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Cheap flights from Montana to St. Louis from $111

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 2/16. 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 Montana to St. Louis

Cheap round-trip flights

Enter your travel dates to find the best prices.
Southwest Logo
12:45 pm - 9:55 pm
BZN
-
STL
8h 10m1 stop
Southwest Logo
6:20 am - 10:30 am
STL
-
BZN
5h 10m1 stop
$211Southwest
Fri, Feb 6 - Sun, Feb 8
Multiple Airlines Logo
9:06 pm - 12:12 pm
FCA
-
STL
14h 06m1 stop
Multiple Airlines Logo
12:37 pm - 8:16 pm
STL
-
FCA
8h 39m1 stop
$219Multiple Airlines
Thu, Jan 8 - Sun, Jan 11
Delta Logo
3:23 pm - 11:25 pm
FCA
-
STL
7h 02m1 stop
Delta Logo
5:00 pm - 11:18 pm
STL
-
FCA
7h 18m1 stop
$257Delta
Thu, Jan 8 - Sat, Jan 10
Delta Logo
3:23 pm - 11:25 pm
FCA
-
STL
7h 02m1 stop
Delta Logo
3:40 pm - 11:18 pm
STL
-
FCA
8h 38m2 stops
$262Delta
Thu, Jan 8 - Sat, Jan 10
Alaska Airlines Logo
3:03 pm - 1:54 pm
BZN
-
STL
21h 51m1 stop
Alaska Airlines Logo
2:50 pm - 11:56 pm
STL
-
BZN
10h 06m1 stop
$266Alaska Airlines
Sat, Jan 31 - Tue, Feb 3
Delta Logo
3:23 pm - 11:25 pm
FCA
-
STL
7h 02m1 stop
Delta Logo
5:00 pm - 11:18 pm
STL
-
FCA
7h 18m1 stop
$268Delta
Wed, Jan 7 - Sat, Jan 10
United Airlines Logo
12:05 pm - 11:59 pm
BZN
-
STL
10h 54m1 stop
United Airlines Logo
8:30 am - 9:33 pm
STL
-
BZN
14h 03m2 stops
$270United Airlines
Fri, Feb 6 - Sun, Feb 8
Alaska Airlines Logo
11:22 am - 1:54 pm
BZN
-
STL
25h 32m1 stop
Alaska Airlines Logo
2:50 pm - 11:56 pm
STL
-
BZN
10h 06m1 stop
$276Alaska Airlines
Sat, Jan 31 - Tue, Feb 3
Multiple Airlines Logo
9:06 pm - 12:12 pm
FCA
-
STL
14h 06m1 stop
Multiple Airlines Logo
3:43 pm - 8:16 pm
STL
-
FCA
29h 33m2 stops
$283Multiple Airlines
Sun, Jan 11 - Wed, Jan 14
United Airlines Logo
8:45 am - 4:03 pm
BZN
-
STL
6h 18m1 stop
United Airlines Logo
9:57 am - 9:33 pm
STL
-
BZN
12h 36m2 stops
$296United Airlines
Sat, Jan 31 - Tue, Feb 3

Alaska Airlines flights from Montana to St. Louis

Our best Alaska Airlines deals on Montana to St. Louis flight tickets
Alaska Airlines
Jan 31
BZN3:03 pmBozeman Gallatin Field
21h 51m
1 stop
STL1:54 pmLambert-St Louis
Feb 3
STL2:50 pmLambert-St Louis
10h 06m
1 stop
BZN11:56 pmBozeman Gallatin Field
$266
Find similar
Alaska Airlines
Jan 21
MSO6:23 amMissoula Johnson-Bell Field
6h 31m
1 stop
STL1:54 pmLambert-St Louis
Jan 24
STL6:19 pmLambert-St Louis
20h 04m
2 stops
MSO1:23 pmMissoula Johnson-Bell Field
$383
Find similar
Alaska Airlines
Jan 21
MSO6:23 amMissoula Johnson-Bell Field
6h 31m
1 stop
STL1:54 pmLambert-St Louis
Jan 24
STL6:19 pmLambert-St Louis
19h 04m
1 stop
MSO12:23 pmMissoula Johnson-Bell Field
$397
Find similar

United Airlines flights from Montana to St. Louis

Our best United Airlines deals on Montana to St. Louis flight tickets
United Airlines
Feb 6
BZN12:05 pmBozeman Gallatin Field
10h 54m
1 stop
STL11:59 pmLambert-St Louis
Feb 8
STL8:30 amLambert-St Louis
14h 03m
2 stops
BZN9:33 pmBozeman Gallatin Field
$270
Find similar
United Airlines
Jan 31
BZN6:15 amBozeman Gallatin Field
12h 12m
2 stops
STL7:27 pmLambert-St Louis
Feb 3
STL8:45 amLambert-St Louis
5h 41m
1 stop
BZN1:26 pmBozeman Gallatin Field
$296
Find similar
United Airlines
Jan 31
BZN6:15 amBozeman Gallatin Field
12h 12m
2 stops
STL7:27 pmLambert-St Louis
Feb 3
STL9:57 amLambert-St Louis
12h 36m
2 stops
BZN9:33 pmBozeman Gallatin Field
$301
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 December 11, 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

Fri 2/6

12:45 pm-9:55 pm

1 stop8h 10m

Lambert-St Louis

Sun 2/8

6:20 am-10:30 am

1 stop5h 10m

$211

KalispellSt. Louis

FCA - STL

FCASTL

Kalispell Glacier Park

Thu 1/8

9:06 pm-12:12 pm

1 stop14h 06m

Lambert-St Louis

Sun 1/11

12:37 pm-8:16 pm

1 stop8h 39m

$219

KalispellSt. Louis

FCA - STL

FCASTL

Kalispell Glacier Park

Thu 1/8

3:23 pm-11:25 pm

1 stop7h 02m

Lambert-St Louis

Sat 1/10

5:00 pm-11:18 pm

1 stop7h 18m

$257

KalispellSt. Louis

FCA - STL

FCASTL

Kalispell Glacier Park

Thu 1/8

3:23 pm-11:25 pm

1 stop7h 02m

Lambert-St Louis

Sat 1/10

3:40 pm-11:18 pm

2 stops8h 38m

$262

BozemanSt. Louis

BZN - STL

BZNSTL

Bozeman Gallatin Field

Sat 1/31

3:03 pm-1:54 pm

1 stop21h 51m

Lambert-St Louis

Tue 2/3

2:50 pm-11:56 pm

1 stop10h 06m

$266

KalispellSt. Louis

FCA - STL

FCASTL

Kalispell Glacier Park

Wed 1/7

3:23 pm-11:25 pm

1 stop7h 02m

Lambert-St Louis

Sat 1/10

5:00 pm-11:18 pm

1 stop7h 18m

$268

BozemanSt. Louis

BZN - STL

BZNSTL

Bozeman Gallatin Field

Fri 2/6

12:05 pm-11:59 pm

1 stop10h 54m

Lambert-St Louis

Sun 2/8

8:30 am-9:33 pm

2 stops14h 03m

$270

BozemanSt. Louis

BZN - STL

BZNSTL

Bozeman Gallatin Field

Sat 1/31

11:22 am-1:54 pm

1 stop25h 32m

Lambert-St Louis

Tue 2/3

2:50 pm-11:56 pm

1 stop10h 06m

$276

KalispellSt. Louis

FCA - STL

FCASTL

Kalispell Glacier Park

Sun 1/11

9:06 pm-12:12 pm

1 stop14h 06m

Lambert-St Louis

Wed 1/14

3:43 pm-8:16 pm

2 stops29h 33m

$283

BozemanSt. Louis

BZN - STL

BZNSTL

Bozeman Gallatin Field

Sat 1/31

8:45 am-4:03 pm

1 stop6h 18m

Lambert-St Louis

Tue 2/3

9:57 am-9:33 pm

2 stops12h 36m

$296

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 16 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, April 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 $319. The month of October is another great option to travel to St. Louis, with average flight prices from Montana averaging around $338.

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

Fastest flight time

5h 13m

Direct flights

None
The fastest flight from Montana to St. Louis takes 5h 13m
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 $205Free CancellationRating
7.9
8,009 reviews
Search Delta flights
United AirlinesPriceFrom $249Free CancellationRating
7.4
9,095 reviews
Search United Airlines flights
SouthwestPriceFrom $308Free CancellationRating
7.9
4,252 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
Hermann
Fairview Heights
Maryland Heights
O'Fallon
Florissant
Fenton
Wentzville
St. Peters
Collinsville
Alton
Farmington
Festus
Clayton
Glencoe
Edwardsville
Eureka
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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