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$160+ 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 2/23. Fares are subject to change and may not be available on all flights or dates of travel.
MTJ — STL
Mar 21 — Mar 281
Sat 3/21
Sat 3/28
1 adult, Economy
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Cheap 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 February 19, 2026.

This United Airlines deal was found by Cheapflights users on 2/18. 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 3/63:39 pm
MTJ
-
STL
1 stop6h 55m
United Airlines
Tue 3/106:00 am
STL
-
MTJ
1 stop7h 46m
United Airlines
Deal found 2/18$239
This United Airlines deal was found by Cheapflights users on 2/15. 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 9/51:35 pm
MTJ
-
STL
1 stop6h 24m
United Airlines
Tue 9/89:13 am
STL
-
MTJ
1 stop4h 28m
United Airlines
Deal found 2/15$281
This United Airlines deal was found by Cheapflights users on 2/18. 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 6/261:36 pm
MTJ
-
STL
1 stop6h 06m
United Airlines
Sat 7/46:00 am
STL
-
MTJ
1 stop6h 26m
United Airlines
Deal found 2/18$322
This American Airlines deal was found by Cheapflights users on 2/15. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/510:51 am
MTJ
-
STL
1 stop5h 00m
American Airlines
Tue 9/87:01 am
STL
-
MTJ
1 stop7h 46m
American Airlines
Deal found 2/15$341
This United Airlines deal was found by Cheapflights users on 2/14. 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.
Wed 2/252:58 pm
MTJ
-
STL
1 stop8h 01m
United Airlines
Sat 2/284:30 pm
STL
-
MTJ
1 stop4h 51m
United Airlines
Deal found 2/14$349
This United Airlines deal was found by Cheapflights users on 2/18. 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 7/21:36 pm
MTJ
-
STL
1 stop6h 06m
United Airlines
Mon 7/64:50 pm
STL
-
MTJ
1 stop4h 27m
United Airlines
Deal found 2/18$363

Find 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 February 19, 2026.

Most accurate provider

Expedia
1 star

Most trusted provider

Expedia
3 stars

Round-trip from

$239
(United Airlines)

One-way from

$160
(United Airlines)

Popular in

July

Cheapest in

September

Average price

$373
Provider with most accurate pricing for Montrose County-Lambert-St Louis flight deals.
Search Deals
Provider most trusted by Cheapflights users for Montrose County-Lambert-St Louis flights.
Search Deals
From Montrose County to Lambert-St Louis
Search Deals
One-way flight from Montrose County to Lambert-St Louis
Search Deals
Highest demand for flights based on searches. 6% potential increase in price ($27 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 7% potential price decrease ($29 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 2026
Search Deals

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 February 19, 2026.
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

Fri 3/6

3:39 pm-11:34 pm

1 stop6h 55m

Lambert-St Louis

Tue 3/10

6:00 am-12:46 pm

1 stop7h 46m

$239

MontroseSt. Louis

MTJ - STL

MTJSTL

Montrose County

Fri 6/26

1:36 pm-8:42 pm

1 stop6h 06m

Lambert-St Louis

Sat 7/4

4:50 pm-8:17 pm

1 stop4h 27m

$322

MontroseSt. Louis

MTJ - STL

MTJSTL

Montrose County

Mon 3/2

2:58 pm-11:59 pm

1 stop8h 01m

Lambert-St Louis

Fri 3/6

5:00 am-12:02 pm

1 stop8h 02m

$349

MontroseSt. Louis

MTJ - STL

MTJSTL

Montrose County

Thu 7/2

1:36 pm-8:42 pm

1 stop6h 06m

Lambert-St Louis

Mon 7/6

4:50 pm-8:17 pm

1 stop4h 27m

$363

MontroseSt. Louis

MTJ - STL

MTJSTL

Montrose County

Mon 2/23

1:52 pm-10:14 pm

1 stop7h 22m

$160

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/15

  • Most accurate provider: When it comes to deals on Montrose-St. Louis flights, users find the pricing of Expedia to be most consistent on Cheapflights vs. Expedia Users can find the same prices on Montrose-St. Louis flight deals on Cheapflights vs. Expedia <90% of the time. Price accuracy is based on data collected from Montrose-St. Louis flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Montrose-St. Louis flights, Cheapflights users trust Expedia the most. Expedia has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Montrose-St. Louis flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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, September is the cheapest month in which you can book a flight from Montrose to St. Louis (average of $182). Flying from Montrose to St. Louis in July is currently the most expensive (average of $413). 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 February 19, 2026.
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
9,321 reviews

Crew

8.1

Comfort

7.3

Overall

7.4

Food

6.6

Boarding

7.7

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family
United Airlines
7.4
Good
9,321 reviews
United Airlines
7.4
Good
9,321 reviews

Crew

8.1

Comfort

7.3

Overall

7.4

Food

6.6

Boarding

7.7

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family
American Airlines
7.2
Good
11,313 reviews
United Airlines
7.4
Good
9,321 reviews

Crew

8.1

Comfort

7.3

Overall

7.4

Food

6.6

Boarding

7.7

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family

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 $239, United Airlines can have you in St. Louis from Montrose in 6h 55m. The distance from Montrose to St. Louis is about 944 mi.

  • 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 56% 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, September is the cheapest month in which you can book a flight from Montrose to St. Louis (average of $182). Flying from Montrose to St. Louis in July is currently the most expensive (average of $413). 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
Swansea
Fairview Heights
Maryland Heights
Collinsville
Eureka
Glencoe
Chesterfield
Alton
Farmington
Festus

Browse thousands of different options on Cheapflights for your next trip

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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 February 19, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$182Average$510FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$227Average$436FlexibilityNo cancel feeOn-time71%

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