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$120+ 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 2/26. Fares are subject to change and may not be available on all flights or dates of travel.
MTJ — STL
Mar 15 — Mar 221
Sun 3/15
Sun 3/22
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 13, 2026.

This United Airlines deal was found by Cheapflights users on 2/11. 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 3/111:42 pm
MTJ
-
STL
1 stop5h 59m
United Airlines
Wed 3/182:50 pm
STL
-
MTJ
1 stop6h 16m
United Airlines
Deal found 2/11$211
This United Airlines deal was found by Cheapflights users on 2/10. 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 2/257:15 am
MTJ
-
STL
1 stop4h 59m
United Airlines
Wed 2/252:45 pm
STL
-
MTJ
1 stop6h 36m
United Airlines
Deal found 2/10$274
This American Airlines deal was found by Cheapflights users on 2/10. 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 2/202:38 pm
MTJ
-
STL
1 stop7h 20m
American Airlines
Sat 2/287:00 am
STL
-
MTJ
1 stop5h 34m
American Airlines
Deal found 2/10$279
This United Airlines deal was found by Cheapflights users on 2/10. 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 3/37:15 am
MTJ
-
STL
1 stop4h 59m
United Airlines
Tue 3/34:30 pm
STL
-
MTJ
1 stop4h 51m
United Airlines
Deal found 2/10$304
This American Airlines deal was found by Cheapflights users on 2/11. 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 3/112:38 pm
MTJ
-
STL
2 stops17h 13m
American Airlines
Wed 3/187:00 am
STL
-
MTJ
1 stop5h 34m
American Airlines
Deal found 2/11$305
This United Airlines deal was found by Cheapflights users on 2/8. 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 2/251:52 pm
MTJ
-
STL
1 stop7h 22m
United Airlines
Sat 2/286:00 am
STL
-
MTJ
1 stop7h 38m
United Airlines
Deal found 2/8$309
This United Airlines deal was found by Cheapflights users on 2/10. 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 7/44:50 pm
STL
-
MTJ
1 stop4h 27m
United Airlines
Deal found 2/10$322
This Southwest deal was found by Cheapflights users on 2/10. 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 3/312:40 pm
MTJ
-
STL
1 stop3h 50m
Southwest
Tue 3/37:55 pm
STL
-
MTJ
2 stops17h 05m
Southwest
Deal found 2/10$341

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 13, 2026.

Most accurate provider

Expedia
1 star

Most trusted provider

Expedia
3 stars

Round-trip from

$211
(American Airlines)

One-way from

$120
(United Airlines)
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
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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 13, 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

Wed 3/11

12:14 pm-7:29 pm

1 stop6h 15m

Lambert-St Louis

Wed 3/18

7:00 am-11:34 am

1 stop5h 34m

$211

MontroseSt. Louis

MTJ - STL

MTJSTL

Montrose County

Wed 3/11

1:42 pm-8:41 pm

1 stop5h 59m

Lambert-St Louis

Wed 3/18

2:50 pm-8:06 pm

1 stop6h 16m

$211

MontroseSt. Louis

MTJ - STL

MTJSTL

Montrose County

Wed 2/25

7:15 am-1:14 pm

1 stop4h 59m

Lambert-St Louis

Wed 2/25

2:45 pm-8:21 pm

1 stop6h 36m

$274

MontroseSt. Louis

MTJ - STL

MTJSTL

Montrose County

Tue 3/3

7:15 am-1:14 pm

1 stop4h 59m

Lambert-St Louis

Tue 3/3

4:30 pm-8:21 pm

1 stop4h 51m

$304

MontroseSt. Louis

MTJ - STL

MTJSTL

Montrose County

Wed 2/25

1:52 pm-10:14 pm

1 stop7h 22m

Lambert-St Louis

Sat 2/28

6:00 am-12:38 pm

1 stop7h 38m

$309

MontroseSt. Louis

MTJ - STL

MTJSTL

Montrose County

Thu 2/26

7:15 am-1:14 pm

1 stop4h 59m

$120

MontroseSt. Louis

MTJ - STL

MTJSTL

Montrose County

Fri 2/27

2:58 pm-11:59 pm

1 stop8h 01m

$155

MontroseSt. Louis

MTJ - STL

MTJSTL

Montrose County

Tue 2/24

2:13 pm-11:36 pm

1 stop8h 23m

$160

MontroseSt. Louis

MTJ - STL

MTJSTL

Montrose County

Mon 2/23

1:52 pm-10:14 pm

1 stop7h 22m

$160

MontroseSt. Louis

MTJ - STL

MTJSTL

Montrose County

Sun 2/22

1:32 pm-8:26 pm

1 stop5h 54m

$160

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/9

Showing 1-10 of 13 results
1
2
  • 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, October is the cheapest month in which you can book a flight from Montrose to St. Louis (average of $226). Flying from Montrose to St. Louis in May is currently the most expensive (average of $583). 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 13, 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
9,286 reviews

Comfort

7.3

Overall

7.4

Crew

8.1

Food

6.6

Entertainment

7.1

Boarding

7.7

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
9,286 reviews
United Airlines
7.4
Good
9,286 reviews

Comfort

7.3

Overall

7.4

Crew

8.1

Food

6.6

Entertainment

7.1

Boarding

7.7

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
11,277 reviews
United Airlines
7.4
Good
9,286 reviews

Comfort

7.3

Overall

7.4

Crew

8.1

Food

6.6

Entertainment

7.1

Boarding

7.7

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 $211, American Airlines can have you in St. Louis from Montrose in 5h 59m. 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.

  • 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, October is the cheapest month in which you can book a flight from Montrose to St. Louis (average of $226). Flying from Montrose to St. Louis in May is currently the most expensive (average of $583). 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

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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 13, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$182Average$510FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$227Average$436FlexibilityNo cancel feeOn-time71%

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