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Flights from St. Louis to Denver (STL to DEN)

Discover alternate routes & cheap one way flights from St. Louis to Denver (STL to DEN) within a departure date range.

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  • USD 22
    Frontier Airlines
    2:11pm - 3:49pm
    Sat Jan 21st
    2h 38m
    St. Louis (STL) → Denver (DEN)
    Direct

    Sat Jan 21st 2023 Frontier Airlines · F9 699 Depart at 2:11 pm from St. Louis (STL) Fly for 2h 38m Arrive at 3:49 pm in Denver (DEN)

  • USD 33
    Frontier Airlines
    2:11pm - 3:49pm
    Wed Jan 18th
    2h 38m
    St. Louis (STL) → Denver (DEN)
    Direct

    Wed Jan 18th 2023 Frontier Airlines · F9 699 Depart at 2:11 pm from St. Louis (STL) Fly for 2h 38m Arrive at 3:49 pm in Denver (DEN)

  • USD 44
    Frontier Airlines
    2:11pm - 3:49pm
    Sat Jan 14th
    2h 38m
    St. Louis (STL) → Denver (DEN)
    Direct

    Sat Jan 14th 2023 Frontier Airlines · F9 699 Depart at 2:11 pm from St. Louis (STL) Fly for 2h 38m Arrive at 3:49 pm in Denver (DEN)

  • USD 44
    Frontier Airlines
    2:11pm - 3:49pm
    Mon Jan 9th
    2h 38m
    St. Louis (STL) → Denver (DEN)
    Direct

    Mon Jan 9th 2023 Frontier Airlines · F9 699 Depart at 2:11 pm from St. Louis (STL) Fly for 2h 38m Arrive at 3:49 pm in Denver (DEN)

  • USD 44
    Frontier Airlines
    2:41pm - 4:19pm
    Thu Jan 12th
    2h 38m
    St. Louis (STL) → Denver (DEN)
    Direct

    Thu Jan 12th 2023 Frontier Airlines · F9 699 Depart at 2:41 pm from St. Louis (STL) Fly for 2h 38m Arrive at 4:19 pm in Denver (DEN)

  • USD 44
    Frontier Airlines
    2:41pm - 4:19pm
    Sun Jan 15th
    2h 38m
    St. Louis (STL) → Denver (DEN)
    Direct

    Sun Jan 15th 2023 Frontier Airlines · F9 699 Depart at 2:41 pm from St. Louis (STL) Fly for 2h 38m Arrive at 4:19 pm in Denver (DEN)

  • USD 45
    Frontier Airlines
    2:41pm - 4:19pm
    Sun Jan 22nd
    2h 38m
    St. Louis (STL) → Denver (DEN)
    Direct

    Sun Jan 22nd 2023 Frontier Airlines · F9 699 Depart at 2:41 pm from St. Louis (STL) Fly for 2h 38m Arrive at 4:19 pm in Denver (DEN)

  • USD 45
    Frontier Airlines
    2:11pm - 3:49pm
    Mon Jan 23rd
    2h 38m
    St. Louis (STL) → Denver (DEN)
    Direct

    Mon Jan 23rd 2023 Frontier Airlines · F9 699 Depart at 2:11 pm from St. Louis (STL) Fly for 2h 38m Arrive at 3:49 pm in Denver (DEN)

  • USD 45
    Frontier Airlines
    2:11pm - 3:49pm
    Mon Jan 16th
    2h 38m
    St. Louis (STL) → Denver (DEN)
    Direct

    Mon Jan 16th 2023 Frontier Airlines · F9 699 Depart at 2:11 pm from St. Louis (STL) Fly for 2h 38m Arrive at 3:49 pm in Denver (DEN)

  • USD 45
    Frontier Airlines
    2:41pm - 4:19pm
    Thu Jan 19th
    2h 38m
    St. Louis (STL) → Denver (DEN)
    Direct

    Thu Jan 19th 2023 Frontier Airlines · F9 699 Depart at 2:41 pm from St. Louis (STL) Fly for 2h 38m Arrive at 4:19 pm in Denver (DEN)

  • USD 45
    Frontier Airlines
    2:11pm - 3:49pm
    Sat Jan 7th
    2h 38m
    St. Louis (STL) → Denver (DEN)
    Direct

    Sat Jan 7th 2023 Frontier Airlines · F9 699 Depart at 2:11 pm from St. Louis (STL) Fly for 2h 38m Arrive at 3:49 pm in Denver (DEN)

  • USD 45
    Frontier Airlines
    2:11pm - 3:49pm
    Fri Jan 20th
    2h 38m
    St. Louis (STL) → Denver (DEN)
    Direct

    Fri Jan 20th 2023 Frontier Airlines · F9 699 Depart at 2:11 pm from St. Louis (STL) Fly for 2h 38m Arrive at 3:49 pm in Denver (DEN)

  • USD 51
    Frontier Airlines
    2:11pm - 3:49pm
    Wed Jan 11th
    2h 38m
    St. Louis (STL) → Denver (DEN)
    Direct

    Wed Jan 11th 2023 Frontier Airlines · F9 699 Depart at 2:11 pm from St. Louis (STL) Fly for 2h 38m Arrive at 3:49 pm in Denver (DEN)

  • USD 55
    Frontier Airlines
    2:11pm - 3:49pm
    Fri Jan 13th
    2h 38m
    St. Louis (STL) → Denver (DEN)
    Direct

    Fri Jan 13th 2023 Frontier Airlines · F9 699 Depart at 2:11 pm from St. Louis (STL) Fly for 2h 38m Arrive at 3:49 pm in Denver (DEN)

  • USD 66
    Frontier Airlines
    12:05pm - 7:15pm
    Tue Jan 24th
    8h 10m
    St. Louis (STL) → Denver (DEN)
    1 Stop

    Tue Jan 24th 2023 Frontier Airlines · F9 2095 Depart at 12:05 pm from St. Louis (STL) Fly for 3h 49m Arrive at 1:54 pm in Las Vegas (LAS)

    Layover in Las Vegas for 2h 21m

    Tue Jan 24th 2023 Frontier Airlines · F9 780 Depart at 4:15 pm from Las Vegas (LAS) Fly for 2h 0m Arrive at 7:15 pm in Denver (DEN)

  • USD 69
    Frontier Airlines
    2:41pm - 4:19pm
    Thu Jan 5th
    2h 38m
    St. Louis (STL) → Denver (DEN)
    Direct

    Thu Jan 5th 2023 Frontier Airlines · F9 699 Depart at 2:41 pm from St. Louis (STL) Fly for 2h 38m Arrive at 4:19 pm in Denver (DEN)

  • USD 69
    Frontier Airlines
    2:41pm - 4:19pm
    Sun Jan 8th
    2h 38m
    St. Louis (STL) → Denver (DEN)
    Direct

    Sun Jan 8th 2023 Frontier Airlines · F9 699 Depart at 2:41 pm from St. Louis (STL) Fly for 2h 38m Arrive at 4:19 pm in Denver (DEN)

  • USD 69
    Frontier Airlines
    2:11pm - 3:49pm
    Fri Jan 6th
    2h 38m
    St. Louis (STL) → Denver (DEN)
    Direct

    Fri Jan 6th 2023 Frontier Airlines · F9 699 Depart at 2:11 pm from St. Louis (STL) Fly for 2h 38m Arrive at 3:49 pm in Denver (DEN)

  • USD 74
    Frontier Airlines
    12:05pm - 7:15pm
    Tue Jan 10th
    8h 10m
    St. Louis (STL) → Denver (DEN)
    1 Stop

    Tue Jan 10th 2023 Frontier Airlines · F9 2095 Depart at 12:05 pm from St. Louis (STL) Fly for 3h 49m Arrive at 1:54 pm in Las Vegas (LAS)

    Layover in Las Vegas for 2h 21m

    Tue Jan 10th 2023 Frontier Airlines · F9 780 Depart at 4:15 pm from Las Vegas (LAS) Fly for 2h 0m Arrive at 7:15 pm in Denver (DEN)

  • USD 78
    Frontier Airlines
    1:07pm - 9:27pm
    Wed Jan 4th
    9h 20m
    St. Louis (STL) → Denver (DEN)
    1 Stop

    Wed Jan 4th 2023 Frontier Airlines · F9 2097 Depart at 1:07 pm from St. Louis (STL) Fly for 3h 53m Arrive at 3:00 pm in Las Vegas (LAS)

    Layover in Las Vegas for 3h 30m

    Wed Jan 4th 2023 Frontier Airlines · F9 776 Depart at 6:30 pm from Las Vegas (LAS) Fly for 1h 57m Arrive at 9:27 pm in Denver (DEN)

  • USD 86
    Frontier Airlines
    1:07pm - 7:00pm
    Wed Jan 4th
    6h 53m
    St. Louis (STL) → Denver (DEN)
    1 Stop

    Wed Jan 4th 2023 Frontier Airlines · F9 2097 Depart at 1:07 pm from St. Louis (STL) Fly for 3h 53m Arrive at 3:00 pm in Las Vegas (LAS)

    Layover in Las Vegas for 1h 0m

    Wed Jan 4th 2023 Frontier Airlines · F9 770 Depart at 4:00 pm from Las Vegas (LAS) Fly for 2h 0m Arrive at 7:00 pm in Denver (DEN)

  • USD 89
    Frontier Airlines
    10:19pm - 11:52pm
    Sat Dec 31st
    2h 33m
    St. Louis (STL) → Denver (DEN)
    Direct

    Sat Dec 31st 2022 Frontier Airlines · F9 701 Depart at 10:19 pm from St. Louis (STL) Fly for 2h 33m Arrive at 11:52 pm in Denver (DEN)

  • USD 90
    United Airlines
    1:38pm - 3:00pm
    Thu Jan 19th
    2h 22m
    St. Louis (STL) → Denver (DEN)
    Direct

    Thu Jan 19th 2023 United Airlines · UA 2363 Depart at 1:38 pm from St. Louis (STL) Fly for 2h 22m Arrive at 3:00 pm in Denver (DEN)

  • USD 90
    United Airlines
    1:38pm - 3:00pm
    Sun Jan 22nd
    2h 22m
    St. Louis (STL) → Denver (DEN)
    Direct

    Sun Jan 22nd 2023 United Airlines · UA 2363 Depart at 1:38 pm from St. Louis (STL) Fly for 2h 22m Arrive at 3:00 pm in Denver (DEN)

  • USD 90
    United Airlines
    1:38pm - 3:00pm
    Tue Jan 24th
    2h 22m
    St. Louis (STL) → Denver (DEN)
    Direct

    Tue Jan 24th 2023 United Airlines · UA 2363 Depart at 1:38 pm from St. Louis (STL) Fly for 2h 22m Arrive at 3:00 pm in Denver (DEN)

  • USD 90
    United Airlines
    4:36pm - 6:10pm
    Sun Jan 22nd
    2h 34m
    St. Louis (STL) → Denver (DEN)
    Direct

    Sun Jan 22nd 2023 United Airlines · UA 5221 Depart at 4:36 pm from St. Louis (STL) Fly for 2h 34m Arrive at 6:10 pm in Denver (DEN)

  • USD 90
    United Airlines
    8:39am - 10:13am
    Tue Jan 24th
    2h 34m
    St. Louis (STL) → Denver (DEN)
    Direct

    Tue Jan 24th 2023 United Airlines · UA 690 Depart at 8:39 am from St. Louis (STL) Fly for 2h 34m Arrive at 10:13 am in Denver (DEN)

  • USD 91
    United Airlines
    1:38pm - 3:00pm
    Tue Jan 17th
    2h 22m
    St. Louis (STL) → Denver (DEN)
    Direct

    Tue Jan 17th 2023 United Airlines · UA 2363 Depart at 1:38 pm from St. Louis (STL) Fly for 2h 22m Arrive at 3:00 pm in Denver (DEN)

  • USD 91
    United Airlines
    1:38pm - 3:00pm
    Mon Jan 23rd
    2h 22m
    St. Louis (STL) → Denver (DEN)
    Direct

    Mon Jan 23rd 2023 United Airlines · UA 2363 Depart at 1:38 pm from St. Louis (STL) Fly for 2h 22m Arrive at 3:00 pm in Denver (DEN)

  • USD 91
    United Airlines
    1:38pm - 3:00pm
    Wed Jan 18th
    2h 22m
    St. Louis (STL) → Denver (DEN)
    Direct

    Wed Jan 18th 2023 United Airlines · UA 2363 Depart at 1:38 pm from St. Louis (STL) Fly for 2h 22m Arrive at 3:00 pm in Denver (DEN)

  • USD 91
    United Airlines
    1:38pm - 3:00pm
    Sat Jan 21st
    2h 22m
    St. Louis (STL) → Denver (DEN)
    Direct

    Sat Jan 21st 2023 United Airlines · UA 2363 Depart at 1:38 pm from St. Louis (STL) Fly for 2h 22m Arrive at 3:00 pm in Denver (DEN)

  • USD 91
    United Airlines
    8:39am - 10:13am
    Tue Jan 17th
    2h 34m
    St. Louis (STL) → Denver (DEN)
    Direct

    Tue Jan 17th 2023 United Airlines · UA 690 Depart at 8:39 am from St. Louis (STL) Fly for 2h 34m Arrive at 10:13 am in Denver (DEN)

  • USD 91
    United Airlines
    8:39am - 10:13am
    Mon Jan 16th
    2h 34m
    St. Louis (STL) → Denver (DEN)
    Direct

    Mon Jan 16th 2023 United Airlines · UA 690 Depart at 8:39 am from St. Louis (STL) Fly for 2h 34m Arrive at 10:13 am in Denver (DEN)

  • USD 91
    United Airlines
    8:39am - 10:13am
    Wed Jan 18th
    2h 34m
    St. Louis (STL) → Denver (DEN)
    Direct

    Wed Jan 18th 2023 United Airlines · UA 690 Depart at 8:39 am from St. Louis (STL) Fly for 2h 34m Arrive at 10:13 am in Denver (DEN)

  • USD 91
    United Airlines
    8:39am - 10:13am
    Mon Jan 23rd
    2h 34m
    St. Louis (STL) → Denver (DEN)
    Direct

    Mon Jan 23rd 2023 United Airlines · UA 690 Depart at 8:39 am from St. Louis (STL) Fly for 2h 34m Arrive at 10:13 am in Denver (DEN)

  • USD 91
    United Airlines
    4:32pm - 6:10pm
    Sat Jan 21st
    2h 38m
    St. Louis (STL) → Denver (DEN)
    Direct

    Sat Jan 21st 2023 United Airlines · UA 5221 Depart at 4:32 pm from St. Louis (STL) Fly for 2h 38m Arrive at 6:10 pm in Denver (DEN)

  • USD 91
    United Airlines
    4:25pm - 6:03pm
    Mon Jan 16th
    2h 38m
    St. Louis (STL) → Denver (DEN)
    Direct

    Mon Jan 16th 2023 United Airlines · UA 5221 Depart at 4:25 pm from St. Louis (STL) Fly for 2h 38m Arrive at 6:03 pm in Denver (DEN)

  • USD 91
    United Airlines
    4:25pm - 6:03pm
    Mon Jan 23rd
    2h 38m
    St. Louis (STL) → Denver (DEN)
    Direct

    Mon Jan 23rd 2023 United Airlines · UA 5221 Depart at 4:25 pm from St. Louis (STL) Fly for 2h 38m Arrive at 6:03 pm in Denver (DEN)

  • USD 92
    Frontier Airlines
    2:11pm - 3:49pm
    Wed Jan 4th
    2h 38m
    St. Louis (STL) → Denver (DEN)
    Direct

    Wed Jan 4th 2023 Frontier Airlines · F9 699 Depart at 2:11 pm from St. Louis (STL) Fly for 2h 38m Arrive at 3:49 pm in Denver (DEN)

  • USD 102
    United Airlines
    10:30am - 2:33pm
    Tue Jan 24th
    5h 3m
    St. Louis (STL) → Denver (DEN)
    1 Stop

    Tue Jan 24th 2023 United Airlines · UA 4381 Depart at 10:30 am from St. Louis (STL) Fly for 1h 30m Arrive at 12:00 pm in Chicago (ORD)

    Layover in Chicago for 0h 45m

    Tue Jan 24th 2023 United Airlines · UA 2160 Depart at 12:45 pm from Chicago (ORD) Fly for 2h 48m Arrive at 2:33 pm in Denver (DEN)

  • USD 102
    United Airlines
    5:18pm - 10:15pm
    Mon Jan 23rd
    5h 57m
    St. Louis (STL) → Denver (DEN)
    1 Stop

    Mon Jan 23rd 2023 United Airlines · UA 5218 Depart at 5:18 pm from St. Louis (STL) Fly for 1h 31m Arrive at 6:49 pm in Chicago (ORD)

    Layover in Chicago for 1h 33m

    Mon Jan 23rd 2023 United Airlines · UA 2485 Depart at 8:22 pm from Chicago (ORD) Fly for 2h 53m Arrive at 10:15 pm in Denver (DEN)

  • USD 103
    Delta Air Lines
    3:50pm - 8:14pm
    Tue Jan 24th
    5h 24m
    St. Louis (STL) → Denver (DEN)
    1 Stop

    Tue Jan 24th 2023 Delta Air Lines · DL 4965 Depart at 3:50 pm from St. Louis (STL) Fly for 1h 35m Arrive at 5:25 pm in Minneapolis (MSP)

    Layover in Minneapolis for 1h 20m

    Tue Jan 24th 2023 Delta Air Lines · DL 1145 Depart at 6:45 pm from Minneapolis (MSP) Fly for 2h 29m Arrive at 8:14 pm in Denver (DEN)

  • USD 103
    Delta Air Lines
    2:18pm - 7:14pm
    Tue Jan 24th
    5h 56m
    St. Louis (STL) → Denver (DEN)
    1 Stop

    Tue Jan 24th 2023 Delta Air Lines · DL 1309 Depart at 2:18 pm from St. Louis (STL) Fly for 3h 27m Arrive at 4:45 pm in Salt Lake City (SLC)

    Layover in Salt Lake City for 1h 0m

    Tue Jan 24th 2023 Delta Air Lines · DL 1233 Depart at 5:45 pm from Salt Lake City (SLC) Fly for 1h 29m Arrive at 7:14 pm in Denver (DEN)

  • USD 110
    United Airlines
    1:38pm - 3:00pm
    Wed Jan 11th
    2h 22m
    St. Louis (STL) → Denver (DEN)
    Direct

    Wed Jan 11th 2023 United Airlines · UA 2363 Depart at 1:38 pm from St. Louis (STL) Fly for 2h 22m Arrive at 3:00 pm in Denver (DEN)

  • USD 110
    United Airlines
    1:38pm - 3:00pm
    Mon Jan 9th
    2h 22m
    St. Louis (STL) → Denver (DEN)
    Direct

    Mon Jan 9th 2023 United Airlines · UA 2363 Depart at 1:38 pm from St. Louis (STL) Fly for 2h 22m Arrive at 3:00 pm in Denver (DEN)

  • USD 110
    United Airlines
    8:39am - 10:13am
    Wed Jan 11th
    2h 34m
    St. Louis (STL) → Denver (DEN)
    Direct

    Wed Jan 11th 2023 United Airlines · UA 690 Depart at 8:39 am from St. Louis (STL) Fly for 2h 34m Arrive at 10:13 am in Denver (DEN)

  • USD 110
    United Airlines
    1:38pm - 3:00pm
    Tue Jan 10th
    2h 22m
    St. Louis (STL) → Denver (DEN)
    Direct

    Tue Jan 10th 2023 United Airlines · UA 2363 Depart at 1:38 pm from St. Louis (STL) Fly for 2h 22m Arrive at 3:00 pm in Denver (DEN)

  • USD 110
    United Airlines
    8:39am - 10:13am
    Mon Jan 9th
    2h 34m
    St. Louis (STL) → Denver (DEN)
    Direct

    Mon Jan 9th 2023 United Airlines · UA 690 Depart at 8:39 am from St. Louis (STL) Fly for 2h 34m Arrive at 10:13 am in Denver (DEN)

  • USD 110
    United Airlines
    8:39am - 10:13am
    Tue Jan 10th
    2h 34m
    St. Louis (STL) → Denver (DEN)
    Direct

    Tue Jan 10th 2023 United Airlines · UA 690 Depart at 8:39 am from St. Louis (STL) Fly for 2h 34m Arrive at 10:13 am in Denver (DEN)

  • USD 110
    United Airlines
    4:25pm - 6:03pm
    Tue Jan 10th
    2h 38m
    St. Louis (STL) → Denver (DEN)
    Direct

    Tue Jan 10th 2023 United Airlines · UA 5221 Depart at 4:25 pm from St. Louis (STL) Fly for 2h 38m Arrive at 6:03 pm in Denver (DEN)

@sarahbb1
Sarah Belizaire
@sarahbb1

Have flexible travel plans or looking for alternative routes given the chaos? Check out all the connection possibilities via a super helpful site created by @ismaelyws flightlist.io thanks to @andy_travels for the recommendation #travel #flights

@eyupitsjohn
John Ford
@eyupitsjohn

There seem to be lots of sites launching at the moment that promise to find you cheap one way flights but not many have the professional finish of Flightlist by @ismaelyws #travel #flights

@andy_travels
Andy Travels
@andy_travels

@ismaelyws Just tried out Flightlist for the first time. Really nice idea, well made, and just what I need at the moment 👍

@travelwitbender
Travel With Bender
@travelwitbender

Did you spot my recent article about how to score cheap one way flights? ✈️ FlightList is my new secret tool for discovering cheap routes, within a departure date range. Plus you can also search by country/region for departures & destinations. Powerful! 💪

Explore Flight Options

Cheap Flight Search Tips

Tips to help you find the cheapest flights from St. Louis to Denver (STL to DEN).

  • Book 45-90 days before your departure date.
  • Fly during weekdays (Monday-Thursday).
  • Airfare Sales: Airlines sometimes offer huge discounts and since we take a bottom-up approach these flights will appear first in the results, so check back regularly because they don't usually last long.

Why I Built FlightList

❝As someone who works remotely & travels frequently, I always book one way flights and I'm flexible on my departure dates. I look for the best deals. Most sites require you to enter a specific departure date and clutter the page with uneccessary options, images and ads. I want something simple and minimal which allows me to search by departure date range & display a list of flights with the ability to filter according to my needs. So, I built FlightList to solve my own problem & help other travelers who may have the same frustration. It's how I imagine a flight booking site should be.❞

- Hans Desjarlais, Founder & Creator Hans Desjarlais