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St. Louis

$144+ 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 9/9. Fares are subject to change and may not be available on all flights or dates of travel.
BZN — STL
Aug 5 — Aug 121
Tue 8/5
Tue 8/12
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 July 31, 2025.

Round-trip from

$215
(American Airlines)

One-way from

$144
(American Airlines)

Popular in

March

Cheapest in

September

Average price

$579
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. 5% potential increase in price ($23 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 July 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 July 31, 2025.

This American Airlines deal was found by Cheapflights users on 7/30. 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.
Fri 10/241:50 pmBZN - STL
1 stop8h 28mAmerican Airlines
Mon 10/276:00 amSTL - BZN
1 stop7h 53mAmerican Airlines
Deal found 7/30$215
This Alaska Airlines deal was found by Cheapflights users on 7/30. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/53:02 pmBZN - STL
1 stop23h 16mAlaska Airlines
Mon 11/107:00 amSTL - BZN
1 stop8h 08mAlaska Airlines
Deal found 7/30$239
This Delta deal was found by Cheapflights users on 7/30. 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 8/276:50 amFCA - STL
1 stop6h 40mDelta
Wed 9/35:30 pmSTL - FCA
1 stop7h 23mDelta
Deal found 7/30$281
This Delta deal was found by Cheapflights users on 7/31. 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 9/256:20 pmBZN - STL
1 stop5h 18mDelta
Sat 10/46:00 amSTL - BZN
2 stops11h 45mDelta
Deal found 7/31$299
This American Airlines deal was found by Cheapflights users on 7/31. 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 8/251:51 pmMSO - STL
1 stop8h 23mAmerican Airlines
Wed 8/277:01 amSTL - MSO
1 stop7h 00mAmerican Airlines
Deal found 7/31$343
This Delta deal was found by Cheapflights users on 7/30. 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 12/38:00 amMSO - STL
2 stops7h 51mDelta
Sun 12/76:59 pmSTL - MSO
1 stop6h 33mDelta
Deal found 7/30$348
This United Airlines deal was found by Cheapflights users on 7/30. 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.
Thu 8/215:45 pmBZN - STL
1 stop5h 08mUnited Airlines
Sun 8/245:15 amSTL - BZN
2 stops10h 17mUnited Airlines
Deal found 7/30$372
This Delta deal was found by Cheapflights users on 7/30. 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.
Sun 9/145:25 amBIL - STL
1 stop7h 08mDelta
Wed 9/175:32 pmSTL - BIL
1 stop6h 38mDelta
Deal found 7/30$376
This Alaska Airlines deal was found by Cheapflights users on 7/31. 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.
Mon 8/256:40 pmMSO - STL
1 stop18h 59mAlaska Airlines
Wed 8/276:00 amSTL - MSO
2 stops18h 59mAlaska Airlines
Deal found 7/31$382
This Alaska Airlines deal was found by Cheapflights users on 7/30. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/47:18 pmBIL - STL
1 stop18h 21mAlaska Airlines
Thu 9/113:35 pmSTL - BIL
1 stop9h 36mAlaska Airlines
Deal found 7/30$382
This American Airlines deal was found by Cheapflights users on 7/31. 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 9/41:59 pmBIL - STL
1 stop7h 51mAmerican Airlines
Thu 9/116:05 amSTL - BIL
1 stop6h 44mAmerican Airlines
Deal found 7/31$387
This United Airlines deal was found by Cheapflights users on 7/31. 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.
Thu 9/47:00 amBIL - STL
2 stops10h 23mUnited Airlines
Thu 9/114:40 pmSTL - BIL
1 stop4h 54mUnited Airlines
Deal found 7/31$398

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 July 31, 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

Fri 10/24

1:50 pm-11:18 pm

1 stop8h 28m

Lambert-St Louis

Mon 10/27

6:00 am-12:53 pm

1 stop7h 53m

$215

BozemanSt. Louis

BZN - STL

BZNSTL

Bozeman Gallatin Field

Wed 11/5

3:02 pm-3:18 pm

1 stop23h 16m

Lambert-St Louis

Mon 11/10

7:00 am-2:08 pm

1 stop8h 08m

$239

KalispellSt. Louis

FCA - STL

FCASTL

Kalispell Glacier Park

Wed 8/27

6:50 am-2:30 pm

1 stop6h 40m

Lambert-St Louis

Wed 9/3

5:30 pm-11:53 pm

1 stop7h 23m

$281

BozemanSt. Louis

BZN - STL

BZNSTL

Bozeman Gallatin Field

Thu 9/25

6:20 pm-12:38 am

1 stop5h 18m

Lambert-St Louis

Sat 10/4

6:00 am-4:45 pm

2 stops11h 45m

$299

MissoulaSt. Louis

MSO - STL

MSOSTL

Missoula Johnson-Bell Field

Mon 8/25

1:51 pm-11:14 pm

1 stop8h 23m

Lambert-St Louis

Wed 8/27

7:01 am-1:01 pm

1 stop7h 00m

$343

MissoulaSt. Louis

MSO - STL

MSOSTL

Missoula Johnson-Bell Field

Wed 12/3

8:00 am-4:51 pm

2 stops7h 51m

Lambert-St Louis

Sun 12/7

6:59 pm-12:32 am

1 stop6h 33m

$348

BozemanSt. Louis

BZN - STL

BZNSTL

Bozeman Gallatin Field

Thu 8/21

5:45 pm-11:53 pm

1 stop5h 08m

Lambert-St Louis

Sun 8/24

5:15 am-2:32 pm

2 stops10h 17m

$372

BillingsSt. Louis

BIL - STL

BILSTL

Billings Logan Intl

Sun 9/14

5:25 am-1:33 pm

1 stop7h 08m

Lambert-St Louis

Wed 9/17

5:32 pm-11:10 pm

1 stop6h 38m

$376

MissoulaSt. Louis

MSO - STL

MSOSTL

Missoula Johnson-Bell Field

Mon 8/25

6:40 pm-2:39 pm

1 stop18h 59m

Lambert-St Louis

Wed 8/27

6:00 am-11:59 pm

2 stops18h 59m

$382

BillingsSt. Louis

BIL - STL

BILSTL

Billings Logan Intl

Thu 9/4

7:18 pm-2:39 pm

1 stop18h 21m

Lambert-St Louis

Thu 9/11

3:35 pm-12:11 am

1 stop9h 36m

$382

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/30

Showing 1-10 of 32 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.

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 July 31, 2025.
Read through reviews of airlines operating flights from Montana to St. Louis, such as Alaska Airlines, Southwest, and Delta. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Boarding

8.1

Entertainment

7.1

Overall

8.0

Food

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Boarding

8.1

Entertainment

7.1

Overall

8.0

Food

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Southwest
8.0
Very good
4,246 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Boarding

8.1

Entertainment

7.1

Overall

8.0

Food

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Delta
8.0
Very good
7,981 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Boarding

8.1

Entertainment

7.1

Overall

8.0

Food

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Hawaiian Airlines
7.8
Good
2,611 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Boarding

8.1

Entertainment

7.1

Overall

8.0

Food

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
United Airlines
7.4
Good
8,900 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Boarding

8.1

Entertainment

7.1

Overall

8.0

Food

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.

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 ($144), Delta ($157), and Alaska Airlines ($178).

  • 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 St. Louis?

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

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Alternative routes for Montana to St. Louis

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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 July 31, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$212Average$416FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$268Average$551FlexibilityNo cancel feeOn-time69%
Alaska AirlinesCheapest$280Average$520FlexibilityNo cancel feeOn-time75%
SouthwestCheapest$318Average$436FlexibilityNo cancel feeOn-time63%

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