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Cheap flights from St. Louis to Montana from $154

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 10/19. 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 St. Louis to Montana

Cheap round-trip flights

Alaska Airlines Logo
3:57 pm - 11:58 pmSTL-FCA
9h 01m1 stop
Alaska Airlines Logo
2:37 pm - 12:03 amFCA-STL
8h 26m1 stop
$228Alaska Airlines
Find Deal
Tue, Oct 21 - Thu, Oct 23
Delta Logo
12:14 pm - 10:14 pmSTL-BZN
11h 00m2 stops
Delta Logo
7:25 am - 8:51 amBZN-STL
24h 26m2 stops
$274Delta
Find Deal
Sat, Nov 1 - Tue, Nov 4
Southwest Logo
5:05 pm - 11:25 pmSTL-BZN
7h 20m2 stops
Southwest Logo
5:00 am - 12:10 pmBZN-STL
6h 10m1 stop
$312Southwest
Find Deal
Wed, Oct 29 - Sun, Nov 2
United Airlines Logo
4:50 pm - 10:21 pmSTL-BTM
6h 31m1 stop
United Airlines Logo
9:47 am - 4:28 pmBTM-STL
5h 41m1 stop
$313United Airlines
Find Deal
Sat, Oct 25 - Fri, Oct 31
United Airlines Logo
6:30 am - 11:35 amSTL-FCA
6h 05m1 stop
United Airlines Logo
6:30 am - 6:57 pmFCA-STL
11h 27m2 stops
$322United Airlines
Find Deal
Tue, Oct 21 - Thu, Oct 23
Multiple Airlines Logo
4:51 pm - 4:58 pmSTL-FCA
25h 07m1 stop
Multiple Airlines Logo
5:48 pm - 9:40 amFCA-STL
14h 52m2 stops
$349Multiple Airlines
Find Deal
Sat, Oct 25 - Sun, Nov 2
Multiple Airlines Logo
4:58 pm - 9:17 amSTL-BZN
17h 19m1 stop
Multiple Airlines Logo
11:03 am - 6:36 pmBZN-STL
30h 33m2 stops
$352Multiple Airlines
Find Deal
Sat, Oct 4 - Mon, Oct 6
Southwest Logo
2:40 pm - 10:45 pmSTL-BZN
9h 05m2 stops
Southwest Logo
5:30 pm - 12:30 amBZN-STL
6h 00m1 stop
$364Southwest
Find Deal
Mon, Dec 15 - Fri, Dec 19
American Airlines Logo
5:11 am - 12:10 pmSTL-BZN
7h 59m1 stop
American Airlines Logo
4:54 pm - 11:54 pmBZN-STL
6h 00m1 stop
$366American Airlines
Find Deal
Sun, Oct 12 - Sun, Oct 19
American Airlines Logo
1:20 pm - 8:02 pmSTL-MSO
7h 42m1 stop
American Airlines Logo
7:01 am - 5:10 pmMSO-STL
9h 09m1 stop
$464American Airlines
Find Deal
Fri, Dec 12 - Fri, Dec 19

Southwest flights from St. Louis to Montana

Our best Southwest deals on St. Louis to Montana flight tickets
Southwest
Oct 29
STL5:05 pmLambert-St Louis
7h 20m
2 stops
BZN11:25 pmBozeman Gallatin Field
Nov 2
BZN5:00 amBozeman Gallatin Field
6h 10m
1 stop
STL12:10 pmLambert-St Louis
$312
Find similar
Southwest
Dec 15
STL2:40 pmLambert-St Louis
9h 05m
2 stops
BZN10:45 pmBozeman Gallatin Field
Dec 19
BZN5:30 pmBozeman Gallatin Field
6h 00m
1 stop
STL12:30 amLambert-St Louis
$364
Find similar
Southwest
Oct 31
STL1:05 pmLambert-St Louis
9h 15m
2 stops
BZN9:20 pmBozeman Gallatin Field
Nov 3
BZN5:30 amBozeman Gallatin Field
7h 55m
2 stops
STL2:25 pmLambert-St Louis
$408
Find similar

Alaska Airlines flights from St. Louis to Montana

Our best Alaska Airlines deals on St. Louis to Montana flight tickets
Alaska Airlines
Oct 21
STL3:57 pmLambert-St Louis
9h 01m
1 stop
FCA11:58 pmKalispell Glacier Park
Oct 23
FCA2:37 pmKalispell Glacier Park
8h 26m
1 stop
STL12:03 amLambert-St Louis
$228
Find similar
Alaska Airlines
Oct 31
STL7:00 amLambert-St Louis
8h 08m
1 stop
BZN2:08 pmBozeman Gallatin Field
Nov 3
BZN3:02 pmBozeman Gallatin Field
7h 57m
1 stop
STL11:59 pmLambert-St Louis
$288
Find similar
Alaska Airlines
Oct 21
STL3:57 pmLambert-St Louis
9h 01m
1 stop
FCA11:58 pmKalispell Glacier Park
Oct 24
FCA2:37 pmKalispell Glacier Park
8h 26m
1 stop
STL12:03 amLambert-St Louis
$292
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 September 24, 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. LouisKalispell

STL - FCA

STLFCA

Lambert-St Louis

Tue 10/21

3:57 pm-11:58 pm

1 stop9h 01m

Kalispell Glacier Park

Thu 10/23

2:37 pm-12:03 am

1 stop8h 26m

$228

St. LouisBozeman

STL - BZN

STLBZN

Lambert-St Louis

Sat 11/1

12:14 pm-10:14 pm

2 stops11h 00m

Bozeman Gallatin Field

Tue 11/4

7:25 am-8:51 am

2 stops24h 26m

$274

St. LouisBozeman

STL - BZN

STLBZN

Lambert-St Louis

Wed 10/29

5:05 pm-11:25 pm

2 stops7h 20m

Bozeman Gallatin Field

Sun 11/2

5:00 am-12:10 pm

1 stop6h 10m

$312

St. LouisButte

STL - BTM

STLBTM

Lambert-St Louis

Sat 10/25

4:50 pm-10:21 pm

1 stop6h 31m

Butte Silver Bow Co

Fri 10/31

9:47 am-4:28 pm

1 stop5h 41m

$313

St. LouisKalispell

STL - FCA

STLFCA

Lambert-St Louis

Tue 10/21

6:30 am-11:35 am

1 stop6h 05m

Kalispell Glacier Park

Thu 10/23

6:30 am-6:57 pm

2 stops11h 27m

$322

St. LouisKalispell

STL - FCA

STLFCA

Lambert-St Louis

Sat 10/25

4:51 pm-4:58 pm

1 stop25h 07m

Kalispell Glacier Park

Sun 11/2

5:48 pm-9:40 am

2 stops14h 52m

$349

St. LouisBozeman

STL - BZN

STLBZN

Lambert-St Louis

Sat 10/4

4:58 pm-9:17 am

1 stop17h 19m

Bozeman Gallatin Field

Mon 10/6

11:03 am-6:36 pm

2 stops30h 33m

$352

St. LouisBozeman

STL - BZN

STLBZN

Lambert-St Louis

Mon 12/15

2:40 pm-10:45 pm

2 stops9h 05m

Bozeman Gallatin Field

Fri 12/19

5:30 pm-12:30 am

1 stop6h 00m

$364

St. LouisBozeman

STL - BZN

STLBZN

Lambert-St Louis

Sun 10/12

5:11 am-12:10 pm

1 stop7h 59m

Bozeman Gallatin Field

Sun 10/19

4:54 pm-11:54 pm

1 stop6h 00m

$366

St. LouisMissoula

STL - MSO

STLMSO

Lambert-St Louis

Fri 12/12

1:20 pm-8:02 pm

1 stop7h 42m

Missoula Johnson-Bell Field

Fri 12/19

7:01 am-5:10 pm

1 stop9h 09m

$464

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 $366.

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 $417 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 $340 on momondo.

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

You could potentially save up to 23% 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

Direct flights

None
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
10,000 reviews
Search American Airlines flights
Alaska AirlinesPriceFrom $257Free CancellationRating
8.0
10,000 reviews
Search Alaska Airlines flights
DeltaPriceFrom $268Free CancellationRating
7.9
7,973 reviews
Search Delta flights
United AirlinesPriceFrom $278Free CancellationRating
7.4
8,928 reviews
Search United Airlines flights
SouthwestPriceFrom $336Free CancellationRating
8.0
4,244 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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