$43+ Cheap flights from St. Louis (STL) to Colorado
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 12/2. Fares are subject to change and may not be available on all flights or dates of travel.
STL — DEN
Nov 24 — Dec 11
Round-trip
1 adult, Economy
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Find cheap flights from St. Louis to Colorado 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
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Cheapest flights from St. Louis to ColoradoExplore the most affordable flight options available from St. Louis to Colorado. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 25, 2026.
Explore the most affordable flight options available from St. Louis to Colorado. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 25, 2026.
This FlightHub deal was found by Cheapflights users on 10/24. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/27:58 pm -
Nonstop2h 31m
Mon 12/76:41 am -
1 stop16h 31m
Deal found 10/24![Frontier logo]()
$139
This Mytrip deal was found by Cheapflights users on 10/24. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/412:02 pm -
2 stops10h 48m
Mon 12/77:47 am -
Nonstop2h 10m
Deal found 10/24![Frontier logo]()
$140
This Kiwi.com deal was found by Cheapflights users on 10/23. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/1112:02 pm -
2 stops10h 53m
Sat 12/127:47 am -
Nonstop2h 10m
Deal found 10/23![Frontier logo]()
$141
This Super.com deal was found by Cheapflights users on 10/24. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/97:59 pm -
Nonstop2h 31m
Wed 11/1112:21 pm -
Nonstop2h 02m
Deal found 10/24![Frontier logo]()
$143
This Cheapflightsfares deal was found by Cheapflights users on 10/23. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/265:15 pm -
1 stop17h 28m
Wed 12/28:00 am -
Nonstop2h 06m
Deal found 10/23![Frontier logo]()
$144
This Mytrip deal was found by Cheapflights users on 10/22. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/233:04 pm -
Nonstop2h 33m
Fri 11/277:55 am -
Nonstop2h 08m
Deal found 10/22![Frontier logo]()
$145
This Cheapflightsfares deal was found by Cheapflights users on 10/22. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/114:18 pm -
Nonstop2h 30m
Sat 11/144:09 pm -
Nonstop2h 05m
Deal found 10/22![Frontier logo]()
$151
This Kiwi.com deal was found by Cheapflights users on 10/20. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/114:18 pm -
Nonstop2h 30m
Tue 11/1710:40 am -
2 stops30h 02m
Deal found 10/20![Frontier logo]()
$152
This Southwest deal was found by Cheapflights users on 10/22. 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 12/45:00 pm -
1 stop6h 00m
Sat 12/512:40 pm -
1 stop6h 20m
Deal found 10/22![Southwest logo]()
$290
This American Airlines deal was found by Cheapflights users on 10/22. 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 12/307:14 pm -
1 stop5h 26m
Wed 1/63:11 pm -
1 stop7h 21m
Deal found 10/22![American Airlines logo]()
$304
This Southwest deal was found by Cheapflights users on 10/23. 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 12/45:15 pm -
1 stop5h 30m
Sun 12/65:25 am -
1 stop6h 20m
Deal found 10/23![Southwest logo]()
$311
This Southwest deal was found by Cheapflights users on 10/23. 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 12/306:35 pm -
1 stop4h 25m
Thu 12/311:40 pm -
1 stop4h 50m
Deal found 10/23![Southwest logo]()
$338
Best flights from St. Louis to ColoradoDiscover carefully curated flight deals from St. Louis to Colorado that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 25, 2026.
Discover carefully curated flight deals from St. Louis to Colorado that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 25, 2026.
This Southwest deal was found by Cheapflights users on 10/25. 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 12/45:15 pm -
Nonstop2h 30m
Tue 12/88:10 am -
Nonstop2h 00m
Deal found 10/25![Southwest logo]()
$177
This United Airlines deal was found by Cheapflights users on 10/20. 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 1/153:10 pm -
Nonstop2h 35m
Tue 1/195:30 pm -
Nonstop2h 08m
Deal found 10/20![United Airlines logo]()
$279
This Southwest deal was found by Cheapflights users on 10/23. 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 12/248:20 pm -
Nonstop2h 25m
Wed 12/307:55 am -
Nonstop2h 00m
Deal found 10/23![Southwest logo]()
$177
This Delta deal was found by Cheapflights users on 10/24. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/36:00 am -
2 stops12h 23m
Wed 12/96:05 pm -
2 stops13h 56m
Deal found 10/24![Delta logo]()
$364
This American Airlines deal was found by Cheapflights users on 10/24. 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 12/25:50 am -
1 stop8h 03m
Wed 12/96:00 am -
1 stop6h 51m
Deal found 10/24![American Airlines logo]()
$369
This Southwest deal was found by Cheapflights users on 10/22. 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 11/129:45 pm -
Nonstop2h 30m
Sun 11/156:30 am -
Nonstop2h 05m
Deal found 10/22![Southwest logo]()
$191
This Southwest deal was found by Cheapflights users on 10/24. 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.
Sat 12/510:35 am -
2 stops6h 05m
Mon 12/76:25 am -
1 stop5h 55m
Deal found 10/24![Southwest logo]()
$202
This Southwest deal was found by Cheapflights users on 10/23. 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 1/206:40 am -
1 stop5h 35m
Sun 1/249:05 am -
1 stop6h 25m
Deal found 10/23![Southwest logo]()
$211
This United Airlines deal was found by Cheapflights users on 10/21. 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 2/238:50 am -
1 stop4h 52m
Sat 2/271:00 pm -
2 stops9h 19m
Deal found 10/21![United Airlines logo]()
$297
This United Airlines deal was found by Cheapflights users on 10/20. 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 1/223:10 pm -
1 stop6h 23m
Mon 1/251:30 pm -
1 stop6h 08m
Deal found 10/20![United Airlines logo]()
$320
This Delta deal was found by Cheapflights users on 10/24. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/189:45 am -
2 stops8h 43m
Tue 11/246:00 am -
1 stop6h 23m
Deal found 10/24![Delta logo]()
$400
This Southwest deal was found by Cheapflights users on 10/22. 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 12/45:00 pm -
1 stop6h 00m
Sat 12/512:40 pm -
1 stop6h 20m
Deal found 10/22![Southwest logo]()
$290
This United Airlines deal was found by Cheapflights users on 10/24. 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 11/204:39 pm -
1 stop4h 57m
Sun 11/221:35 pm -
1 stop6h 26m
Deal found 10/24![United Airlines logo]()
$358
This Delta deal was found by Cheapflights users on 10/21. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/55:00 pm -
1 stop6h 22m
Thu 11/121:31 pm -
1 stop7h 11m
Deal found 10/21![Delta logo]()
$424
This United Airlines deal was found by Cheapflights users on 10/25. 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 12/38:40 am -
Nonstop2h 31m
Sun 12/63:50 pm -
1 stop6h 09m
Deal found 10/25![United Airlines logo]()
$371
This Southwest deal was found by Cheapflights users on 10/20. 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 1/158:30 am -
1 stop6h 00m
Tue 1/196:25 am -
Nonstop2h 00m
Deal found 10/20![Southwest logo]()
$318
This Delta deal was found by Cheapflights users on 10/23. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/37:45 am -
1 stop5h 45m
Tue 11/171:16 pm -
1 stop7h 02m
Deal found 10/23![Delta logo]()
$439
This United Airlines deal was found by Cheapflights users on 10/24. 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 12/28:40 am -
1 stop4h 47m
Wed 12/91:29 pm -
2 stops8h 30m
Deal found 10/24![United Airlines logo]()
$374
This American Airlines deal was found by Cheapflights users on 10/20. 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 2/47:01 am -
1 stop6h 06m
Mon 2/812:49 pm -
1 stop4h 41m
Deal found 10/20![American Airlines logo]()
$566
This Southwest deal was found by Cheapflights users on 10/22. 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 12/306:35 pm -
1 stop4h 25m
Wed 1/66:40 am -
2 stops7h 20m
Deal found 10/22![Southwest logo]()
$344
This United Airlines deal was found by Cheapflights users on 10/20. 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 11/101:08 pm -
2 stops8h 24m
Wed 11/111:27 pm -
1 stop6h 32m
Deal found 10/20![United Airlines logo]()
$388
This United Airlines deal was found by Cheapflights users on 10/23. 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 11/121:40 pm -
Nonstop2h 29m
Sun 11/156:00 am -
1 stop5h 10m
Deal found 10/23![United Airlines logo]()
$389
This Southwest deal was found by Cheapflights users on 10/21. 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.
Mon 12/289:50 pm -
Nonstop2h 30m
Tue 1/54:30 pm -
1 stop5h 40m
Deal found 10/21![Southwest logo]()
$354
This Delta deal was found by Cheapflights users on 10/22. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/96:00 am -
1 stop6h 43m
Wed 11/112:22 pm -
1 stop6h 20m
Deal found 10/22![Delta logo]()
$545
This Southwest deal was found by Cheapflights users on 10/24. 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.
Sat 11/145:50 am -
2 stops7h 20m
Fri 11/201:20 pm -
2 stops5h 30m
Deal found 10/24![Southwest logo]()
$357
This United Airlines deal was found by Cheapflights users on 10/23. 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.
Sat 11/76:00 am -
2 stops7h 39m
Wed 11/117:10 am -
1 stop4h 28m
Deal found 10/23![United Airlines logo]()
$394
This United Airlines deal was found by Cheapflights users on 10/24. 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 1/510:45 am -
1 stop8h 47m
Thu 1/71:41 pm -
1 stop5h 57m
Deal found 10/24![United Airlines logo]()
$401
This Southwest deal was found by Cheapflights users on 10/23. 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 12/304:50 pm -
2 stops6h 30m
Thu 12/311:40 pm -
1 stop4h 50m
Deal found 10/23![Southwest logo]()
$388
This United Airlines deal was found by Cheapflights users on 10/23. 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 2/186:15 am -
2 stops7h 19m
Tue 2/231:36 pm -
2 stops6h 47m
Deal found 10/23![United Airlines logo]()
$402
This Southwest deal was found by Cheapflights users on 10/20. 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 11/64:00 pm -
2 stops6h 50m
Mon 11/912:40 pm -
1 stop11h 15m
Deal found 10/20![Southwest logo]()
$394
Last-minute flights from St. Louis to ColoradoDiscover last-minute flight deals from St. Louis to Colorado. Data last updated October 25, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Colorado. Data last updated October 25, 2026 and is based on user searches.
This Delta deal was found by Cheapflights users on 10/21. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/45:00 pm -
1 stop6h 22m
Mon 11/96:08 pm -
1 stop5h 32m
Deal found 10/21![Delta logo]()
$383
This Cheapflightsfares deal was found by Cheapflights users on 10/24. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/74:26 pm -
1 stop16h 47m
Sat 11/144:09 pm -
Nonstop2h 05m
Deal found 10/24![Frontier logo]()
$158
This Super.com deal was found by Cheapflights users on 10/24. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/97:59 pm -
Nonstop2h 31m
Wed 11/1112:21 pm -
Nonstop2h 02m
Deal found 10/24![Frontier logo]()
$142
This Southwest deal was found by Cheapflights users on 10/23. 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.
Mon 11/95:10 am -
1 stop7h 25m
Mon 11/161:40 pm -
1 stop4h 50m
Deal found 10/23![Southwest logo]()
$353
This United Airlines deal was found by Cheapflights users on 10/20. 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 11/104:39 pm -
1 stop4h 53m
Wed 11/117:00 am -
1 stop4h 38m
Deal found 10/20![United Airlines logo]()
$383
This Cheapflightsfares deal was found by Cheapflights users on 10/22. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/114:18 pm -
Nonstop2h 30m
Sat 11/144:09 pm -
Nonstop2h 05m
Deal found 10/22![Frontier logo]()
$151
This Kiwi.com deal was found by Cheapflights users on 10/20. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/114:18 pm -
Nonstop2h 30m
Tue 11/1710:40 am -
2 stops30h 02m
Deal found 10/20![Frontier logo]()
$152
This Southwest deal was found by Cheapflights users on 10/25. 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.
Mon 11/165:00 pm -
1 stop6h 00m
Mon 11/235:00 am -
2 stops7h 30m
Deal found 10/25![Southwest logo]()
$379
This Cheapflightsfares deal was found by Cheapflights users on 10/21. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/184:18 pm -
Nonstop2h 30m
Wed 11/251:03 pm -
1 stop26h 17m
Deal found 10/21![Frontier logo]()
$149
This United Airlines deal was found by Cheapflights users on 10/24. 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 11/204:39 pm -
1 stop4h 57m
Sun 11/221:35 pm -
1 stop6h 26m
Deal found 10/24![United Airlines logo]()
$358
This Mytrip deal was found by Cheapflights users on 10/22. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/233:04 pm -
Nonstop2h 33m
Fri 11/277:55 am -
Nonstop2h 08m
Deal found 10/22![Frontier logo]()
$145
This Cheapflightsfares deal was found by Cheapflights users on 10/23. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/265:15 pm -
1 stop17h 28m
Wed 12/28:00 am -
Nonstop2h 06m
Deal found 10/23![Frontier logo]()
$144
One-way flights from St. Louis to ColoradoSearch for one-way flight options from St. Louis to Colorado. Find affordable one-way fares based on user searches. Data last updated October 25, 2026.
Search for one-way flight options from St. Louis to Colorado. Find affordable one-way fares based on user searches. Data last updated October 25, 2026.
This Super.com deal was found by Cheapflights users on 10/25. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/27:58 pm -
Nonstop2h 31m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/25![Frontier logo]()
$43
This Cheapflightsfares deal was found by Cheapflights users on 10/24. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 1/227:02 pm -
Nonstop2h 31m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/24![Frontier logo]()
$44
This Kiwi.com deal was found by Cheapflights users on 10/20. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/114:18 pm -
Nonstop2h 30m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/20![Frontier logo]()
$49
This Super.com deal was found by Cheapflights users on 10/20. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/137:59 pm -
Nonstop2h 31m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/20![Frontier logo]()
$50
This Super.com deal was found by Cheapflights users on 10/20. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/47:58 pm -
Nonstop2h 31m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/20![Frontier logo]()
$51
This Mytrip deal was found by Cheapflights users on 10/21. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/147:59 pm -
Nonstop2h 31m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/21![Frontier logo]()
$52
This Kiwi.com deal was found by Cheapflights users on 10/21. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/96:34 pm -
1 stop27h 58m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/21![Frontier logo]()
$72
This Super.com deal was found by Cheapflights users on 10/22. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/236:35 pm -
1 stop13h 01m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/22![Frontier logo]()
$73
This American Airlines deal was found by Cheapflights users on 10/23. 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 12/308:26 am -
1 stop7h 30m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/23![American Airlines logo]()
$133
This American Airlines deal was found by Cheapflights users on 10/21. 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 12/307:14 pm -
1 stop5h 26m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/21![American Airlines logo]()
$172
This United Airlines deal was found by Cheapflights users on 10/23. 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 2/262:45 pm -
1 stop7h 11m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/23![United Airlines logo]()
$180
This United Airlines deal was found by Cheapflights users on 10/25. 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 11/38:50 am -
1 stop4h 36m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/25![United Airlines logo]()
$196
Find flight deals from St. Louis to Colorado
Keep the following information in mind while searching for St. Louis to Colorado flight deals. Data was last updated October 25, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $139 (FlightHub) |
One-way from | $43 (Super.com) |
Popular in | June |
Cheapest in | January |
Average price | $287 |
Good round-trip deal | $304 or less |
Good one-way deal | $207 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from St. Louis to Colorado 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 October 25, 2026.
Use the filters below to find and compare flights from St. Louis to Colorado that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
Quickest round-trip
St. LouisDenver
STL Lambert-St Louis - DEN Denver Intl
STLDEN
Lambert-St Louis
Sun 12/6
7:25 pm-8:50 pm
Nonstop2h 25m
Denver Intl
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$96
St. LouisDenver
STL Lambert-St Louis - DEN Denver Intl
STLDEN
Lambert-St Louis
Tue 11/10
8:20 pm-9:45 pm
Nonstop2h 25m
Denver Intl
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$96
St. LouisDenver
STL Lambert-St Louis - DEN Denver Intl
STLDEN
Lambert-St Louis
Thu 11/26
5:30 am-6:55 am
Nonstop2h 25m
Denver Intl
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$96
St. LouisDenver
STL Lambert-St Louis - DEN Denver Intl
STLDEN
Lambert-St Louis
Thu 12/10
6:30 am-7:55 am
Nonstop2h 25m
Denver Intl
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$96
St. LouisDenver
STL Lambert-St Louis - DEN Denver Intl
STLDEN
Lambert-St Louis
Thu 11/12
9:45 pm-11:15 pm
Nonstop2h 30m
Denver Intl
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$96
St. LouisDenver
STL Lambert-St Louis - DEN Denver Intl
STLDEN
Lambert-St Louis
Thu 11/26
7:30 am-12:45 pm
1 stop6h 15m
Denver Intl
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$99
St. LouisDenver
STL Lambert-St Louis - DEN Denver Intl
STLDEN
Lambert-St Louis
Fri 1/22
2:30 pm-7:15 pm
1 stop5h 45m
Denver Intl
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$99
St. LouisDenver
STL Lambert-St Louis - DEN Denver Intl
STLDEN
Lambert-St Louis
Sat 11/14
10:35 am-3:40 pm
2 stops6h 05m
Denver Intl
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$111
St. LouisDenver
STL Lambert-St Louis - DEN Denver Intl
STLDEN
Lambert-St Louis
Tue 11/10
5:48 pm-11:15 pm
1 stop6h 27m
Denver Intl
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$141
St. LouisColorado Springs
STL Lambert-St Louis - COS Colorado Springs
STLCOS
Lambert-St Louis
Wed 12/30
7:14 pm-11:40 pm
1 stop5h 26m
Colorado Springs
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$172
Showing 1-10 of 54 resultsSorted by cheapest first
Best time to book a flight from St. Louis to Colorado
Have a flexible travel schedule? Discover the best time to fly to Colorado from St. Louis with our price prediction graph.
STL-DEN
STL-COS
STL-DRO
STL-HDN
STL-GJT
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 St. Louis to Colorado
STL-USCO
STL-DEN
STL-COS
STL-DRO
STL-HDN
What is the cheapest month to book a flight from St. Louis to Colorado?
Currently, January is the cheapest month in which you can book a flight from St. Louis to Colorado (average of $240). Flying from St. Louis to Colorado in July is currently the most expensive (average of $360). 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.
What is the cheapest time of day to fly from STL to CO?
Find hourly flight availability from St. Louis to Colorado. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated October 25, 2026.
One of the essential ways to save on airfare from St. Louis to Colorado is to remain as flexible as possible. Flights that are in the morning tend to be the most expensive. A flight in the evening could potentially save you up to 46% on airfare.
How much does it cost to fly round-trip from St. Louis to Colorado?
Airfare is below average for this route at the moment.
St. Louis to Colorado flights typically cost between $190 and $368 in December.The cheapest round-trip price found within the last 5 days was $139 on Frontier (Dec 2-Dec 7).
How far ahead should I book a flight from St. Louis to Colorado?
The best time to book flights from St. Louis to Colorado is 34 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.
What is the cheapest day to fly from St. Louis to Colorado?
Use this chart to determine the cheapest time to fly round-trip from St. Louis to Colorado. Price data was last updated on October 17, 2026.
Travelers seeking maximum savings on their St. Louis to Colorado flight should consider departing on Saturday evenings when fares are most often at their lowest. Sunday at noon flights should be avoided if possible as fares are typically the most expensive at this time.
Reviews of airlines servicing Colorado
Get insights into the airlines that provide service to Colorado. 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 Colorado. Reviews last updated October 25, 2026.
Peruse reviews from past customers who have flown with Southwest,United Airlines, andAmerican Airlines from St. Louis to Colorado to help guide your decision. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Entertainment
7.4
Food
7.0
Crew
8.6
Overall
7.9
Boarding
8.1
Comfort
8.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Entertainment
7.4
Food
7.0
Crew
8.6
Overall
7.9
Boarding
8.1
Comfort
8.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Entertainment
7.4
Food
7.0
Crew
8.6
Overall
7.9
Boarding
8.1
Comfort
8.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Entertainment
7.4
Food
7.0
Crew
8.6
Overall
7.9
Boarding
8.1
Comfort
8.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Entertainment
7.4
Food
7.0
Crew
8.6
Overall
7.9
Boarding
8.1
Comfort
8.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Related info for your journey
Find useful and relevant information for your journey from St. Louis to Colorado. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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Alternative routes for St. Louis to Colorado
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Complete your trip
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St. Louis and Colorado flights
Browse other St. Louis and Colorado flight options. Last updated on October 25, 2026.
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St. Louis to Colorado flights
Consider these flights traveling from St. Louis to Colorado.
Top 4 airlines flying from St. Louis to Colorado
Discover the top 4 airlines that operate flights from St. Louis to Colorado. 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 October 25, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$58 | Average$191 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$185 | Average$395 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$195 | Average$369 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$276 | Average$490 | FlexibilityNo cancel fee | On-time71% |