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St. Louis

$114+ Cheap flights from Montana to St. Louis (STL)

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 7/10. Fares are subject to change and may not be available on all flights or dates of travel.
BZN — STL
Jun 21 — Jun 281
Sat 6/21
Sat 6/28
1 adult, Economy
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Cheap flight deals from Montana to St. Louis

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

Round-trip from

$214
(Alaska Airlines)

One-way from

$114
(American Airlines)

Popular in

July

Cheapest in

February

Average price

$445
From Montana to Lambert-St Louis
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One-way flight from Montana to Lambert-St Louis
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Highest demand for flights based on searches. 10% potential increase in price ($55 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($13 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 Montana to St. Louis

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

This Alaska Airlines deal was found by Cheapflights users on 6/16. 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.
Wed 11/52:56 pmBZN - STL
1 stop23h 09mAlaska Airlines
Mon 11/107:00 amSTL - BZN
1 stop8h 02mAlaska Airlines
Deal found 6/16$214
This Delta deal was found by Cheapflights users on 6/15. 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 8/276:10 pmBTM - STL
1 stop5h 28mDelta
Sun 8/318:46 amSTL - BTM
2 stops9h 20mDelta
Deal found 6/15$284
This American Airlines deal was found by Cheapflights users on 6/15. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/46:00 amBIL - STL
1 stop12h 13mAmerican Airlines
Thu 9/119:56 amSTL - BIL
1 stop13h 43mAmerican Airlines
Deal found 6/15$309
This Delta deal was found by Cheapflights users on 6/15. 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.
Thu 8/76:11 pmFCA - STL
1 stop5h 27mDelta
Sun 8/107:15 pmSTL - FCA
1 stop6h 10mDelta
Deal found 6/15$318
This American Airlines deal was found by Cheapflights users on 6/15. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/154:53 pmFCA - STL
1 stop5h 58mAmerican Airlines
Tue 7/227:23 amSTL - FCA
1 stop6h 12mAmerican Airlines
Deal found 6/15$319
This Southwest deal was found by Cheapflights users on 6/15. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/126:45 amBZN - STL
1 stop10h 35mSouthwest
Sun 7/136:35 amSTL - BZN
1 stop12h 45mSouthwest
Deal found 6/15$324
This American Airlines deal was found by Cheapflights users on 6/14. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/231:49 pmBZN - STL
1 stop7h 13mAmerican Airlines
Tue 12/305:56 amSTL - BZN
1 stop5h 42mAmerican Airlines
Deal found 6/14$337
This American Airlines deal was found by Cheapflights users on 6/15. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/171:47 pmMSO - STL
1 stop8h 10mAmerican Airlines
Tue 7/224:52 pmSTL - MSO
1 stop7h 37mAmerican Airlines
Deal found 6/15$351
This United Airlines deal was found by Cheapflights users on 6/15. 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 10/145:10 pmMSO - STL
1 stop5h 48mUnited Airlines
Fri 10/179:00 amSTL - MSO
1 stop5h 27mUnited Airlines
Deal found 6/15$377
This Mytrip deal was found by Cheapflights users on 6/16. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/2410:40 amFCA - STL
3 stops22h 12mMultiple Airlines
Mon 7/2810:47 amSTL - FCA
2 stops26h 38mMultiple Airlines
Deal found 6/16$415
This United Airlines deal was found by Cheapflights users on 6/15. 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.
Wed 8/279:45 amBTM - STL
1 stop5h 48mUnited Airlines
Sun 8/315:15 amSTL - BTM
1 stop18h 06mUnited Airlines
Deal found 6/15$417
This United Airlines deal was found by Cheapflights users on 6/14. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/54:35 pmBZN - STL
2 stops21h 54mUnited Airlines
Mon 11/106:43 pmSTL - BZN
2 stops19h 52mUnited Airlines
Deal found 6/14$428

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

Fly from

Montana

Fly to

St. Louis

Route

Depart

Return

Price

BozemanSt. Louis

BZN - STL

BZNSTL

Bozeman Gallatin Field

Wed 11/5

2:56 pm-3:05 pm

1 stop23h 09m

Lambert-St Louis

Mon 11/10

7:00 am-2:02 pm

1 stop8h 02m

$214

ButteSt. Louis

BTM - STL

BTMSTL

Butte Silver Bow Co

Wed 8/27

6:10 pm-12:38 am

1 stop5h 28m

Lambert-St Louis

Sun 8/31

8:46 am-5:06 pm

2 stops9h 20m

$284

BillingsSt. Louis

BIL - STL

BILSTL

Billings Logan Intl

Thu 9/4

6:00 am-7:13 pm

1 stop12h 13m

Lambert-St Louis

Thu 9/11

9:56 am-10:39 pm

1 stop13h 43m

$309

KalispellSt. Louis

FCA - STL

FCASTL

Kalispell Glacier Park

Thu 8/7

6:11 pm-12:38 am

1 stop5h 27m

Lambert-St Louis

Sun 8/10

7:15 pm-12:25 am

1 stop6h 10m

$318

KalispellSt. Louis

FCA - STL

FCASTL

Kalispell Glacier Park

Tue 7/15

4:53 pm-11:51 pm

1 stop5h 58m

Lambert-St Louis

Tue 7/22

7:23 am-12:35 pm

1 stop6h 12m

$319

BozemanSt. Louis

BZN - STL

BZNSTL

Bozeman Gallatin Field

Sat 7/12

6:45 am-6:20 pm

1 stop10h 35m

Lambert-St Louis

Sun 7/13

6:35 am-6:20 pm

1 stop12h 45m

$324

MissoulaSt. Louis

MSO - STL

MSOSTL

Missoula Johnson-Bell Field

Thu 7/17

1:47 pm-10:57 pm

1 stop8h 10m

Lambert-St Louis

Tue 7/22

4:52 pm-11:29 pm

1 stop7h 37m

$351

MissoulaSt. Louis

MSO - STL

MSOSTL

Missoula Johnson-Bell Field

Tue 10/14

5:10 pm-11:58 pm

1 stop5h 48m

Lambert-St Louis

Fri 10/17

9:00 am-1:27 pm

1 stop5h 27m

$377

KalispellSt. Louis

FCA - STL

FCASTL

Kalispell Glacier Park

Thu 7/24

10:40 am-9:52 am

3 stops22h 12m

Lambert-St Louis

Mon 7/28

10:47 am-12:25 pm

2 stops26h 38m

$415

ButteSt. Louis

BTM - STL

BTMSTL

Butte Silver Bow Co

Wed 8/27

9:45 am-4:33 pm

1 stop5h 48m

Lambert-St Louis

Sun 8/31

5:15 am-10:21 pm

1 stop18h 06m

$417

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/13

Showing 1-10 of 42 results
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Best time to book a flight from Montana to St. Louis

Have a flexible travel schedule? Discover the best time to fly to St. Louis from Montana 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 Montana to St. Louis

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

Currently, August is the cheapest month in which you can book a flight from Montana to St. Louis (average of $311). Flying from Montana to St. Louis in March is currently the most expensive (average of $356). 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 MT to STL?

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

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Montana to St. Louis as you normally would.

Rainfall in St. Louis by month

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

In terms of precipitation, rainfall in St. Louis ranges from 2.2 - 4.7 inches per month. May is typically the wettest month, when rainfall can reach 4.7 in. February is typically the driest time to visit St. Louis when rainfall is around 2.2 in.

Temperature in St. Louis by month

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

If weather is an important factor for your trip to St. Louis, 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 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 32.0 F).

Reviews of airlines servicing St. Louis

Get insights into the airlines that provide service to St. Louis. 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 St. Louis. Reviews last updated June 16, 2025.
Peruse reviews from past customers who have flown with Alaska Airlines, Southwest and Delta from Montana to St. Louis to help guide your decision. 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

Crew

8.5

Entertainment

7.1

Comfort

7.8

Food

7.1

Overall

8.0

Boarding

8.1

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

Crew

8.5

Entertainment

7.1

Comfort

7.8

Food

7.1

Overall

8.0

Boarding

8.1

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
4,278 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Entertainment

7.1

Comfort

7.8

Food

7.1

Overall

8.0

Boarding

8.1

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
7,963 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Entertainment

7.1

Comfort

7.8

Food

7.1

Overall

8.0

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Hawaiian Airlines
7.8
Good
2,501 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Entertainment

7.1

Comfort

7.8

Food

7.1

Overall

8.0

Boarding

8.1

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
8,801 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Entertainment

7.1

Comfort

7.8

Food

7.1

Overall

8.0

Boarding

8.1

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 Montana to St. Louis. 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 into for flights to St. Louis from Montana?

    Most people fly into Lambert-St Louis (STL) if they book a flight to St. Louis from 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 Montana to St. Louis one-way?

    The cheapest airlines for a one-way flight from Montana to St. Louis are American Airlines ($114), Alaska Airlines ($149), and Southwest ($154).

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

    The most popular route from Montana to St. Louis is Bozeman Gallatin Field - Lambert-St Louis. You may also consider Missoula Johnson-Bell Field - Lambert-St Louis or Billings Logan Intl - Lambert-St Louis.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Montana to St. Louis 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 Montana to St. Louis?

    Currently, August is the cheapest month in which you can book a flight from Montana to St. Louis (average of $311). Flying from Montana to St. Louis in March is currently the most expensive (average of $356). 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

Traveling to a place near Montana?

Book flights to Montana if you plan to visit one of these locations
O'Fallon
Maryland Heights
Fairview Heights
Collinsville
Eureka
St. Peters
Glencoe
Festus
Alton
Farmington

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Alternative routes for Montana to St. Louis

See prices for flight routes from nearby airports that may be better suited for you.
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Top 4 airlines flying from Montana to St. Louis

Discover the top 4 airlines that operate flights from Montana to St. Louis. 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 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$212Average$402FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$258Average$523FlexibilityNo cancel feeOn-time69%
Alaska AirlinesCheapest$280Average$520FlexibilityNo cancel feeOn-time75%
SouthwestCheapest$318Average$437FlexibilityNo cancel feeOn-time63%

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