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St. Louis

$110+ 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 2/7. Fares are subject to change and may not be available on all flights or dates of travel.
BZN — STL
Dec 2 — Dec 91
Tue 12/2
Tue 12/9
1 adult, Economy
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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 November 2, 2025.

This Southwest deal was found by Cheapflights users on 10/30. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/85:30 amBZN - STL
1 stop4h 50mSouthwest
Tue 12/95:35 amSTL - BZN
1 stop5h 20mSouthwest
Deal found 10/30$209
This Southwest deal was found by Cheapflights users on 11/1. 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 12/254:05 pmBZN - STL
1 stop5h 15mSouthwest
Fri 1/26:45 pmSTL - BZN
1 stop6h 40mSouthwest
Deal found 11/1$260
This Delta deal was found by Cheapflights users on 10/31. 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.
Sat 11/86:00 amBZN - STL
1 stop4h 34mDelta
Tue 11/116:00 amSTL - BZN
1 stop8h 25mDelta
Deal found 10/31$319
This Delta deal was found by Cheapflights users on 11/2. 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 12/145:14 amBIL - STL
1 stop7h 16mDelta
Thu 12/185:34 pmSTL - BIL
1 stop7h 14mDelta
Deal found 11/2$333
This American Airlines deal was found by Cheapflights users on 11/2. 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 12/282:29 pmBZN - STL
1 stop8h 22mAmerican Airlines
Sat 1/39:36 amSTL - BZN
1 stop6h 18mAmerican Airlines
Deal found 11/2$339
This Delta deal was found by Cheapflights users on 10/31. 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.
Wed 11/56:20 pmBZN - STL
1 stop5h 04mDelta
Mon 11/106:34 amSTL - BZN
1 stop5h 11mDelta
Deal found 10/31$374
This Delta deal was found by Cheapflights users on 11/2. 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 12/105:00 amMSO - STL
1 stop7h 30mDelta
Sun 12/142:38 pmSTL - MSO
2 stops10h 58mDelta
Deal found 11/2$376
This Southwest deal was found by Cheapflights users on 11/1. 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.
Sun 12/283:40 pmBZN - STL
1 stop6h 25mSouthwest
Sat 1/34:20 pmSTL - BZN
2 stops9h 15mSouthwest
Deal found 11/1$386
This Alaska Airlines deal was found by Cheapflights users on 11/1. 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 12/104:22 pmMSO - STL
1 stop21h 05mAlaska Airlines
Sun 12/143:23 pmSTL - MSO
1 stop10h 03mAlaska Airlines
Deal found 11/1$390
This Delta deal was found by Cheapflights users on 11/1. 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 11/216:16 pmMSO - STL
1 stop5h 30mDelta
Wed 11/267:47 pmSTL - MSO
1 stop5h 32mDelta
Deal found 11/1$391
This Delta deal was found by Cheapflights users on 11/2. 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 12/42:36 pmBZN - STL
1 stop8h 06mDelta
Tue 12/166:00 amSTL - BZN
1 stop8h 12mDelta
Deal found 11/2$397
This United Airlines deal was found by Cheapflights users on 10/31. 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.
Sat 11/82:43 pmBZN - STL
1 stop6h 11mUnited Airlines
Tue 11/118:25 amSTL - BZN
2 stops14h 15mUnited Airlines
Deal found 10/31$404

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 November 2, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$208
(Alaska Airlines)

One-way from

$110
(Alaska Airlines)

Popular in

March

Cheapest in

October

Average price

$376
Provider with most accurate pricing for Bozeman Gallatin Field-Lambert-St Louis flight deals.
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Provider most trusted by Cheapflights users for Bozeman Gallatin Field-Lambert-St Louis flights.
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From Montana to Lambert-St Louis
Search Deals
One-way flight from Montana to Lambert-St Louis
Search Deals
Highest demand for flights based on searches. 5% potential increase in price ($24 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($15 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 2025
Search Deals

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 November 2, 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

Mon 1/26

3:03 pm-1:54 pm

1 stop21h 51m

Lambert-St Louis

Sat 2/7

6:19 pm-11:20 am

1 stop18h 01m

$208

BozemanSt. Louis

BZN - STL

BZNSTL

Bozeman Gallatin Field

Tue 12/9

5:30 am-1:20 pm

1 stop6h 50m

Lambert-St Louis

Tue 12/9

4:30 pm-10:45 pm

1 stop7h 15m

$209

BozemanSt. Louis

BZN - STL

BZNSTL

Bozeman Gallatin Field

Thu 1/8

1:42 pm-9:15 pm

1 stop6h 33m

Lambert-St Louis

Mon 1/12

6:00 am-12:50 pm

1 stop7h 50m

$211

BozemanSt. Louis

BZN - STL

BZNSTL

Bozeman Gallatin Field

Tue 4/7

2:00 pm-11:40 pm

1 stop8h 40m

Lambert-St Louis

Wed 4/8

6:30 am-12:37 pm

1 stop7h 07m

$257

KalispellSt. Louis

FCA - STL

FCASTL

Kalispell Glacier Park

Wed 4/15

6:12 pm-12:36 am

1 stop5h 24m

Lambert-St Louis

Sat 4/18

6:30 am-1:45 pm

1 stop8h 15m

$257

BozemanSt. Louis

BZN - STL

BZNSTL

Bozeman Gallatin Field

Mon 12/8

12:40 pm-9:00 pm

1 stop7h 20m

Lambert-St Louis

Tue 12/9

2:25 pm-10:45 pm

2 stops9h 20m

$265

BozemanSt. Louis

BZN - STL

BZNSTL

Bozeman Gallatin Field

Tue 4/21

2:00 pm-11:38 pm

1 stop8h 38m

Lambert-St Louis

Fri 4/24

7:20 am-1:10 pm

1 stop6h 50m

$288

BozemanSt. Louis

BZN - STL

BZNSTL

Bozeman Gallatin Field

Thu 1/8

11:15 am-7:05 pm

1 stop6h 50m

Lambert-St Louis

Mon 1/12

2:15 pm-10:15 pm

2 stops9h 00m

$295

BillingsSt. Louis

BIL - STL

BILSTL

Billings Logan Intl

Fri 1/9

2:45 pm-8:58 pm

1 stop5h 13m

Lambert-St Louis

Mon 1/19

2:45 pm-9:23 pm

1 stop7h 38m

$333

BillingsSt. Louis

BIL - STL

BILSTL

Billings Logan Intl

Tue 4/7

5:40 am-1:25 pm

1 stop6h 45m

Lambert-St Louis

Wed 4/8

3:50 pm-10:50 pm

1 stop8h 00m

$333

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/1

Showing 1-10 of 28 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, March is the cheapest month in which you can book a flight from Montana to St. Louis (average of $180). Flying from Montana to St. Louis in February is currently the most expensive (average of $351). 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.

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.

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

    A quick flight from Montana to St. Louis can take about 6h 33m. Alaska Airlines provides one of the quickest options available for as low as $211. Montana and St. Louis are separated by a distance of 1163 mi. This flight may include one or multiple stops.

  • 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 Alaska Airlines ($110), Delta ($129), and Southwest ($260).

  • 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, March is the cheapest month in which you can book a flight from Montana to St. Louis (average of $180). Flying from Montana to St. Louis in February is currently the most expensive (average of $351). 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
Edwardsville
O'Fallon
Fairview Heights
Maryland Heights
Collinsville
Eureka
Glencoe
St. Peters
Chesterfield
Alton
Farmington
Festus

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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 3 airlines flying from Montana to St. Louis

Discover the top 3 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 November 2, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$205Average$433FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$249Average$498FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$310Average$484FlexibilityNo cancel feeOn-time63%

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