HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Montana

$145+ 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 8/5. Fares are subject to change and may not be available on all flights or dates of travel.
STL — BZN
May 6 — May 131
Tue 5/6
Tue 5/13
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from St. Louis to Montana with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 May 1, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$271
(Delta)

One-way from

$145
(American Airlines)

Popular in

December

Cheapest in

November

Average price

$468
Provider with most accurate pricing for Lambert-St Louis-Bozeman Gallatin Field flight deals.
Search Deals
Provider most trusted by Cheapflights users for Lambert-St Louis-Bozeman Gallatin Field flights.
Search Deals
From Lambert-St Louis to Montana
Search Deals
One-way flight from Lambert-St Louis to Montana
Search Deals
Highest demand for flights based on searches. 0% potential increase in price ($2 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($16 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in May 2025
Search Deals

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 May 1, 2025.

This Delta deal was found by Cheapflights users on 4/30. 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 6/26:05 pmSTL - MSO
1 stop6h 42mDelta
Mon 6/96:24 pmMSO - STL
1 stop5h 19mDelta
Deal found 4/30$271
This Delta deal was found by Cheapflights users on 4/30. 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 6/256:40 amSTL - BTM
2 stops11h 26mDelta
Tue 7/86:10 pmBTM - STL
1 stop5h 28mDelta
Deal found 4/30$274
This Delta deal was found by Cheapflights users on 4/30. 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 6/247:15 pmSTL - BZN
1 stop5h 46mDelta
Thu 7/102:15 pmBZN - STL
1 stop8h 38mDelta
Deal found 4/30$286
This Southwest deal was found by Cheapflights users on 4/28. 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.
Thu 5/296:55 pmSTL - BZN
1 stop5h 30mSouthwest
Tue 6/31:15 pmBZN - STL
1 stop7h 35mSouthwest
Deal found 4/28$302
This Delta deal was found by Cheapflights users on 4/30. 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 6/117:15 pmSTL - FCA
1 stop6h 09mDelta
Tue 6/175:30 amFCA - STL
1 stop7h 00mDelta
Deal found 4/30$305
This American Airlines deal was found by Cheapflights users on 4/29. 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.
Thu 6/125:37 amSTL - FCA
1 stop6h 17mAmerican Airlines
Tue 6/1711:44 amFCA - STL
1 stop8h 10mAmerican Airlines
Deal found 4/29$312
This United Airlines deal was found by Cheapflights users on 4/30. 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.
Wed 5/285:20 amSTL - BIL
1 stop5h 17mUnited Airlines
Wed 6/45:54 pmBIL - STL
1 stop5h 05mUnited Airlines
Deal found 4/30$313
This American Airlines deal was found by Cheapflights users on 4/29. 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.
Sun 6/225:30 amSTL - BZN
1 stop7h 13mAmerican Airlines
Sat 6/282:57 pmBZN - STL
1 stop7h 57mAmerican Airlines
Deal found 4/29$313
This American Airlines deal was found by Cheapflights users on 4/30. 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 8/46:00 amSTL - MSO
1 stop7h 23mAmerican Airlines
Thu 8/71:51 pmMSO - STL
1 stop8h 12mAmerican Airlines
Deal found 4/30$314
This Delta deal was found by Cheapflights users on 4/30. 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 5/245:00 pmSTL - GTF
1 stop6h 31mDelta
Sat 5/315:45 amGTF - STL
1 stop6h 49mDelta
Deal found 4/30$326
This United Airlines deal was found by Cheapflights users on 4/30. 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 6/244:32 pmSTL - BTM
1 stop6h 58mUnited Airlines
Thu 7/1010:25 amBTM - STL
1 stop5h 06mUnited Airlines
Deal found 4/30$344
This Delta deal was found by Cheapflights users on 4/29. 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 7/110:48 amSTL - BIL
2 stops13h 23mDelta
Tue 7/86:26 pmBIL - STL
1 stop5h 12mDelta
Deal found 4/29$351

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 May 1, 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. LouisMissoula

STL - MSO

STLMSO

Lambert-St Louis

Mon 6/2

6:05 pm-11:47 pm

1 stop6h 42m

Missoula Johnson-Bell Field

Mon 6/9

6:24 pm-12:43 am

1 stop5h 19m

$271

St. LouisButte

STL - BTM

STLBTM

Lambert-St Louis

Wed 6/25

6:40 am-5:06 pm

2 stops11h 26m

Butte Silver Bow Co

Tue 7/8

6:10 pm-12:38 am

1 stop5h 28m

$274

St. LouisBozeman

STL - BZN

STLBZN

Lambert-St Louis

Tue 6/24

7:15 pm-12:01 am

1 stop5h 46m

Bozeman Gallatin Field

Thu 7/10

2:15 pm-11:53 pm

1 stop8h 38m

$286

St. LouisBozeman

STL - BZN

STLBZN

Lambert-St Louis

Thu 5/29

6:55 pm-11:25 pm

1 stop5h 30m

Bozeman Gallatin Field

Tue 6/3

1:15 pm-9:50 pm

1 stop7h 35m

$302

St. LouisKalispell

STL - FCA

STLFCA

Lambert-St Louis

Wed 6/11

7:15 pm-12:24 am

1 stop6h 09m

Kalispell Glacier Park

Tue 6/17

5:30 am-1:30 pm

1 stop7h 00m

$305

St. LouisKalispell

STL - FCA

STLFCA

Lambert-St Louis

Thu 6/12

5:37 am-10:54 am

1 stop6h 17m

Kalispell Glacier Park

Tue 6/17

11:44 am-8:54 pm

1 stop8h 10m

$312

St. LouisBillings

STL - BIL

STLBIL

Lambert-St Louis

Wed 5/28

5:20 am-9:37 am

1 stop5h 17m

Billings Logan Intl

Wed 6/4

5:54 pm-11:59 pm

1 stop5h 05m

$313

St. LouisBozeman

STL - BZN

STLBZN

Lambert-St Louis

Sun 6/22

5:30 am-11:43 am

1 stop7h 13m

Bozeman Gallatin Field

Sat 6/28

2:57 pm-11:54 pm

1 stop7h 57m

$313

St. LouisGreat Falls

STL - GTF

STLGTF

Lambert-St Louis

Sat 5/24

5:00 pm-10:31 pm

1 stop6h 31m

Great Falls

Sat 5/31

5:45 am-1:34 pm

1 stop6h 49m

$326

St. LouisButte

STL - BTM

STLBTM

Lambert-St Louis

Tue 6/24

4:32 pm-10:30 pm

1 stop6h 58m

Butte Silver Bow Co

Thu 7/10

10:25 am-4:31 pm

1 stop5h 06m

$344

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/30

Showing 1-10 of 39 results
1
2
3
4

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 June is currently the most expensive (average of $510). 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 May 1, 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 May 1, 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
9,972 reviews

Comfort

7.9

Entertainment

7.1

Boarding

8.1

Overall

8.0

Food

7.1

Crew

8.5

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
9,972 reviews
Alaska Airlines
8.0
Very good
9,972 reviews

Comfort

7.9

Entertainment

7.1

Boarding

8.1

Overall

8.0

Food

7.1

Crew

8.5

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
4,294 reviews
Alaska Airlines
8.0
Very good
9,972 reviews

Comfort

7.9

Entertainment

7.1

Boarding

8.1

Overall

8.0

Food

7.1

Crew

8.5

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
7,934 reviews
Alaska Airlines
8.0
Very good
9,972 reviews

Comfort

7.9

Entertainment

7.1

Boarding

8.1

Overall

8.0

Food

7.1

Crew

8.5

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
2,408 reviews
Alaska Airlines
8.0
Very good
9,972 reviews

Comfort

7.9

Entertainment

7.1

Boarding

8.1

Overall

8.0

Food

7.1

Crew

8.5

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
8,696 reviews
Alaska Airlines
8.0
Very good
9,972 reviews

Comfort

7.9

Entertainment

7.1

Boarding

8.1

Overall

8.0

Food

7.1

Crew

8.5

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 American Airlines, which is currently one of the cheapest options available, starting at $145. Delta flights start at $150 while deals on United Airlines start at $216 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 - Bozeman Gallatin Field, Lambert-St Louis - Missoula Johnson-Bell Field and Lambert-St Louis - Kalispell Glacier Park.

  • 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 June is currently the most expensive (average of $510). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for St. Louis to Montana

See prices for flight routes from nearby airports that may be better suited for you.
St. Louis to Seattle flights
Kansas City to Seattle flights
St. Louis to Las Vegas flights
Kansas City to Las Vegas flights
St. Louis to Denver flights
Kansas City to Denver flights
Kansas City to Newark flights
St. Louis to Newark flights
St. Louis to Dallas/Fort Worth flights
Kansas City to John F Kennedy Intl flights
St. Louis to Orlando flights
Kansas City to O'Hare Intl flights
St. Louis to Miami flights
St. Louis to John F Kennedy Intl flights
St. Louis to LaGuardia flights
Kansas City to Orlando flights
St. Louis to Dulles Intl flights
Kansas City to Miami flights
Kansas City to Boston flights
Kansas City to LaGuardia flights
St. Louis to O'Hare Intl flights
Kansas City to Portland flights
Kansas City to Dallas/Fort Worth flights
Kansas City to San Francisco flights
St. Louis to Boston flights
Kansas City to Hobby flights
Kansas City to Sky Harbor Intl flights
St. Louis to Los Angeles flights
St. Louis to Hobby flights
Kansas City to Fort Lauderdale flights
Kansas City to Atlanta flights
Kansas City to George Bush Intcntl flights
Kansas City to Los Angeles flights
St. Louis to Philadelphia flights
Kansas City to Tampa flights
St. Louis to Sky Harbor Intl flights
St. Louis to Portland flights
St. Louis to Baltimore flights
St. Louis to San Diego flights
St. Louis to Salt Lake City flights
St. Louis to George Bush Intcntl flights
Kansas City to San Diego flights
Kansas City to Reagan-National flights
Kansas City to Dulles Intl flights
St. Louis to Honolulu flights
St. Louis to Tampa flights
St. Louis to San Francisco flights
St. Louis to Reagan-National flights
Kansas City to Philadelphia flights
Kansas City to Midway flights

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 May 1, 2025.
AirlineCheapestAverageFlexibilityOn-time
Alaska AirlinesCheapest$233Average$460FlexibilityNo cancel feeOn-time75%
DeltaCheapest$236Average$449FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$268Average$466FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$278Average$583FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$359Average$494FlexibilityNo cancel feeOn-time63%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.
Site
©2025 Cheapflights