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Cheap flights from Montana to St. Louis from $136

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 6/6. 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.
United Airlines Logo
2:37 pm - 8:39 pm
BZN
-
STL
5h 02m
1 stop
United Airlines Logo
5:18 pm - 10:18 pm
STL
-
BZN
6h 00m
1 stop
$271United Airlines
Wed, Sep 23 - Sat, Sep 26
Delta Logo
1:00 pm - 9:06 pm
BZN
-
STL
7h 06m
1 stop
Delta Logo
5:00 pm - 10:08 pm
STL
-
BZN
6h 08m
1 stop
$285Delta
Sat, Jun 6 - Sat, Jun 13
Delta Logo
6:10 pm - 12:43 am
FCA
-
STL
5h 33m
1 stop
Delta Logo
3:57 pm - 8:16 pm
STL
-
FCA
5h 19m
1 stop
$297Delta
Tue, Jun 23 - Tue, Jun 30
Delta Logo
6:35 pm - 12:30 am
BZN
-
STL
4h 55m
1 stop
Delta Logo
5:36 pm - 11:44 pm
STL
-
BZN
7h 08m
1 stop
$299Delta
Thu, May 28 - Mon, Jun 1
United Airlines Logo
4:29 pm - 11:57 pm
BZN
-
STL
6h 28m
1 stop
United Airlines Logo
5:10 am - 9:37 am
STL
-
BZN
5h 27m
1 stop
$300United Airlines
Thu, Jun 11 - Wed, Jun 17
Southwest Logo
3:25 pm - 11:40 pm
BZN
-
STL
7h 15m
1 stop
Southwest Logo
9:00 am - 3:35 pm
STL
-
BZN
7h 35m
2 stops
$336Southwest
Wed, Sep 23 - Sat, Sep 26
Alaska Airlines Logo
8:00 am - 6:45 pm
BZN
-
STL
9h 45m
1 stop
Alaska Airlines Logo
4:12 pm - 10:42 pm
STL
-
BZN
7h 30m
1 stop
$339Alaska Airlines
Wed, Jun 3 - Sat, Jun 6
Southwest Logo
7:45 am - 5:40 pm
BZN
-
STL
8h 55m
2 stops
Southwest Logo
7:45 pm - 1:10 am
STL
-
BZN
6h 25m
1 stop
$345Southwest
Wed, Jul 29 - Mon, Aug 3
American Airlines Logo
2:18 pm - 9:42 pm
MSO
-
STL
6h 24m
1 stop
American Airlines Logo
5:21 am - 1:28 pm
STL
-
MSO
9h 07m
1 stop
$444American Airlines
Mon, May 25 - Fri, May 29
Alaska Airlines Logo
7:00 am - 6:38 pm
MSO
-
STL
10h 38m
1 stop
Alaska Airlines Logo
8:30 am - 10:59 pm
STL
-
MSO
15h 29m
2 stops
$454Alaska Airlines
Wed, Sep 23 - Mon, Sep 28

Delta flights from Montana to St. Louis

Our best Delta deals on Montana to St. Louis flight tickets
Delta
Jun 6
BZN1:00 pmBozeman Gallatin Field
7h 06m
1 stop
STL9:06 pmLambert-St Louis
Jun 13
STL5:00 pmLambert-St Louis
6h 08m
1 stop
BZN10:08 pmBozeman Gallatin Field
$285
Delta
Jun 23
FCA6:10 pmKalispell Glacier Park
5h 33m
1 stop
STL12:43 amLambert-St Louis
Jun 30
STL3:57 pmLambert-St Louis
5h 19m
1 stop
FCA8:16 pmKalispell Glacier Park
$297
Delta
May 28
BZN6:35 pmBozeman Gallatin Field
4h 55m
1 stop
STL12:30 amLambert-St Louis
Jun 1
STL5:36 pmLambert-St Louis
7h 08m
1 stop
BZN11:44 pmBozeman Gallatin Field
$299

Alaska Airlines flights from Montana to St. Louis

Our best Alaska Airlines deals on Montana to St. Louis flight tickets
Alaska Airlines
Jun 3
BZN8:00 amBozeman Gallatin Field
9h 45m
1 stop
STL6:45 pmLambert-St Louis
Jun 6
STL4:12 pmLambert-St Louis
7h 30m
1 stop
BZN10:42 pmBozeman Gallatin Field
$339
Alaska Airlines
Jul 29
BZN6:03 amBozeman Gallatin Field
13h 21m
2 stops
STL8:24 pmLambert-St Louis
Aug 3
STL5:13 pmLambert-St Louis
17h 33m
2 stops
BZN9:46 amBozeman Gallatin Field
$409
Alaska Airlines
Jun 3
BZN7:59 pmBozeman Gallatin Field
11h 51m
2 stops
STL8:50 amLambert-St Louis
Jun 6
STL4:12 pmLambert-St Louis
7h 30m
1 stop
BZN10:42 pmBozeman Gallatin Field
$424

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 May 15, 2026.
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

Cheapest round-trip

BozemanSt. Louis

BZN - STL

BZNSTL

Bozeman Gallatin Field

Wed 9/23

2:37 pm-8:39 pm

1 stop5h 02m

Lambert-St Louis

Sat 9/26

5:18 pm-10:18 pm

1 stop6h 00m

$271

BozemanSt. Louis

BZN - STL

BZNSTL

Bozeman Gallatin Field

Sat 6/6

1:00 pm-9:06 pm

1 stop7h 06m

Lambert-St Louis

Sat 6/13

5:00 pm-10:08 pm

1 stop6h 08m

$285
Quickest round-trip

KalispellSt. Louis

FCA - STL

FCASTL

Kalispell Glacier Park

Tue 6/23

6:10 pm-12:43 am

1 stop5h 33m

Lambert-St Louis

Tue 6/30

3:57 pm-8:16 pm

1 stop5h 19m

$297

BozemanSt. Louis

BZN - STL

BZNSTL

Bozeman Gallatin Field

Thu 5/28

6:35 pm-12:30 am

1 stop4h 55m

Lambert-St Louis

Mon 6/1

5:36 pm-11:44 pm

1 stop7h 08m

$299

BozemanSt. Louis

BZN - STL

BZNSTL

Bozeman Gallatin Field

Thu 6/11

4:29 pm-11:57 pm

1 stop6h 28m

Lambert-St Louis

Wed 6/17

5:10 am-9:37 am

1 stop5h 27m

$300

BozemanSt. Louis

BZN - STL

BZNSTL

Bozeman Gallatin Field

Wed 9/23

3:25 pm-11:40 pm

1 stop7h 15m

Lambert-St Louis

Sat 9/26

9:00 am-3:35 pm

2 stops7h 35m

$336

BozemanSt. Louis

BZN - STL

BZNSTL

Bozeman Gallatin Field

Wed 6/3

8:00 am-6:45 pm

1 stop9h 45m

Lambert-St Louis

Sat 6/6

4:12 pm-10:42 pm

1 stop7h 30m

$339

BozemanSt. Louis

BZN - STL

BZNSTL

Bozeman Gallatin Field

Wed 7/29

7:45 am-5:40 pm

2 stops8h 55m

Lambert-St Louis

Mon 8/3

7:45 pm-1:10 am

1 stop6h 25m

$345

MissoulaSt. Louis

MSO - STL

MSOSTL

Missoula Johnson-Bell Field

Mon 5/25

2:18 pm-9:42 pm

1 stop6h 24m

Lambert-St Louis

Fri 5/29

5:21 am-1:28 pm

1 stop9h 07m

$444

MissoulaSt. Louis

MSO - STL

MSOSTL

Missoula Johnson-Bell Field

Wed 9/23

7:00 am-6:38 pm

1 stop10h 38m

Lambert-St Louis

Mon 9/28

8:30 am-10:59 pm

2 stops15h 29m

$454

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, December 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 $128. The month of April is another great option to travel to St. Louis, with average flight prices from Montana averaging around $164.

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

4h 45m

Direct flights

None
The fastest flight from Montana to St. Louis takes 4h 45m
There are no direct flights from Montana to St. Louis. There are no popular flight routes from Montana to St. Louis.
Search flight deals

Frequently asked questions about flying from Montana to St. Louis

  • 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 $164Free CancellationRating
7.9
8,453 reviews
Search Delta flights
SouthwestPriceFrom $210Free CancellationRating
8.0
4,299 reviews
Search Southwest flights
United AirlinesPriceFrom $249Free CancellationRating
7.4
9,718 reviews
Search United Airlines 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
St. Peters
Collinsville
Alton
Wentzville
Fenton
Farmington
Festus
Clayton
Eureka
Litchfield
Edwardsville
Shrewsbury
Grafton

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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