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$319+ Cheap flights from Montrose to St. Louis (MTJ - STL)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 8/27. Fares are subject to change and may not be available on all flights or dates of travel.
MTJ — STL
ago. 19 — ago. 261
mar. 8/19
mar. 8/26
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 agosto 14, 2025.

Round-trip from

$319
(United Airlines)

Popular in

August

Cheapest in

April

Average price

$997
From Montrose County to Lambert-St Louis
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Highest demand for flights based on searches. 25% potential increase in price ($169 potential increase over avg. RT price).
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Cheapest flight prices on average. 12% potential price decrease ($56 potential savings vs. average RT price).
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Average for round-trip flights in August 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 agosto 14, 2025.

This United Airlines deal was found by Cheapflights users on 8/14. 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.
mié. 8/271:05 pmMTJ - STL
1 stop5h 22mUnited Airlines
jue. 9/49:00 amSTL - MTJ
1 stop4h 47mUnited Airlines
Deal found 8/14$319
This Southwest deal was found by Cheapflights users on 8/14. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 11/2212:10 pmMTJ - STL
1 stop10h 40mSouthwest
vie. 11/285:30 amSTL - MTJ
1 stop6h 35mSouthwest
Deal found 8/14$348
This American Airlines deal was found by Cheapflights users on 8/12. 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.
vie. 8/2210:42 amMTJ - STL
1 stop4h 26mAmerican Airlines
mar. 8/267:01 amSTL - MTJ
1 stop7h 46mAmerican Airlines
Deal found 8/12$421
This United Airlines deal was found by Cheapflights users on 8/12. 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.
vie. 8/221:43 pmMTJ - STL
1 stop6h 03mUnited Airlines
mar. 8/266:35 amSTL - MTJ
2 stops8h 53mUnited Airlines
Deal found 8/12$426
This United Airlines deal was found by Cheapflights users on 8/14. 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.
vie. 8/291:43 pmMTJ - STL
1 stop6h 03mUnited Airlines
mar. 9/24:40 pmSTL - MTJ
1 stop4h 42mUnited Airlines
Deal found 8/14$461
This Southwest deal was found by Cheapflights users on 8/14. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 11/2212:10 pmMTJ - STL
1 stop10h 40mSouthwest
sáb. 11/295:35 amSTL - MTJ
1 stop7h 00mSouthwest
Deal found 8/14$467

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 agosto 14, 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

mié. 8/27

1:05 pm-7:27 pm

1 stop5h 22m

Lambert-St Louis

jue. 9/4

9:00 am-12:47 pm

1 stop4h 47m

$319

MontroseSt. Louis

MTJ - STL

MTJSTL

Montrose County

sáb. 11/22

12:10 pm-11:50 pm

1 stop10h 40m

Lambert-St Louis

vie. 11/28

5:30 am-11:05 am

1 stop6h 35m

$348

MontroseSt. Louis

MTJ - STL

MTJSTL

Montrose County

vie. 8/29

1:43 pm-8:46 pm

1 stop6h 03m

Lambert-St Louis

mar. 9/2

4:40 pm-8:22 pm

1 stop4h 42m

$461

MontroseSt. Louis

MTJ - STL

MTJSTL

Montrose County

sáb. 11/22

12:10 pm-11:50 pm

1 stop10h 40m

Lambert-St Louis

sáb. 11/29

5:35 am-11:35 am

1 stop7h 00m

$467

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/14

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 agosto 14, 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
8,916 reviews

Crew

8.1

Boarding

7.7

Food

6.6

Overall

7.4

Entertainment

7.1

Comfort

7.3

Reviews

1 / 20
2.0
Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!
United Airlines
7.4
Good
8,916 reviews
United Airlines
7.4
Good
8,916 reviews

Crew

8.1

Boarding

7.7

Food

6.6

Overall

7.4

Entertainment

7.1

Comfort

7.3

Reviews

1 / 20
2.0
Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!
American Airlines
7.2
Good
10,000 reviews
United Airlines
7.4
Good
8,916 reviews

Crew

8.1

Boarding

7.7

Food

6.6

Overall

7.4

Entertainment

7.1

Comfort

7.3

Reviews

1 / 20
2.0
Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!

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.

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

    According to our current data, United Airlines ($237), and American Airlines ($337) offers the cheapest pricing from Montrose to St. Louis. You may be able to fly from Montrose to St. Louis for 52% 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
O'Fallon
Fairview Heights
Maryland Heights
Collinsville
Eureka
St. Peters
Glencoe
Alton
Chesterfield
Farmington
Festus

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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 agosto 14, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$237Average$421FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$337Average$436FlexibilityNo cancel feeOn-time71%

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