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St. Louis

$143+ 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 7/29. Fares are subject to change and may not be available on all flights or dates of travel.
BZN — STL
May 6 — May 131
Tue 5/6
Tue 5/13
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 May 1, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$271
(Delta)

One-way from

$143
(American Airlines)

Popular in

June

Cheapest in

February

Average price

$474
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
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One-way flight from Montana to Lambert-St Louis
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Highest demand for flights based on searches. 15% potential increase in price ($86 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($19 potential savings vs. average RT price).
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Average for round-trip flights in May 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 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.
Thu 6/56:20 pmMSO - STL
1 stop5h 39mDelta
Sun 6/85:45 pmSTL - MSO
1 stop7h 01mDelta
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 11/52:00 pmBZN - STL
1 stop8h 39mDelta
Mon 11/105:30 pmSTL - BZN
1 stop7h 28mDelta
Deal found 4/30$286
This American Airlines deal was found by Cheapflights users on 5/1. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/412:35 pmBIL - STL
1 stop6h 48mAmerican Airlines
Thu 9/117:23 amSTL - BIL
1 stop5h 37mAmerican Airlines
Deal found 5/1$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.
Sat 5/311:22 pmMSO - STL
1 stop8h 23mAmerican Airlines
Sat 6/75:37 amSTL - MSO
1 stop8h 27mAmerican Airlines
Deal found 4/30$316
This American Airlines deal was found by Cheapflights users on 5/1. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/64:52 pmFCA - STL
1 stop6h 02mAmerican Airlines
Mon 6/96:00 amSTL - FCA
1 stop7h 30mAmerican Airlines
Deal found 5/1$319
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.
Fri 6/62:15 pmFCA - STL
1 stop8h 11mDelta
Mon 6/95:38 pmSTL - FCA
2 stops7h 46mDelta
Deal found 4/30$324
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.
Tue 12/231:49 pmBZN - STL
1 stop7h 13mAmerican Airlines
Tue 12/305:56 amSTL - BZN
1 stop5h 42mAmerican Airlines
Deal found 4/30$363
This United Airlines deal was found by Cheapflights users on 5/1. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/117:30 amBZN - STL
1 stop6h 07mUnited Airlines
Tue 7/155:31 pmSTL - BZN
1 stop5h 52mUnited Airlines
Deal found 5/1$366
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.
Thu 9/45:45 amBIL - STL
1 stop6h 39mDelta
Thu 9/112:18 pmSTL - BIL
2 stops9h 14mDelta
Deal found 4/30$381
This Alaska 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/292:45 pmBZN - STL
2 stops18h 09mAlaska Airlines
Tue 6/36:52 amSTL - BZN
2 stops18h 29mAlaska Airlines
Deal found 4/30$396
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.
Fri 5/234:16 pmBIL - STL
1 stop6h 43mUnited Airlines
Mon 5/266:30 amSTL - BIL
2 stops7h 47mUnited Airlines
Deal found 4/30$417
This United Airlines deal was found by Cheapflights users on 5/1. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/1110:25 amBTM - STL
1 stop5h 06mUnited Airlines
Tue 7/154:45 pmSTL - BTM
1 stop6h 47mUnited Airlines
Deal found 5/1$459

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 May 1, 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

MissoulaSt. Louis

MSO - STL

MSOSTL

Missoula Johnson-Bell Field

Thu 6/5

6:20 pm-12:59 am

1 stop5h 39m

Lambert-St Louis

Sun 6/8

5:45 pm-11:46 pm

1 stop7h 01m

$271

BozemanSt. Louis

BZN - STL

BZNSTL

Bozeman Gallatin Field

Thu 5/29

6:10 am-3:00 pm

1 stop7h 50m

Lambert-St Louis

Tue 6/3

7:19 pm-12:04 am

1 stop5h 45m

$286

BillingsSt. Louis

BIL - STL

BILSTL

Billings Logan Intl

Thu 9/4

12:35 pm-8:23 pm

1 stop6h 48m

Lambert-St Louis

Thu 9/11

7:23 am-12:00 pm

1 stop5h 37m

$313

MissoulaSt. Louis

MSO - STL

MSOSTL

Missoula Johnson-Bell Field

Sat 5/31

1:22 pm-10:45 pm

1 stop8h 23m

Lambert-St Louis

Sat 6/7

5:37 am-1:04 pm

1 stop8h 27m

$316

KalispellSt. Louis

FCA - STL

FCASTL

Kalispell Glacier Park

Fri 6/6

4:52 pm-11:54 pm

1 stop6h 02m

Lambert-St Louis

Mon 6/9

6:00 am-12:30 pm

1 stop7h 30m

$319

KalispellSt. Louis

FCA - STL

FCASTL

Kalispell Glacier Park

Fri 6/6

2:15 pm-11:26 pm

1 stop8h 11m

Lambert-St Louis

Mon 6/9

5:38 pm-12:24 am

2 stops7h 46m

$324

BozemanSt. Louis

BZN - STL

BZNSTL

Bozeman Gallatin Field

Fri 7/11

7:30 am-2:37 pm

1 stop6h 07m

Lambert-St Louis

Tue 7/15

5:31 pm-10:23 pm

1 stop5h 52m

$366

BillingsSt. Louis

BIL - STL

BILSTL

Billings Logan Intl

Thu 9/4

5:45 am-1:24 pm

1 stop6h 39m

Lambert-St Louis

Thu 9/11

2:18 pm-10:32 pm

2 stops9h 14m

$381

BozemanSt. Louis

BZN - STL

BZNSTL

Bozeman Gallatin Field

Thu 5/29

2:45 pm-9:54 am

2 stops18h 09m

Lambert-St Louis

Tue 6/3

6:52 am-12:21 am

2 stops18h 29m

$396

BillingsSt. Louis

BIL - STL

BILSTL

Billings Logan Intl

Fri 5/23

4:16 pm-11:59 pm

1 stop6h 43m

Lambert-St Louis

Mon 5/26

6:30 am-1:17 pm

2 stops7h 47m

$417

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/30

Showing 1-10 of 31 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 May 1, 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 May 1, 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
9,972 reviews

Crew

8.5

Overall

8.0

Food

7.1

Boarding

8.1

Entertainment

7.1

Comfort

7.9

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

Crew

8.5

Overall

8.0

Food

7.1

Boarding

8.1

Entertainment

7.1

Comfort

7.9

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
4,293 reviews
Alaska Airlines
8.0
Very good
9,972 reviews

Crew

8.5

Overall

8.0

Food

7.1

Boarding

8.1

Entertainment

7.1

Comfort

7.9

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

Crew

8.5

Overall

8.0

Food

7.1

Boarding

8.1

Entertainment

7.1

Comfort

7.9

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

Crew

8.5

Overall

8.0

Food

7.1

Boarding

8.1

Entertainment

7.1

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
9,972 reviews

Crew

8.5

Overall

8.0

Food

7.1

Boarding

8.1

Entertainment

7.1

Comfort

7.9

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 ($143), Delta ($144), and Southwest ($189).

  • 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 Billings Logan Intl - Lambert-St Louis or Missoula Johnson-Bell Field - 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
Fenton
Maryland Heights
Fairview Heights
Collinsville
Wentzville
Eureka
St. Peters
Festus
Glencoe
Alton
Farmington
O'Fallon

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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 May 1, 2025.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$234Average$436FlexibilityNo cancel feeOn-time63%
DeltaCheapest$236Average$448FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$268Average$531FlexibilityNo cancel feeOn-time69%
Alaska AirlinesCheapest$280Average$520FlexibilityNo cancel feeOn-time75%

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