis to Montana flights?

You could potentially save up to 11% on your flight if you consider stops on a St. Louis to Montana flight.

Cheap St. Louis to Montana flight deals and tips

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

Fastest flight time

5h 01m

Direct flights

None
The fastest flight from St. Louis to Montana takes 5h 01m
There are no direct flights from St. Louis to Montana. There are no popular flight routes from St. Louis to Montana.
Search flight deals

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

    Prices for flights from Lambert-St Louis Airport to Montana refresh daily.

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

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

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Lambert-St Louis Airport to Montana.

  • What documentation or ID do you need to fly to Montana?

    The travel and health documents you'll need for your trip to Montana 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 Montana. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Best airlines flying from St. Louis to Montana

Compare and see reviews for airlines that fly from St. Louis to Montana with momondo
Airline
Rating
Free Cancellation
Price
American AirlinesPriceFrom $251Free CancellationRating
7.2
11,049 reviews
Search American Airlines flights
Alaska AirlinesPriceFrom $257Free CancellationRating
8.0
11,469 reviews
Search Alaska Airlines flights
DeltaPriceFrom $266Free CancellationRating
7.9
8,008 reviews
Search Delta flights
United AirlinesPriceFrom $275Free CancellationRating
7.4
9,092 reviews
Search United Airlines flights
SouthwestPriceFrom $336Free CancellationRating
7.9
4,250 reviews
Search Southwest flights

Why use momondo?

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

It is quick and easy to find St. Louis to Montana flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Montana that suits you.

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

All flight searches from St. Louis to Montana on momondo can be filtered to show those which offer flexible booking policies.

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

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from St. Louis to Montana.

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

Of course. momondo tracks the price of St. Louis to Montana flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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