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$200+ 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 9/25. Fares are subject to change and may not be available on all flights or dates of travel.
MTJ — STL
Aug 20 — Aug 271
Thu 8/20
Thu 8/27
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 July 21, 2026.

This United Airlines deal was found by Cheapflights users on 7/16. 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 8/612:31 pm
MTJ
-
STL
1 stop7h 55m
United Airlines
Tue 8/119:00 am
STL
-
MTJ
1 stop6h 27m
United Airlines
Deal found 7/16$378
This United Airlines deal was found by Cheapflights users on 7/16. 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.
Tue 8/43:25 pm
MTJ
-
STL
1 stop7h 32m
United Airlines
Tue 8/114:40 pm
STL
-
MTJ
1 stop4h 45m
United Airlines
Deal found 7/16$402
This Southwest deal was found by Cheapflights users on 7/16. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/59:05 am
MTJ
-
STL
2 stops7h 50m
Southwest
Tue 8/114:05 pm
STL
-
MTJ
1 stop4h 20m
Southwest
Deal found 7/16$428
This United Airlines deal was found by Cheapflights users on 7/19. 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 12/87:30 am
MTJ
-
STL
1 stop4h 13m
United Airlines
Wed 12/94:30 pm
STL
-
MTJ
1 stop4h 39m
United Airlines
Deal found 7/19$450
This United Airlines deal was found by Cheapflights users on 7/16. 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.
Sun 8/23:25 pm
MTJ
-
STL
1 stop7h 32m
United Airlines
Fri 8/76:00 am
STL
-
MTJ
1 stop6h 43m
United Airlines
Deal found 7/16$464
This Southwest deal was found by Cheapflights users on 7/16. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/49:05 am
MTJ
-
STL
2 stops9h 50m
Southwest
Tue 8/114:05 pm
STL
-
MTJ
1 stop4h 20m
Southwest
Deal found 7/16$472
This Southwest deal was found by Cheapflights users on 7/16. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/69:10 am
MTJ
-
STL
2 stops7h 10m
Southwest
Tue 8/114:05 pm
STL
-
MTJ
1 stop4h 20m
Southwest
Deal found 7/16$493
This United Airlines deal was found by Cheapflights users on 7/16. 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.
Fri 7/243:25 pm
MTJ
-
STL
1 stop7h 32m
United Airlines
Wed 7/294:48 pm
STL
-
MTJ
1 stop4h 22m
United Airlines
Deal found 7/16$504
This American Airlines deal was found by Cheapflights users on 7/18. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/212:22 pm
MTJ
-
STL
1 stop6h 26m
American Airlines
Wed 7/225:32 am
STL
-
MTJ
1 stop5h 13m
American Airlines
Deal found 7/18$509

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 July 21, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$378
(United Airlines)

One-way from

$200
(United Airlines)

Popular in

July

Cheapest in

March

Average price

$666
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. 25% potential increase in price ($145 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease ($27 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 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 July 21, 2026.
Use the filters below to find and compare flights from Montrose to St. Louis that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip
Quickest round-trip

MontroseSt. Louis

MTJ - STL

MTJSTL

Montrose County

Fri 7/24

3:25 pm-11:57 pm

1 stop7h 32m

Lambert-St Louis

Wed 7/29

4:48 pm-8:10 pm

1 stop4h 22m

$504

MontroseSt. Louis

MTJ - STL

MTJSTL

Montrose County

Thu 8/6

9:10 am-7:20 pm

2 stops9h 10m

Lambert-St Louis

Tue 8/11

12:45 pm-7:25 pm

2 stops7h 40m

$510

MontroseSt. Louis

MTJ - STL

MTJSTL

Montrose County

Sun 8/2

8:00 am-2:30 pm

2 stops5h 30m

Lambert-St Louis

Fri 8/7

12:45 pm-7:20 pm

1 stop7h 35m

$605
Cheapest one-way

MontroseSt. Louis

MTJ - STL

MTJSTL

Montrose County

Fri 9/25

9:10 am-6:05 pm

2 stops7h 55m

$219
Quickest one-way

MontroseSt. Louis

MTJ - STL

MTJSTL

Montrose County

Mon 8/10

3:25 pm-11:57 pm

1 stop7h 32m

$313

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/16

Sorted by cheapest first

Compare providers for flights from Montrose to St. Louis

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Montrose to St. Louis in July.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Montrose-St. Louis flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Montrose-St. Louis flight deals on Cheapflights vs. FlightHub >95% 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 FlightHub the most. FlightHub 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.

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 July 21, 2026.
Read reviews from past customers who have flown United 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
10,011 reviews

Boarding

7.7

Food

6.7

Overall

7.4

Crew

8.1

Comfort

7.3

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Michelle,Dec 2025

DEN - MKE

I liked that the plane waited 5 minutes for a family whose incoming plane was late. This was the last flight of the day to MKE. Flight attendants actually checked in throughout the flight. Although, not really friendly. Happy to see screens on seat backs again. This is my first time not flying first class in over 10 years. It was economy plus.
United Airlines
7.4
Good
10,011 reviews
United Airlines
7.4
Good
10,011 reviews

Boarding

7.7

Food

6.7

Overall

7.4

Crew

8.1

Comfort

7.3

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Michelle,Dec 2025

DEN - MKE

I liked that the plane waited 5 minutes for a family whose incoming plane was late. This was the last flight of the day to MKE. Flight attendants actually checked in throughout the flight. Although, not really friendly. Happy to see screens on seat backs again. This is my first time not flying first class in over 10 years. It was economy plus.

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 $504, United Airlines can have you in St. Louis from Montrose in 7h 32m. The distance from Montrose to St. Louis is about 944 mi. This flight may include one or multiple stops.

  • What is the cheapest airline to fly from Montrose to St. Louis round-trip?

    According to our current data, United Airlines ($231), offers the cheapest pricing from Montrose to St. Louis. You may be able to fly from Montrose to St. Louis for 46% less than the average price by searching for this airline.

  • 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.

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
Fenton
Swansea
Fairview Heights
Eureka
Maryland Heights
Collinsville
Wentzville
Glencoe
Chesterfield
Farmington

Browse thousands of different options on Cheapflights for your next trip

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Top airline flying from Montrose to St. Louis

Discover the top airline 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 July 21, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$231Average$381FlexibilityNo cancel feeOn-time69%

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