$119 Cheap United flights St. Louis (STL) to Montrose (MTJ)

View $119 flight on Tue, Sep 9, 2025Opens in a new window

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$119 Cheap United flights St. Louis (STL) to Montrose (MTJ)

Prices were available within the past 7 days and start at $119 for one-way flights and $307 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Tue, Sep 23 - Wed, Oct 1
STL
St. Louis
MTJ
Montrose
$307 Roundtrip, just found
$307
Roundtrip
just found
Select United flight, departing Tue, Sep 23 from St. Louis to Montrose, returning Wed, Oct 1, priced at $307 just found
United
Sat, Sep 27 - Wed, Oct 1
STL
St. Louis
MTJ
Montrose
$309 Roundtrip, just found
$309
Roundtrip
just found
Select United flight, departing Sat, Sep 27 from St. Louis to Montrose, returning Wed, Oct 1, priced at $309 just found
United
Sat, Jul 19 - Wed, Jul 23
STL
St. Louis
MTJ
Montrose
$326 Roundtrip, found 2 days ago
$326
Roundtrip
found 2 days ago
Select United flight, departing Sat, Jul 19 from St. Louis to Montrose, returning Wed, Jul 23, priced at $326 found 2 days ago
United
Mon, Aug 25 - Sun, Aug 31
STL
St. Louis
MTJ
Montrose
$334 Roundtrip, found 1 day ago
$334
Roundtrip
found 1 day ago
Select United flight, departing Mon, Aug 25 from St. Louis to Montrose, returning Sun, Aug 31, priced at $334 found 1 day ago
United
Sat, Aug 30 - Sun, Aug 31
STL
St. Louis
MTJ
Montrose
$336 Roundtrip, found 1 day ago
$336
Roundtrip
found 1 day ago
Select United flight, departing Sat, Aug 30 from St. Louis to Montrose, returning Sun, Aug 31, priced at $336 found 1 day ago
United
Wed, Sep 17 - Thu, Sep 25
STL
St. Louis
MTJ
Montrose
$351 Roundtrip, found 4 hours ago
$351
Roundtrip
found 4 hours ago
Select United flight, departing Wed, Sep 17 from St. Louis to Montrose, returning Thu, Sep 25, priced at $351 found 4 hours ago
Flights from St. Louis (STL) to Montrose (MTJ)
Origin airport
Lambert-St. Louis Intl.
Destination airport
Montrose Regional
Airlines serving
American Airlines, Southwest Airlines, United
Popular airline
American Airlines
Distance
945 mi

Frequently asked questions

How much is a United Airlines flight from Lambert-St. Louis Intl. Airport (STL) to Montrose Regional Airport (MTJ)?
Use the "Price (lowest to highest)" filter on Expedia to look for cheap United Airlines round-trip flights from $307 from STL to MTJ. Affordable one-way tickets from $119 are also available.**These prices were available on Expedia within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.
What is the cheapest month to fly from STL to MTJ with United Airlines?
United Airlines flights to Montrose are usually cheaper in the off-peak months of January and February. Whether you need a one-way or a return ticket, you could score a better deal then.
What is the cheapest time to book flights from Lambert-St. Louis Intl. Airport (STL) to Montrose Regional Airport (MTJ) with United Airlines?
Search for affordable United Airlines flights from Lambert-St. Louis Intl. Airport (STL) to Montrose Regional Airport (MTJ) one to three months before your departure date. Travelers who book domestic flights 34 to 86 days in advance can save 25% compared to those who book just 6 to 12 days ahead. Regardless of fare class and journey, the best day to book a domestic flight is usually Sunday and the most expensive day is typically Monday. Passengers who book on a Sunday can save 6% on average compared to those who book on a Monday.**Ideal booking window recommendation is based on average round-trip ticket prices for January through November for 2024. Best day of the week to book recommendation is based on average round-trip ticket prices for January through October 2024. All data sourced from ARC's global airline sales database.
Does United Airlines fly nonstop from Lambert-St. Louis Intl. Airport (STL) to Montrose Regional Airport (MTJ)?
Use our "Nonstop" filter when searching for direct United Airlines flights from STL to MTJ. It's also a good way to compare other carriers servicing the same nonstop route.
What is the earliest United Airlines flight from STL to MTJ?
Sort your results by "Early Morning" and "Morning" to see the earliest departures from STL to MTJ. Heading off early means you're 20% less likely to experience cancellations.**Most reliable time of the day recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
What airports does United Airlines fly into in Montrose?
United Airlines flights from Lambert-St. Louis Intl. Airport (STL) to Montrose land at Montrose Regional Airport (MTJ). This is the main gateway to this destination.
Why fly with United Airlines from STL to MTJ?
A rewarding loyalty program and the ability to rack up points through United Mileage Plus are the start of the reasons to fly from STL to MTJ with United Airlines. Plus, when you sign up to Expedia's free One Key™ program, you can receive OneKeyCash™* alongside any airline loyalty program earnings. You can put it toward your future trips.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.
Can I change or cancel my United Airlines flight from Lambert-St. Louis Intl. Airport (STL) to Montrose Regional Airport (MTJ)?
Depending on your ticket type, a fee generally applies if you change or cancel your flight more than 24 hours after it's been confirmed. To find flexible plane tickets, select our "Changes included" or "No cancel fee" filter when you search for flights. For additional information on canceling or changing your reservation, visit "Trips," select your flight and tick "Manage Booking."

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