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Cheap flights from Montana to St. Louis 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 Montana to St. Louis departing on 12/23. 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

Alaska Airlines Logo
3:02 pm - 3:18 pmBZN-STL
23h 16m1 stop
Alaska Airlines Logo
7:00 am - 2:08 pmSTL-BZN
8h 08m1 stop
$306Alaska Airlines
Find Deal
Sat, Nov 8 - Tue, Nov 11
Delta Logo
2:29 pm - 10:04 pmBZN-STL
6h 35m1 stop
Delta Logo
6:00 am - 1:11 pmSTL-BZN
8h 11m1 stop
$307Delta
Find Deal
Wed, Nov 5 - Mon, Nov 10
Southwest Logo
5:30 am - 2:25 pmBZN-STL
7h 55m2 stops
Southwest Logo
5:30 am - 9:35 amSTL-BZN
5h 05m1 stop
$312Southwest
Find Deal
Wed, Dec 10 - Sun, Dec 14
United Airlines Logo
2:28 pm - 8:46 pmBZN-STL
5h 18m1 stop
United Airlines Logo
11:10 am - 6:58 pmSTL-BZN
8h 48m1 stop
$339United Airlines
Find Deal
Sat, Oct 11 - Fri, Oct 17
American Airlines Logo
1:52 pm - 8:09 amBZN-STL
17h 17m2 stops
American Airlines Logo
7:00 am - 1:02 pmSTL-BZN
7h 02m1 stop
$346American Airlines
Find Deal
Wed, Nov 5 - Mon, Nov 10
Multiple Airlines Logo
10:26 pm - 3:56 pmMSO-STL
16h 30m1 stop
Multiple Airlines Logo
11:07 am - 9:36 pmSTL-MSO
35h 29m2 stops
$352Multiple Airlines
Find Deal
Fri, Oct 17 - Thu, Oct 30
American Airlines Logo
1:52 pm - 8:09 amBZN-STL
17h 17m2 stops
American Airlines Logo
5:17 am - 1:02 pmSTL-BZN
8h 45m1 stop
$365American Airlines
Find Deal
Wed, Nov 5 - Mon, Nov 10
Southwest Logo
6:45 am - 5:00 pmBZN-STL
9h 15m2 stops
Southwest Logo
4:40 pm - 12:10 amSTL-BZN
8h 30m1 stop
$375Southwest
Find Deal
Sat, Oct 11 - Fri, Oct 17
Multiple Airlines Logo
9:04 pm - 9:07 amMSO-STL
11h 03m2 stops
Multiple Airlines Logo
2:42 pm - 9:36 pmSTL-MSO
7h 54m1 stop
$377Multiple Airlines
Find Deal
Mon, Oct 13 - Fri, Oct 31
United Airlines Logo
2:38 pm - 9:54 pmFCA-STL
6h 16m1 stop
United Airlines Logo
4:43 pm - 9:44 pmSTL-FCA
6h 01m1 stop
$384United Airlines
Find Deal
Wed, Nov 19 - Sun, Nov 23

Alaska Airlines flights from Montana to St. Louis

Our best Alaska Airlines deals on Montana to St. Louis flight tickets
Alaska Airlines
Nov 8
BZN3:02 pmBozeman Gallatin Field
23h 16m
1 stop
STL3:18 pmLambert-St Louis
Nov 11
STL7:00 amLambert-St Louis
8h 08m
1 stop
BZN2:08 pmBozeman Gallatin Field
$306
Find similar
Alaska Airlines
Oct 14
BZN3:04 pmBozeman Gallatin Field
7h 59m
1 stop
STL12:03 amLambert-St Louis
Oct 21
STL3:57 pmLambert-St Louis
22h 05m
2 stops
BZN1:02 pmBozeman Gallatin Field
$340
Find similar
Alaska Airlines
Nov 8
BZN4:02 pmBozeman Gallatin Field
22h 16m
2 stops
STL3:18 pmLambert-St Louis
Nov 11
STL7:00 amLambert-St Louis
8h 08m
1 stop
BZN2:08 pmBozeman Gallatin Field
$356
Find similar

Delta flights from Montana to St. Louis

Our best Delta deals on Montana to St. Louis flight tickets
Delta
Nov 5
BZN2:29 pmBozeman Gallatin Field
6h 35m
1 stop
STL10:04 pmLambert-St Louis
Nov 10
STL7:47 pmLambert-St Louis
5h 23m
1 stop
BZN12:10 amBozeman Gallatin Field
$307
Find similar
Delta
Oct 18
BIL6:25 amBillings Logan Intl
4h 09m
1 stop
STL11:34 amLambert-St Louis
Oct 25
STL5:30 pmLambert-St Louis
6h 35m
1 stop
BIL11:05 pmBillings Logan Intl
$333
Find similar
Delta
Dec 23
BZN3:20 pmBozeman Gallatin Field
7h 19m
1 stop
STL11:39 pmLambert-St Louis
Dec 30
STL6:59 pmLambert-St Louis
5h 37m
1 stop
BZN11:36 pmBozeman Gallatin Field
$363
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 September 22, 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

Sat 11/8

3:02 pm-3:18 pm

1 stop23h 16m

Lambert-St Louis

Tue 11/11

7:00 am-2:08 pm

1 stop8h 08m

$306

BozemanSt. Louis

BZN - STL

BZNSTL

Bozeman Gallatin Field

Wed 11/5

2:29 pm-10:04 pm

1 stop6h 35m

Lambert-St Louis

Mon 11/10

6:00 am-1:11 pm

1 stop8h 11m

$307

BozemanSt. Louis

BZN - STL

BZNSTL

Bozeman Gallatin Field

Wed 12/10

5:30 am-2:25 pm

2 stops7h 55m

Lambert-St Louis

Sun 12/14

5:30 am-9:35 am

1 stop5h 05m

$312

BozemanSt. Louis

BZN - STL

BZNSTL

Bozeman Gallatin Field

Sat 10/11

2:28 pm-8:46 pm

1 stop5h 18m

Lambert-St Louis

Fri 10/17

11:10 am-6:58 pm

1 stop8h 48m

$339

BozemanSt. Louis

BZN - STL

BZNSTL

Bozeman Gallatin Field

Wed 11/5

1:52 pm-8:09 am

2 stops17h 17m

Lambert-St Louis

Mon 11/10

7:00 am-1:02 pm

1 stop7h 02m

$346

MissoulaSt. Louis

MSO - STL

MSOSTL

Missoula Johnson-Bell Field

Fri 10/17

10:26 pm-3:56 pm

1 stop16h 30m

Lambert-St Louis

Thu 10/30

11:07 am-9:36 pm

2 stops35h 29m

$352

BozemanSt. Louis

BZN - STL

BZNSTL

Bozeman Gallatin Field

Wed 11/5

1:52 pm-8:09 am

2 stops17h 17m

Lambert-St Louis

Mon 11/10

5:17 am-1:02 pm

1 stop8h 45m

$365

BozemanSt. Louis

BZN - STL

BZNSTL

Bozeman Gallatin Field

Sat 10/11

6:45 am-5:00 pm

2 stops9h 15m

Lambert-St Louis

Fri 10/17

4:40 pm-12:10 am

1 stop8h 30m

$375

MissoulaSt. Louis

MSO - STL

MSOSTL

Missoula Johnson-Bell Field

Mon 10/13

9:04 pm-9:07 am

2 stops11h 03m

Lambert-St Louis

Fri 10/31

2:42 pm-9:36 pm

1 stop7h 54m

$377

KalispellSt. Louis

FCA - STL

FCASTL

Kalispell Glacier Park

Wed 11/19

2:38 pm-9:54 pm

1 stop6h 16m

Lambert-St Louis

Sun 11/23

4:43 pm-9:44 pm

1 stop6h 01m

$384

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, September 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 $359. The month of August is another great option to travel to St. Louis, with average flight prices from Montana averaging around $372.

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

Direct flights

None
There are no direct flights from Montana to St. Louis. There are no popular flight routes from Montana to St. Louis.
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  • 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
7,971 reviews
Search Delta flights
United AirlinesPriceFrom $268Free CancellationRating
7.4
8,922 reviews
Search United Airlines flights
SouthwestPriceFrom $364Free 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
Florissant
Maryland Heights
O'Fallon
Fenton
Collinsville
Wentzville
Alton
St. Peters
Farmington
Festus
Glencoe
Clayton
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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