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Cheap flights from Montana to St. Louis from $104

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 3/4. 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
11:15 am - 7:05 pmBZN-STL
6h 50m1 stop
Southwest Logo
5:40 am - 10:20 amSTL-BZN
5h 40m1 stop
$209Southwest
Find Deal
jue., ene. 8 - dom., ene. 11
Southwest Logo
5:45 pm - 11:30 pmBZN-STL
4h 45m1 stop
Southwest Logo
2:35 pm - 10:15 pmSTL-BZN
8h 40m1 stop
$214Southwest
Find Deal
vie., dic. 12 - lun., ene. 12
Delta Logo
6:25 pm - 12:37 amBZN-STL
5h 12m1 stop
Delta Logo
7:30 am - 1:22 pmSTL-BZN
6h 52m1 stop
$257Delta
Find Deal
mar., abr. 7 - mié., abr. 8
Delta Logo
6:12 pm - 12:36 amFCA-STL
5h 24m1 stop
Delta Logo
6:30 am - 1:45 pmSTL-FCA
8h 15m1 stop
$257Delta
Find Deal
mié., abr. 15 - sáb., abr. 18
Multiple Airlines Logo
5:51 pm - 11:16 amFCA-STL
16h 25m1 stop
Multiple Airlines Logo
9:54 pm - 10:59 amSTL-FCA
14h 05m1 stop
$263Multiple Airlines
Find Deal
jue., nov. 20 - lun., nov. 24
Multiple Airlines Logo
10:06 am - 10:02 amMSO-STL
22h 56m2 stops
Multiple Airlines Logo
9:54 pm - 9:16 amSTL-MSO
12h 22m1 stop
$294Multiple Airlines
Find Deal
vie., nov. 21 - dom., nov. 23
United Airlines Logo
6:31 am - 9:55 pmFCA-STL
14h 24m2 stops
United Airlines Logo
4:30 pm - 9:30 pmSTL-FCA
6h 00m1 stop
$314United Airlines
Find Deal
mié., abr. 15 - sáb., abr. 18
Alaska Airlines Logo
4:10 pm - 11:56 pmHLN-STL
6h 46m1 stop
Alaska Airlines Logo
7:00 am - 3:43 pmSTL-HLN
9h 43m1 stop
$332Alaska Airlines
Find Deal
sáb., feb. 28 - mar., mar. 3
Alaska Airlines Logo
6:29 am - 2:27 pmMSO-STL
6h 58m1 stop
Alaska Airlines Logo
7:00 am - 3:26 pmSTL-MSO
9h 26m1 stop
$342Alaska Airlines
Find Deal
mié., dic. 10 - dom., dic. 14
United Airlines Logo
2:40 pm - 10:22 pmBZN-STL
6h 42m1 stop
United Airlines Logo
3:10 pm - 10:46 pmSTL-BZN
8h 36m1 stop
$399United Airlines
Find Deal
dom., dic. 28 - sáb., ene. 3

Delta flights from Montana to St. Louis

Our best Delta deals on Montana to St. Louis flight tickets
Delta
Apr 7
BZN6:25 pmBozeman Gallatin Field
5h 12m
1 stop
STL12:37 amLambert-St Louis
Apr 8
STL7:30 amLambert-St Louis
6h 52m
1 stop
BZN1:22 pmBozeman Gallatin Field
$257
Find similar
Delta
Apr 21
BZN6:25 pmBozeman Gallatin Field
5h 11m
1 stop
STL12:36 amLambert-St Louis
Apr 24
STL6:59 pmLambert-St Louis
6h 47m
1 stop
BZN12:46 amBozeman Gallatin Field
$288
Find similar
Delta
Apr 15
FCA3:00 pmKalispell Glacier Park
7h 01m
1 stop
STL11:01 pmLambert-St Louis
Apr 18
STL9:00 amLambert-St Louis
15h 02m
2 stops
FCA11:02 pmKalispell Glacier Park
$303
Find similar

Alaska Airlines flights from Montana to St. Louis

Our best Alaska Airlines deals on Montana to St. Louis flight tickets
Alaska Airlines
Feb 28
HLN4:10 pmHelena
6h 46m
1 stop
STL11:56 pmLambert-St Louis
Mar 3
STL7:00 amLambert-St Louis
9h 43m
1 stop
HLN3:43 pmHelena
$332
Find similar
Alaska Airlines
Dec 10
MSO6:29 amMissoula Johnson-Bell Field
6h 58m
1 stop
STL2:27 pmLambert-St Louis
Dec 14
STL7:00 amLambert-St Louis
9h 26m
1 stop
MSO3:26 pmMissoula Johnson-Bell Field
$342
Find similar
Alaska Airlines
Jan 8
MSO6:23 amMissoula Johnson-Bell Field
6h 31m
1 stop
STL1:54 pmLambert-St Louis
Jan 14
STL2:50 pmLambert-St Louis
23h 33m
2 stops
MSO1:23 pmMissoula Johnson-Bell Field
$343
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 noviembre 6, 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

jue. 1/8

11:15 am-7:05 pm

1 stop6h 50m

Lambert-St Louis

dom. 1/11

5:40 am-10:20 am

1 stop5h 40m

$209

BozemanSt. Louis

BZN - STL

BZNSTL

Bozeman Gallatin Field

vie. 12/12

5:45 pm-11:30 pm

1 stop4h 45m

Lambert-St Louis

lun. 1/12

2:35 pm-10:15 pm

1 stop8h 40m

$214

BozemanSt. Louis

BZN - STL

BZNSTL

Bozeman Gallatin Field

mar. 4/7

6:25 pm-12:37 am

1 stop5h 12m

Lambert-St Louis

mié. 4/8

7:30 am-1:22 pm

1 stop6h 52m

$257

KalispellSt. Louis

FCA - STL

FCASTL

Kalispell Glacier Park

mié. 4/15

6:12 pm-12:36 am

1 stop5h 24m

Lambert-St Louis

sáb. 4/18

6:30 am-1:45 pm

1 stop8h 15m

$257

KalispellSt. Louis

FCA - STL

FCASTL

Kalispell Glacier Park

jue. 11/20

5:51 pm-11:16 am

1 stop16h 25m

Lambert-St Louis

lun. 11/24

9:54 pm-10:59 am

1 stop14h 05m

$263

MissoulaSt. Louis

MSO - STL

MSOSTL

Missoula Johnson-Bell Field

vie. 11/21

10:06 am-10:02 am

2 stops22h 56m

Lambert-St Louis

dom. 11/23

9:54 pm-9:16 am

1 stop12h 22m

$294

KalispellSt. Louis

FCA - STL

FCASTL

Kalispell Glacier Park

mié. 4/15

6:31 am-9:55 pm

2 stops14h 24m

Lambert-St Louis

sáb. 4/18

4:30 pm-9:30 pm

1 stop6h 00m

$314

HelenaSt. Louis

HLN - STL

HLNSTL

Helena

sáb. 2/28

4:10 pm-11:56 pm

1 stop6h 46m

Lambert-St Louis

mar. 3/3

7:00 am-3:43 pm

1 stop9h 43m

$332

MissoulaSt. Louis

MSO - STL

MSOSTL

Missoula Johnson-Bell Field

mié. 12/10

6:29 am-2:27 pm

1 stop6h 58m

Lambert-St Louis

dom. 12/14

7:00 am-3:26 pm

1 stop9h 26m

$342

BozemanSt. Louis

BZN - STL

BZNSTL

Bozeman Gallatin Field

dom. 12/28

2:40 pm-10:22 pm

1 stop6h 42m

Lambert-St Louis

sáb. 1/3

3:10 pm-10:46 pm

1 stop8h 36m

$399

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, October 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 $338. The month of September is another great option to travel to St. Louis, with average flight prices from Montana averaging around $359.

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.
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
8,001 reviews
Search Delta flights
United AirlinesPriceFrom $249Free CancellationRating
7.4
9,007 reviews
Search United Airlines flights
SouthwestPriceFrom $310Free CancellationRating
8.0
4,241 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
Florissant
Maryland Heights
O'Fallon
Wentzville
Fenton
Collinsville
St. Peters
Alton
Farmington
Festus
Glencoe
Edwardsville
Clayton
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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