$325+ 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 9/24. Fares are subject to change and may not be available on all flights or dates of travel.
MTJ — STL
Oct 4 — Oct 111
Round-trip
1 adult, Economy
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Find cheap flights from Montrose to St. Louis with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Montrose to St. Louis
Cheapest
Best
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Cheapest flights from Montrose to St. LouisExplore 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 September 4, 2026.
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 September 4, 2026.
This United Airlines deal was found by Cheapflights users on 9/1. 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 9/243:23 pm -
1 stop4h 13m
Sat 9/264:49 pm -
1 stop4h 50m
Deal found 9/1![United Airlines logo]()
$325
This United Airlines deal was found by Cheapflights users on 9/2. 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 11/57:15 am -
1 stop4h 23m
Sun 11/88:50 am -
1 stop4h 46m
Deal found 9/2![United Airlines logo]()
$371
This American Airlines deal was found by Cheapflights users on 9/1. 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.
Thu 10/81:14 pm -
1 stop7h 45m
Mon 10/125:40 am -
1 stop7h 43m
Deal found 9/1![American Airlines logo]()
$377
This American Airlines deal was found by Cheapflights users on 9/2. 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 10/231:14 pm -
1 stop7h 45m
Sun 10/256:32 am -
1 stop6h 51m
Deal found 9/2![American Airlines logo]()
$384
This United Airlines deal was found by Cheapflights users on 8/30. 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 9/253:23 pm -
1 stop7h 21m
Mon 9/289:00 am -
1 stop4h 35m
Deal found 8/30![United Airlines logo]()
$385
This United Airlines deal was found by Cheapflights users on 8/31. 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 10/21:37 pm -
1 stop5h 59m
Sat 10/106:00 am -
2 stops9h 27m
Deal found 8/31![United Airlines logo]()
$394
This American Airlines deal was found by Cheapflights users on 8/30. 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.
Thu 9/242:21 pm -
1 stop6h 36m
Sun 9/277:00 am -
1 stop7h 26m
Deal found 8/30![American Airlines logo]()
$411
Best flights from Montrose to St. LouisDiscover carefully curated flight deals from Montrose to St. Louis that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 4, 2026.
Discover carefully curated flight deals from Montrose to St. Louis that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 4, 2026.
This American Airlines deal was found by Cheapflights users on 9/1. 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 10/231:14 pm -
1 stop7h 45m
Sun 10/256:32 am -
1 stop6h 51m
Deal found 9/1![American Airlines logo]()
$384
This United Airlines deal was found by Cheapflights users on 9/2. 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 11/51:40 pm -
1 stop6h 19m
Sun 11/85:00 am -
2 stops8h 36m
Deal found 9/2![United Airlines logo]()
$386
This Southwest deal was found by Cheapflights users on 9/1. 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 9/249:10 am -
2 stops7h 55m
Sat 9/269:00 am -
2 stops10h 25m
Deal found 9/1![Southwest logo]()
$457
This United Airlines deal was found by Cheapflights users on 8/31. 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 10/21:37 pm -
1 stop5h 59m
Sat 10/106:00 am -
2 stops9h 27m
Deal found 8/31![United Airlines logo]()
$394
This American Airlines deal was found by Cheapflights users on 9/1. 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.
Thu 10/81:14 pm -
1 stop7h 45m
Mon 10/126:07 pm -
2 stops19h 16m
Deal found 9/1![American Airlines logo]()
$502
This United Airlines deal was found by Cheapflights users on 9/1. 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 9/253:23 pm -
1 stop7h 21m
Sun 9/279:00 am -
1 stop6h 27m
Deal found 9/1![United Airlines logo]()
$469
This United Airlines deal was found by Cheapflights users on 8/31. 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 10/231:37 pm -
2 stops8h 22m
Sun 10/258:50 am -
1 stop4h 46m
Deal found 8/31![United Airlines logo]()
$486
Last-minute flights from Montrose to St. LouisDiscover last-minute flight deals from Montrose to St. Louis. Data last updated September 4, 2026 and is based on user searches.
Discover last-minute flight deals from Montrose to St. Louis. Data last updated September 4, 2026 and is based on user searches.
This United Airlines deal was found by Cheapflights users on 9/1. 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 9/243:23 pm -
1 stop4h 13m
Sat 9/264:49 pm -
1 stop4h 50m
Deal found 9/1![United Airlines logo]()
$325
This American Airlines deal was found by Cheapflights users on 8/30. 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.
Thu 9/242:21 pm -
1 stop6h 36m
Sun 9/277:00 am -
1 stop7h 26m
Deal found 8/30![American Airlines logo]()
$411
This United Airlines deal was found by Cheapflights users on 8/30. 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 9/253:23 pm -
1 stop7h 21m
Mon 9/289:00 am -
1 stop4h 35m
Deal found 8/30![United Airlines logo]()
$385
This American Airlines deal was found by Cheapflights users on 9/1. 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 9/252:21 pm -
2 stops18h 57m
Sun 9/275:43 am -
1 stop4h 58m
Deal found 9/1![American Airlines logo]()
$436
This United Airlines deal was found by Cheapflights users on 8/31. 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 10/21:37 pm -
1 stop5h 59m
Sat 10/106:00 am -
2 stops9h 27m
Deal found 8/31![United Airlines logo]()
$394
This Southwest deal was found by Cheapflights users on 8/31. 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.
Fri 10/28:35 am -
1 stop7h 25m
Sat 10/108:55 am -
1 stop10h 30m
Deal found 8/31![Southwest logo]()
$452
This American Airlines deal was found by Cheapflights users on 9/1. 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.
Thu 10/81:14 pm -
1 stop7h 45m
Mon 10/125:40 am -
1 stop7h 43m
Deal found 9/1![American Airlines logo]()
$377
This American Airlines deal was found by Cheapflights users on 9/2. 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 10/231:14 pm -
1 stop7h 45m
Sun 10/256:32 am -
1 stop6h 51m
Deal found 9/2![American Airlines logo]()
$384
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 September 4, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $325 (United Airlines) |
Popular in | July |
Cheapest in | March |
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 7,457,451 searches. Data last updated September 4, 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
Cheapest round-trip
MontroseSt. Louis
MTJ Montrose County - STL Lambert-St Louis
MTJSTL
Montrose County
Fri 10/23
1:14 pm-9:59 pm
1 stop7h 45m
Lambert-St Louis
Sun 10/25
6:32 am-12:23 pm
1 stop6h 51m
$384
MontroseSt. Louis
MTJ Montrose County - STL Lambert-St Louis
MTJSTL
Montrose County
Thu 11/5
1:40 pm-8:59 pm
1 stop6h 19m
Lambert-St Louis
Sun 11/8
5:00 am-12:36 pm
2 stops8h 36m
$386
MontroseSt. Louis
MTJ Montrose County - STL Lambert-St Louis
MTJSTL
Montrose County
Fri 10/2
1:37 pm-8:36 pm
1 stop5h 59m
Lambert-St Louis
Sat 10/10
6:00 am-2:27 pm
2 stops9h 27m
$394
MontroseSt. Louis
MTJ Montrose County - STL Lambert-St Louis
MTJSTL
Montrose County
Thu 9/24
9:10 am-6:05 pm
2 stops7h 55m
Lambert-St Louis
Sat 9/26
9:00 am-6:25 pm
2 stops10h 25m
$457
MontroseSt. Louis
MTJ Montrose County - STL Lambert-St Louis
MTJSTL
Montrose County
Fri 9/25
3:23 pm-11:44 pm
1 stop7h 21m
Lambert-St Louis
Sun 9/27
9:00 am-2:27 pm
1 stop6h 27m
$469
Quickest round-trip
MontroseSt. Louis
MTJ Montrose County - STL Lambert-St Louis
MTJSTL
Montrose County
Fri 10/23
1:37 pm-10:59 pm
2 stops8h 22m
Lambert-St Louis
Sun 10/25
8:50 am-12:36 pm
1 stop4h 46m
$486
MontroseSt. Louis
MTJ Montrose County - STL Lambert-St Louis
MTJSTL
Montrose County
Thu 10/8
1:14 pm-9:59 pm
1 stop7h 45m
Lambert-St Louis
Mon 10/12
6:07 pm-12:23 pm
2 stops19h 16m
$502
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 September.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
- 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.
MTJ-STL
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 September 4, 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.
Entertainment
7.1
Food
6.7
Crew
8.1
Comfort
7.3
Boarding
7.7
Overall
7.4
Reviews
1 / 20
10.0
ExcellentMichelle,Dec 2025
DEN - MKE
Entertainment
7.1
Food
6.7
Crew
8.1
Comfort
7.3
Boarding
7.7
Overall
7.4
Reviews
1 / 20
10.0
ExcellentMichelle,Dec 2025
DEN - MKE
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.
Traveling to a place near St. Louis?
Book flights to St. Louis if you plan to visit one of these locationsEdwardsville
Fairview Heights
O'Fallon
Fenton
Swansea
Eureka
Maryland Heights
Collinsville
Wentzville
Glencoe
Chesterfield
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Montrose and St. Louis flights
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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 7,457,451 searches. Data last updated September 4, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$231 | Average$381 | FlexibilityNo cancel fee | On-time69% |