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$113+ 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 9/10. Fares are subject to change and may not be available on all flights or dates of travel.
STL — BZN
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
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 June 12, 2025.

Round-trip from

$227
(American Airlines)

One-way from

$113
(Alaska Airlines)

Popular in

December

Cheapest in

November

Average price

$420
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 ($5 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($16 potential savings vs. average RT price).
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Average for round-trip flights in June 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 June 12, 2025.

This American Airlines deal was found by Cheapflights users on 6/11. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/197:23 amSTL - FCA
1 stop6h 11mAmerican Airlines
Tue 8/263:49 pmFCA - STL
1 stop6h 25mAmerican Airlines
Deal found 6/11$227
This American Airlines deal was found by Cheapflights users on 6/12. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/276:06 amSTL - BZN
1 stop7h 33mAmerican Airlines
Wed 9/33:04 pmBZN - STL
1 stop5h 49mAmerican Airlines
Deal found 6/12$237
This Southwest deal was found by Cheapflights users on 6/12. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/276:45 amSTL - BZN
1 stop11h 05mSouthwest
Wed 9/36:00 amBZN - STL
2 stops10h 45mSouthwest
Deal found 6/12$253
This Delta deal was found by Cheapflights users on 6/11. 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.
Thu 8/147:11 pmSTL - BZN
1 stop5h 48mDelta
Wed 8/2011:44 amBZN - STL
1 stop5h 32mDelta
Deal found 6/11$257
This Delta deal was found by Cheapflights users on 6/10. 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 8/45:37 pmSTL - FCA
1 stop7h 14mDelta
Wed 8/136:11 pmFCA - STL
1 stop5h 27mDelta
Deal found 6/10$258
This Delta deal was found by Cheapflights users on 6/10. 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.
Fri 7/46:00 amSTL - BTM
2 stops12h 35mDelta
Thu 7/106:10 pmBTM - STL
1 stop5h 28mDelta
Deal found 6/10$274
This American Airlines deal was found by Cheapflights users on 6/11. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/48:01 pmSTL - MSO
1 stop17h 14mAmerican Airlines
Thu 8/76:45 amMSO - STL
1 stop12h 33mAmerican Airlines
Deal found 6/11$297
This United Airlines deal was found by Cheapflights users on 6/10. 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 8/264:40 pmSTL - BZN
1 stop5h 51mUnited Airlines
Wed 9/37:00 amBZN - STL
2 stops7h 44mUnited Airlines
Deal found 6/10$299
This Delta deal was found by Cheapflights users on 6/10. 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.
Thu 7/245:37 pmSTL - BIL
1 stop6h 33mDelta
Sun 8/315:25 amBIL - STL
1 stop7h 04mDelta
Deal found 6/10$313
This United Airlines deal was found by Cheapflights users on 6/10. 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.
Fri 9/2612:25 pmSTL - FCA
2 stops10h 06mUnited Airlines
Tue 9/305:06 pmFCA - STL
1 stop5h 52mUnited Airlines
Deal found 6/10$328
This United Airlines deal was found by Cheapflights users on 6/10. 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 8/268:15 amSTL - BTM
2 stops15h 06mUnited Airlines
Wed 9/39:45 amBTM - STL
2 stops10h 47mUnited Airlines
Deal found 6/10$329
This Hawaiian Airlines deal was found by Cheapflights users on 6/10. 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 Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/43:57 pmSTL - FCA
1 stop9h 01mHawaiian Airlines
Fri 10/106:31 amFCA - STL
1 stop7h 24mHawaiian Airlines
Deal found 6/10$341

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 June 12, 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

Tue 8/19

7:23 am-12:34 pm

1 stop6h 11m

Kalispell Glacier Park

Tue 8/26

3:49 pm-11:14 pm

1 stop6h 25m

$227

St. LouisBozeman

STL - BZN

STLBZN

Lambert-St Louis

Wed 8/27

6:06 am-12:39 pm

1 stop7h 33m

Bozeman Gallatin Field

Wed 9/3

3:04 pm-9:53 pm

1 stop5h 49m

$237

St. LouisBozeman

STL - BZN

STLBZN

Lambert-St Louis

Wed 8/27

6:45 am-4:50 pm

1 stop11h 05m

Bozeman Gallatin Field

Wed 9/3

6:00 am-5:45 pm

2 stops10h 45m

$253

St. LouisBozeman

STL - BZN

STLBZN

Lambert-St Louis

Thu 8/14

7:11 pm-11:59 pm

1 stop5h 48m

Bozeman Gallatin Field

Wed 8/20

11:44 am-6:16 pm

1 stop5h 32m

$257

St. LouisKalispell

STL - FCA

STLFCA

Lambert-St Louis

Mon 8/4

5:37 pm-11:51 pm

1 stop7h 14m

Kalispell Glacier Park

Wed 8/13

6:11 pm-12:38 am

1 stop5h 27m

$258

St. LouisButte

STL - BTM

STLBTM

Lambert-St Louis

Fri 7/4

6:00 am-5:35 pm

2 stops12h 35m

Butte Silver Bow Co

Thu 7/10

6:10 pm-12:38 am

1 stop5h 28m

$274

St. LouisMissoula

STL - MSO

STLMSO

Lambert-St Louis

Mon 8/4

8:01 pm-12:15 pm

1 stop17h 14m

Missoula Johnson-Bell Field

Thu 8/7

6:45 am-8:18 pm

1 stop12h 33m

$297

St. LouisBozeman

STL - BZN

STLBZN

Lambert-St Louis

Tue 8/26

4:40 pm-9:31 pm

1 stop5h 51m

Bozeman Gallatin Field

Wed 9/3

7:00 am-3:44 pm

2 stops7h 44m

$299

St. LouisBillings

STL - BIL

STLBIL

Lambert-St Louis

Thu 7/24

5:37 pm-11:10 pm

1 stop6h 33m

Billings Logan Intl

Sun 8/31

5:25 am-1:29 pm

1 stop7h 04m

$313

St. LouisButte

STL - BTM

STLBTM

Lambert-St Louis

Tue 8/26

8:15 am-10:21 pm

2 stops15h 06m

Butte Silver Bow Co

Wed 9/3

9:45 am-9:32 pm

2 stops10h 47m

$329

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/12

Showing 1-10 of 47 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 $479). 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 June 12, 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.

Rainfall in Montana by month

Plan your trip to Montana by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Montana ranges from 0.4 - 2.0 inches per month. May is typically the wettest month, when rainfall can reach 2.0 in. January is typically the driest time to visit Montana when rainfall is around 0.4 in.

Temperature in Montana by month

Plan your trip to Montana by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Montana, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 64.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 15.8 F).

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 June 12, 2025.
See what other customers who have flown with Alaska Airlines, Southwest and Delta from St. Louis to Montana have to say. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Crew

8.5

Overall

8.0

Comfort

7.8

Boarding

8.1

Food

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Crew

8.5

Overall

8.0

Comfort

7.8

Boarding

8.1

Food

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Southwest
8.0
Very good
4,287 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Crew

8.5

Overall

8.0

Comfort

7.8

Boarding

8.1

Food

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Delta
8.0
Very good
7,950 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Crew

8.5

Overall

8.0

Comfort

7.8

Boarding

8.1

Food

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Hawaiian Airlines
7.9
Good
2,494 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Crew

8.5

Overall

8.0

Comfort

7.8

Boarding

8.1

Food

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
United Airlines
7.4
Good
8,790 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Crew

8.5

Overall

8.0

Comfort

7.8

Boarding

8.1

Food

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

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.

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

    To fly one-way, consider booking your trip with Alaska Airlines, which is currently one of the cheapest options available, starting at $113. American Airlines flights start at $114 while deals on Delta start at $129 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 $479). 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.

See more FAQs

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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 June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$236Average$451FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$244Average$462FlexibilityNo cancel feeOn-time75%
American AirlinesCheapest$268Average$434FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$278Average$566FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$366Average$489FlexibilityNo cancel feeOn-time63%

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