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$286+ Cheap flights from Montrose to St. Louis (MTJ - 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 9/23. Fares are subject to change and may not be available on all flights or dates of travel.
MTJ — STL
Oct 17 — Oct 241
Fri 10/17
Fri 10/24
1 adult, Economy
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Cheap flight deals from Montrose to St. Louis

Discover tips and strategies to find the most affordable flight options for your journey from Montrose (MTJ) to St. Louis (STL). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated September 17, 2025.

Round-trip from

$321
(American Airlines)

One-way from

$286
(American Airlines)

Popular in

July

Cheapest in

August

Average price

$264
From Montrose County to Lambert-St Louis
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One-way flight from Montrose County to Lambert-St Louis
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Highest demand for flights based on searches. 3% potential increase in price ($16 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($24 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find flight deals from Montrose to St. Louis

Cheapest flights from Montrose to St. Louis
Explore the most affordable flight options available from Montrose to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 17, 2025.

This American Airlines deal was found by Cheapflights users on 9/16. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/12:38 pmMTJ - STL
1 stop4h 37mAmerican Airlines
Sun 10/58:50 amSTL - MTJ
1 stop5h 55mAmerican Airlines
Deal found 9/16$321
This United Airlines deal was found by Cheapflights users on 9/16. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/17:30 amMTJ - STL
1 stop4h 14mUnited Airlines
Sun 10/55:00 amSTL - MTJ
2 stops8h 46mUnited Airlines
Deal found 9/16$401
This United Airlines deal was found by Cheapflights users on 9/16. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/91:45 pmMTJ - STL
1 stop6h 01mUnited Airlines
Mon 10/135:15 amSTL - MTJ
1 stop16h 04mUnited Airlines
Deal found 9/16$412
This United Airlines deal was found by Cheapflights users on 9/15. 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.
Sat 11/221:30 pmMTJ - STL
1 stop7h 24mUnited Airlines
Fri 11/284:43 pmSTL - MTJ
1 stop4h 37mUnited Airlines
Deal found 9/15$499
This American Airlines deal was found by Cheapflights users on 9/17. 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 9/232:38 pmMTJ - STL
1 stop7h 12mAmerican Airlines
Tue 9/307:16 amSTL - MTJ
1 stop7h 16mAmerican Airlines
Deal found 9/17$531
This United Airlines deal was found by Cheapflights users on 9/17. 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 9/233:24 pmMTJ - STL
1 stop4h 22mUnited Airlines
Tue 9/306:30 amSTL - MTJ
2 stops8h 59mUnited Airlines
Deal found 9/17$536
This United Airlines deal was found by Cheapflights users on 9/17. 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 9/237:30 amMTJ - STL
1 stop4h 13mUnited Airlines
Tue 9/234:40 pmSTL - MTJ
1 stop4h 42mUnited Airlines
Deal found 9/17$565

Cheapflights Fare Finder

 
Customize your flight search to find flights from Montrose 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 September 17, 2025.
Use the filters below to find and compare flights from Montrose to St. Louis that are best for you.

Fly from

Montrose

Fly to

St. Louis

Route

Depart

Return

Price

MontroseSt. Louis

MTJ - STL

MTJSTL

Montrose County

Wed 10/1

2:38 pm-8:15 pm

1 stop4h 37m

Lambert-St Louis

Sun 10/5

8:50 am-1:45 pm

1 stop5h 55m

$321

MontroseSt. Louis

MTJ - STL

MTJSTL

Montrose County

Wed 10/1

7:30 am-12:44 pm

1 stop4h 14m

Lambert-St Louis

Sun 10/5

5:00 am-12:46 pm

2 stops8h 46m

$401

MontroseSt. Louis

MTJ - STL

MTJSTL

Montrose County

Thu 10/9

1:45 pm-8:46 pm

1 stop6h 01m

Lambert-St Louis

Mon 10/13

5:15 am-8:19 pm

1 stop16h 04m

$412

MontroseSt. Louis

MTJ - STL

MTJSTL

Montrose County

Sat 11/22

1:30 pm-9:54 pm

1 stop7h 24m

Lambert-St Louis

Fri 11/28

4:43 pm-8:20 pm

1 stop4h 37m

$499

MontroseSt. Louis

MTJ - STL

MTJSTL

Montrose County

Fri 12/19

12:21 pm-7:22 pm

1 stop6h 01m

Lambert-St Louis

Fri 12/26

9:36 am-11:43 am

1 stop27h 07m

$837

MontroseSt. Louis

MTJ - STL

MTJSTL

Montrose County

Tue 9/23

2:38 pm-10:50 pm

1 stop7h 12m

$286

MontroseSt. Louis

MTJ - STL

MTJSTL

Montrose County

Tue 9/23

7:30 am-7:13 pm

2 stops10h 43m

$291

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/17

Best time to book a flight from Montrose to St. Louis

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

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

Currently, August is the cheapest month in which you can book a flight from Montrose to St. Louis (average of $311). Flying from Montrose 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 September 17, 2025.
Read reviews from past customers who have flown United Airlines and American Airlines from Montrose to St. Louis. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
8,926 reviews

Crew

8.1

Food

6.6

Boarding

7.7

Comfort

7.3

Entertainment

7.1

Overall

7.4

Reviews

1 / 20
10.0
Excellent

Julia,Sep 2025

BUF - DEN

The staff were amazing, from check in to boarding and on the flight. The range of entertainment options were really good as well.
United Airlines
7.4
Good
8,926 reviews
United Airlines
7.4
Good
8,926 reviews

Crew

8.1

Food

6.6

Boarding

7.7

Comfort

7.3

Entertainment

7.1

Overall

7.4

Reviews

1 / 20
10.0
Excellent

Julia,Sep 2025

BUF - DEN

The staff were amazing, from check in to boarding and on the flight. The range of entertainment options were really good as well.
American Airlines
7.2
Good
10,000 reviews
United Airlines
7.4
Good
8,926 reviews

Crew

8.1

Food

6.6

Boarding

7.7

Comfort

7.3

Entertainment

7.1

Overall

7.4

Reviews

1 / 20
10.0
Excellent

Julia,Sep 2025

BUF - DEN

The staff were amazing, from check in to boarding and on the flight. The range of entertainment options were really good as well.

Related info for your journey

Find useful and relevant information for your journey from Montrose to St. Louis. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

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

    For as low as $401, American Airlines can have you in St. Louis from Montrose in 4h 14m. The distance from Montrose to St. Louis is about 944 mi. This flight may include one or multiple stops.

  • What are the cheapest airlines flying from Montrose to St. Louis round-trip?

    According to our current data, United Airlines ($182), and American Airlines ($227) offers the cheapest pricing from Montrose to St. Louis. You may be able to fly from Montrose to St. Louis for 57% less than the average price by searching for these airlines.

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

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

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

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

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

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

    Currently, August is the cheapest month in which you can book a flight from Montrose to St. Louis (average of $311). Flying from Montrose 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
Edwardsville
O'Fallon
Fairview Heights
Maryland Heights
Collinsville
Eureka
Glencoe
St. Peters
Chesterfield
Alton
Farmington
Festus

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Alternative routes for Montrose to St. Louis

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Top 2 airlines flying from Montrose to St. Louis

Discover the top 2 airlines that operate flights from Montrose 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 September 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$182Average$421FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$227Average$436FlexibilityNo cancel feeOn-time71%

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