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$124+ Cheap flights from St. Louis (STL) to Montana

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/23. Fares are subject to change and may not be available on all flights or dates of travel.
STL — BZN
Oct 16 — Oct 231
Thu 10/16
Thu 10/23
1 adult, Economy
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Cheap flight deals from St. Louis to Montana

Keep the following information in mind while searching for St. Louis to Montana flight deals. Data was last updated September 16, 2025.

Round-trip from

$257
(Delta)

One-way from

$124
(United Airlines)

Popular in

October

Cheapest in

August

Average price

$371
From Lambert-St Louis to Montana
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One-way flight from Lambert-St Louis to Montana
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Highest demand for flights based on searches. 1% potential increase in price ($7 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($7 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find flight deals from St. Louis to Montana

Cheapest flights from St. Louis to Montana
Explore the most affordable flight options available from St. Louis to Montana. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 16, 2025.

This Delta deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/38:53 amSTL - FCA
1 stop6h 36mDelta
Wed 11/53:24 pmFCA - STL
1 stop6h 43mDelta
Deal found 9/15$257
This Delta deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/48:53 amSTL - FCA
1 stop6h 36mDelta
Wed 11/512:00 pmFCA - STL
2 stops10h 07mDelta
Deal found 9/15$262
This United Airlines deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/44:55 pmSTL - FCA
1 stop5h 49mUnited Airlines
Sat 11/86:10 amFCA - STL
1 stop5h 29mUnited Airlines
Deal found 9/15$281
This United Airlines deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/44:55 pmSTL - FCA
1 stop5h 49mUnited Airlines
Fri 11/72:38 pmFCA - STL
1 stop6h 16mUnited Airlines
Deal found 9/15$288
This Delta deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/48:53 amSTL - FCA
1 stop6h 36mDelta
Sat 11/83:24 pmFCA - STL
1 stop6h 43mDelta
Deal found 9/16$291
This Delta deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/107:56 pmSTL - BZN
1 stop5h 21mDelta
Sun 12/146:00 amBZN - STL
1 stop5h 03mDelta
Deal found 9/15$292
This Delta deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/16:00 amSTL - BZN
2 stops9h 21mDelta
Tue 11/411:40 amBZN - STL
1 stop6h 05mDelta
Deal found 9/14$295
This Trip.com deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/317:00 amSTL - BZN
1 stop8h 08mHawaiian Airlines
Mon 11/33:02 pmBZN - STL
1 stop7h 57mHawaiian Airlines
Deal found 9/16$297
This Delta deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/38:53 amSTL - FCA
1 stop6h 36mDelta
Fri 11/76:10 pmFCA - STL
2 stops14h 05mDelta
Deal found 9/15$303
This Kiwi.com deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/57:55 pmSTL - MSO
2 stops40h 14mMultiple Airlines
Fri 10/1010:26 pmMSO - STL
1 stop16h 30mMultiple Airlines
Deal found 9/15$303
This Alaska Airlines deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/317:00 amSTL - BZN
1 stop8h 08mAlaska Airlines
Sun 11/28:00 amBZN - STL
1 stop14h 59mAlaska Airlines
Deal found 9/16$306
This Delta deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/136:00 amSTL - BZN
1 stop8h 19mDelta
Mon 10/206:20 pmBZN - STL
1 stop5h 04mDelta
Deal found 9/15$307

Cheapflights 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, Cheapflights users made 2,558,603 searches. Data last updated September 16, 2025.
Use the filters below to find and compare flights from St. Louis to Montana that are best for you.

Fly from

St. Louis

Fly to

Montana

Route

Depart

Return

Price

St. LouisKalispell

STL - FCA

STLFCA

Lambert-St Louis

Mon 11/3

8:53 am-2:29 pm

1 stop6h 36m

Kalispell Glacier Park

Wed 11/5

12:00 pm-11:07 pm

2 stops10h 07m

$262

St. LouisKalispell

STL - FCA

STLFCA

Lambert-St Louis

Tue 11/4

6:00 am-5:28 pm

2 stops12h 28m

Kalispell Glacier Park

Thu 11/6

3:24 pm-11:07 pm

1 stop6h 43m

$262

St. LouisKalispell

STL - FCA

STLFCA

Lambert-St Louis

Tue 11/4

7:05 am-5:28 pm

2 stops11h 23m

Kalispell Glacier Park

Wed 11/5

12:00 pm-11:07 pm

2 stops10h 07m

$267

St. LouisKalispell

STL - FCA

STLFCA

Lambert-St Louis

Tue 11/4

4:55 pm-9:44 pm

1 stop5h 49m

Kalispell Glacier Park

Fri 11/7

2:38 pm-9:54 pm

1 stop6h 16m

$288

St. LouisKalispell

STL - FCA

STLFCA

Lambert-St Louis

Mon 11/3

8:53 am-2:29 pm

1 stop6h 36m

Kalispell Glacier Park

Sat 11/8

3:24 pm-11:07 pm

1 stop6h 43m

$291

St. LouisKalispell

STL - FCA

STLFCA

Lambert-St Louis

Tue 11/4

8:53 am-2:29 pm

1 stop6h 36m

Kalispell Glacier Park

Sat 11/8

3:24 pm-11:07 pm

1 stop6h 43m

$291

St. LouisBozeman

STL - BZN

STLBZN

Lambert-St Louis

Wed 11/19

5:00 am-11:55 am

1 stop7h 55m

Bozeman Gallatin Field

Sun 11/23

3:25 pm-11:35 pm

1 stop7h 10m

$292

St. LouisBozeman

STL - BZN

STLBZN

Lambert-St Louis

Fri 10/10

12:25 pm-6:58 pm

1 stop7h 33m

Bozeman Gallatin Field

Wed 10/15

4:30 pm-11:58 pm

1 stop6h 28m

$292

St. LouisBozeman

STL - BZN

STLBZN

Lambert-St Louis

Sat 11/1

5:30 pm-10:54 pm

1 stop6h 24m

Bozeman Gallatin Field

Tue 11/4

11:40 am-6:45 pm

1 stop6h 05m

$292

St. LouisBozeman

STL - BZN

STLBZN

Lambert-St Louis

Wed 12/10

6:15 am-10:50 am

1 stop5h 35m

Bozeman Gallatin Field

Sun 12/14

6:00 am-12:03 pm

1 stop5h 03m

$292

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/13

Showing 1-10 of 51 results
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Best time to book a flight from St. Louis to Montana

Have a flexible travel schedule? Discover the best time to fly to Montana from St. Louis with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from St. Louis to Montana

What is the cheapest month to book a flight from St. Louis to Montana?

Currently, October is the cheapest month in which you can book a flight from St. Louis to Montana (average of $371). Flying from St. Louis to Montana in May is currently the most expensive (average of $476). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from STL to MT?

Find hourly flight availability from St. Louis to Montana. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 16, 2025.

When flying from St. Louis to Montana, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Reviews of airlines servicing Montana

Get insights into the airlines that provide service to Montana. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Montana. Reviews last updated September 16, 2025.
Peruse reviews from past customers who have flown with Alaska Airlines, Southwest, and Delta from St. Louis to Montana to help guide your decision. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Food

7.1

Crew

8.5

Boarding

8.1

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Food

7.1

Crew

8.5

Boarding

8.1

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.
Southwest
8.0
Very good
4,242 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Food

7.1

Crew

8.5

Boarding

8.1

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.
Delta
8.0
Very good
7,957 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Food

7.1

Crew

8.5

Boarding

8.1

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.
United Airlines
7.4
Good
8,924 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Food

7.1

Crew

8.5

Boarding

8.1

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Food

7.1

Crew

8.5

Boarding

8.1

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.

Related info for your journey

Find useful and relevant information for your journey from St. Louis to Montana. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from St. Louis to Montana?

    Most people fly from Lambert-St Louis (STL) if they book a flight from St. Louis to Montana. Lambert-St Louis is conveniently located just 12.7 mi from St. Louis’s city center.

  • How long is the flight from St. Louis to Montana?

    A quick flight from St. Louis to Montana can take about 5h 49m. Delta provides one of the quickest options available for as low as $288. The distance between St. Louis and Montana is about 1358 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the cheapest airlines to fly from St. Louis to Montana one-way?

    To fly one-way, consider booking your trip with United Airlines, which is currently one of the cheapest options available, starting at $124. Delta flights start at $139 while deals on American Airlines start at $139 one-way.

  • What are the most popular routes from St. Louis to Montana?

    The most popular flight routes from St. Louis to Montana are Lambert-St Louis - Kalispell Glacier Park, Lambert-St Louis - Bozeman Gallatin Field and Lambert-St Louis - Missoula Johnson-Bell Field.

  • Can I find deals for flights from St. Louis to Montana that include hotel bookings?

    Yes. In addition to deals on St. Louis to Montana flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from St. Louis to Montana?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to Montana.

  • Can I find deals for business class flights from St. Louis to Montana?

    Yes. Cheapflights offers flight deals from St. Louis to Montana by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from St. Louis to Montana?

    Currently, October is the cheapest month in which you can book a flight from St. Louis to Montana (average of $371). Flying from St. Louis to Montana in May is currently the most expensive (average of $476). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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Alternative routes for St. Louis to Montana

See prices for flight routes from nearby airports that may be better suited for you.
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Top 5 airlines flying from St. Louis to Montana

Discover the top 5 airlines that operate flights from St. Louis to Montana. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated September 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$251Average$445FlexibilityNo cancel feeOn-time71%
Alaska AirlinesCheapest$257Average$471FlexibilityNo cancel feeOn-time75%
DeltaCheapest$276Average$433FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$278Average$560FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$336Average$477FlexibilityNo cancel feeOn-time63%

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