$139+ Cheap flights from Dulles Intl (IAD) 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 12/8. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — DEN
Dec 10 — Dec 171
Round-trip
1 adult, Economy
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Find cheap flights from Dulles Intl to Colorado with Cheapflights
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Cheapest flights from Dulles Intl to ColoradoExplore the most affordable flight options available from Dulles Intl to Colorado. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 10, 2026.
Explore the most affordable flight options available from Dulles Intl to Colorado. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 10, 2026.
This Kiwi.com deal was found by Cheapflights users on 11/5. 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.
Tue 11/1711:16 am -
1 stop10h 44m
Tue 11/2410:51 am -
1 stop9h 11m
Deal found 11/5![Frontier logo]()
$299
This Expedia deal was found by Cheapflights users on 11/5. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/228:51 pm -
1 stop17h 27m
Mon 12/286:00 am -
1 stop7h 13m
Deal found 11/5![Frontier logo]()
$300
This Kiwi.com deal was found by Cheapflights users on 11/6. 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.
Sat 11/2110:47 pm -
1 stop9h 49m
Fri 11/2710:25 am -
1 stop8h 36m
Deal found 11/6![Frontier logo]()
$301
This Kiwi.com deal was found by Cheapflights users on 11/9. 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.
Tue 12/112:06 pm -
2 stops11h 44m
Thu 12/1010:26 am -
1 stop7h 44m
Deal found 11/9![Frontier logo]()
$302
This Cheapflightsfares deal was found by Cheapflights users on 11/5. 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 11/271:09 pm -
1 stop13h 45m
Mon 11/303:52 pm -
1 stop16h 13m
Deal found 11/5![Frontier logo]()
$303
This Kiwi.com deal was found by Cheapflights users on 11/10. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/2210:59 pm -
1 stop9h 30m
Wed 12/306:00 am -
1 stop7h 13m
Deal found 11/10![Frontier logo]()
$304
This Frontier deal was found by Cheapflights users on 11/9. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/311:18 am -
1 stop7h 47m
Sun 12/137:10 am -
1 stop11h 00m
Deal found 11/9![Frontier logo]()
$305
This Mytrip deal was found by Cheapflights users on 11/7. 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 12/46:42 pm -
2 stops19h 53m
Mon 12/76:59 pm -
2 stops17h 50m
Deal found 11/7![Frontier logo]()
$306
This Trip.com deal was found by Cheapflights users on 11/6. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/271:09 pm -
1 stop13h 45m
Thu 12/310:25 am -
2 stops29h 20m
Deal found 11/6![Frontier logo]()
$307
This Cheapflightsfares deal was found by Cheapflights users on 11/9. 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 11/219:35 pm -
1 stop27h 07m
Tue 11/2410:50 pm -
1 stop28h 20m
Deal found 11/9![Frontier logo]()
$308
This Mytrip deal was found by Cheapflights users on 11/8. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/910:35 pm -
2 stops16h 00m
Sat 12/128:40 pm -
2 stops16h 09m
Deal found 11/8![Frontier logo]()
$309
This Frontier deal was found by Cheapflights users on 11/9. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/3010:47 pm -
1 stop9h 49m
Mon 12/77:10 am -
1 stop11h 00m
Deal found 11/9![Frontier logo]()
$310
Best flights from Dulles Intl to ColoradoDiscover carefully curated flight deals from Dulles Intl to Colorado that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated November 10, 2026.
Discover carefully curated flight deals from Dulles Intl to Colorado that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated November 10, 2026.
This United Airlines deal was found by Cheapflights users on 11/8. 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.
Sat 3/62:25 pm -
Nonstop3h 58m
Thu 3/118:10 am -
Nonstop3h 24m
Deal found 11/8![United Airlines logo]()
$389
This Delta deal was found by Cheapflights users on 11/8. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/58:02 am -
1 stop6h 31m
Sat 12/126:05 pm -
2 stops13h 11m
Deal found 11/8![Delta logo]()
$398
This American Airlines deal was found by Cheapflights users on 11/10. 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.
Sat 1/307:00 am -
1 stop7h 07m
Sat 2/612:49 pm -
1 stop8h 06m
Deal found 11/10![American Airlines logo]()
$409
This United Airlines deal was found by Cheapflights users on 11/7. 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.
Sun 2/2110:39 pm -
Nonstop4h 06m
Sat 2/2710:20 am -
Nonstop3h 22m
Deal found 11/7![United Airlines logo]()
$389
This Delta deal was found by Cheapflights users on 11/9. 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.
Fri 1/296:00 am -
1 stop9h 24m
Wed 2/32:21 pm -
1 stop8h 25m
Deal found 11/9![Delta logo]()
$409
This United Airlines deal was found by Cheapflights users on 11/9. 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 3/232:25 pm -
Nonstop3h 58m
Mon 3/2911:50 pm -
Nonstop3h 18m
Deal found 11/9![United Airlines logo]()
$389
This Delta deal was found by Cheapflights users on 11/5. 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.
Fri 12/47:00 am -
1 stop7h 36m
Sat 12/51:11 pm -
2 stops8h 25m
Deal found 11/5![Delta logo]()
$414
This United Airlines deal was found by Cheapflights users on 11/8. 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.
Sat 12/58:20 am -
1 stop6h 17m
Sat 12/125:45 am -
1 stop5h 13m
Deal found 11/8![United Airlines logo]()
$393
This Delta deal was found by Cheapflights users on 11/5. 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 3/17:15 am -
1 stop7h 15m
Sat 3/612:10 pm -
1 stop9h 30m
Deal found 11/5![Delta logo]()
$415
This United Airlines deal was found by Cheapflights users on 11/8. 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.
Sun 12/68:20 am -
1 stop8h 22m
Sun 12/131:36 pm -
1 stop5h 48m
Deal found 11/8![United Airlines logo]()
$398
This American Airlines deal was found by Cheapflights users on 11/8. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 1/217:00 am -
1 stop8h 27m
Mon 1/252:47 pm -
1 stop6h 08m
Deal found 11/8![American Airlines logo]()
$559
This Delta deal was found by Cheapflights users on 11/9. 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.
Sat 1/96:00 am -
2 stops10h 15m
Sat 1/1612:07 pm -
1 stop8h 50m
Deal found 11/9![Delta logo]()
$434
This United Airlines deal was found by Cheapflights users on 11/9. 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 2/44:15 pm -
1 stop6h 24m
Mon 2/81:34 pm -
1 stop7h 52m
Deal found 11/9![United Airlines logo]()
$424
This Delta deal was found by Cheapflights users on 11/5. 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 1/277:17 am -
2 stops8h 58m
Tue 2/21:14 pm -
1 stop5h 55m
Deal found 11/5![Delta logo]()
$434
This American Airlines deal was found by Cheapflights users on 11/9. 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 1/297:00 am -
1 stop7h 19m
Wed 2/31:02 pm -
2 stops24h 38m
Deal found 11/9![American Airlines logo]()
$578
This United Airlines deal was found by Cheapflights users on 11/5. 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 1/276:00 am -
1 stop8h 00m
Tue 2/27:15 am -
1 stop6h 31m
Deal found 11/5![United Airlines logo]()
$429
This Delta deal was found by Cheapflights users on 11/5. 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.
Sun 12/136:00 am -
1 stop7h 41m
Wed 12/162:30 pm -
1 stop8h 11m
Deal found 11/5![Delta logo]()
$435
This United Airlines deal was found by Cheapflights users on 11/9. 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 1/28:15 am -
1 stop6h 16m
Sat 1/912:32 pm -
1 stop6h 46m
Deal found 11/9![United Airlines logo]()
$429
This American Airlines deal was found by Cheapflights users on 11/5. 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.
Sat 2/277:16 am -
1 stop8h 41m
Sat 3/612:50 pm -
1 stop7h 58m
Deal found 11/5![American Airlines logo]()
$647
This Delta deal was found by Cheapflights users on 11/9. 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 12/156:00 am -
1 stop8h 33m
Thu 12/178:02 am -
2 stops13h 21m
Deal found 11/9![Delta logo]()
$447
This United Airlines deal was found by Cheapflights users on 11/9. 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 1/286:00 am -
1 stop8h 00m
Tue 2/23:25 pm -
1 stop6h 01m
Deal found 11/9![United Airlines logo]()
$429
This Delta deal was found by Cheapflights users on 11/5. 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 1/56:00 am -
1 stop8h 34m
Fri 1/812:12 pm -
1 stop9h 19m
Deal found 11/5![Delta logo]()
$449
This American Airlines deal was found by Cheapflights users on 11/9. 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 4/289:19 am -
2 stops9h 08m
Sun 5/212:43 pm -
1 stop8h 45m
Deal found 11/9![American Airlines logo]()
$675
This United Airlines deal was found by Cheapflights users on 11/8. 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 12/306:45 am -
1 stop7h 52m
Mon 1/44:38 pm -
1 stop6h 19m
Deal found 11/8![United Airlines logo]()
$429
This Delta deal was found by Cheapflights users on 11/8. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/46:00 am -
1 stop8h 33m
Tue 12/86:05 pm -
2 stops13h 11m
Deal found 11/8![Delta logo]()
$451
This United Airlines deal was found by Cheapflights users on 11/6. 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 12/15:30 pm -
Nonstop4h 09m
Sun 12/67:40 am -
Nonstop3h 17m
Deal found 11/6![United Airlines logo]()
$433
This American Airlines deal was found by Cheapflights users on 11/8. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/3012:14 pm -
2 stops14h 17m
Mon 1/46:48 pm -
2 stops11h 53m
Deal found 11/8![American Airlines logo]()
$723
This Delta deal was found by Cheapflights users on 11/5. 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.
Sat 5/14:00 pm -
1 stop7h 21m
Wed 5/56:00 am -
1 stop6h 41m
Deal found 11/5![Delta logo]()
$461
This United Airlines deal was found by Cheapflights users on 11/7. 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.
Sun 1/36:45 am -
1 stop6h 14m
Sat 1/91:34 pm -
1 stop7h 52m
Deal found 11/7![United Airlines logo]()
$433
This Delta deal was found by Cheapflights users on 11/9. 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.
Sat 5/14:00 pm -
1 stop7h 21m
Mon 5/36:00 am -
1 stop8h 36m
Deal found 11/9![Delta logo]()
$484
Last-minute flights from Dulles Intl to ColoradoDiscover last-minute flight deals from Dulles Intl to Colorado. Data last updated November 10, 2026 and is based on user searches.
Discover last-minute flight deals from Dulles Intl to Colorado. Data last updated November 10, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 11/5. 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.
Tue 11/1711:16 am -
1 stop10h 44m
Tue 11/2410:51 am -
1 stop9h 11m
Deal found 11/5![Frontier logo]()
$299
This Kiwi.com deal was found by Cheapflights users on 11/6. 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.
Sat 11/2110:47 pm -
1 stop9h 49m
Fri 11/2710:25 am -
1 stop8h 36m
Deal found 11/6![Frontier logo]()
$301
This Cheapflightsfares deal was found by Cheapflights users on 11/9. 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 11/219:35 pm -
1 stop27h 07m
Tue 11/2410:50 pm -
1 stop28h 20m
Deal found 11/9![Frontier logo]()
$308
This Cheapflightsfares deal was found by Cheapflights users on 11/5. 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 11/271:09 pm -
1 stop13h 45m
Mon 11/303:52 pm -
1 stop16h 13m
Deal found 11/5![Frontier logo]()
$303
This Trip.com deal was found by Cheapflights users on 11/6. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/271:09 pm -
1 stop13h 45m
Thu 12/310:25 am -
2 stops29h 20m
Deal found 11/6![Frontier logo]()
$307
This Frontier deal was found by Cheapflights users on 11/9. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/3010:47 pm -
1 stop9h 49m
Mon 12/77:10 am -
1 stop11h 00m
Deal found 11/9![Frontier logo]()
$310
This Kiwi.com deal was found by Cheapflights users on 11/9. 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.
Tue 12/112:06 pm -
2 stops11h 44m
Thu 12/1010:26 am -
1 stop7h 44m
Deal found 11/9![Frontier logo]()
$302
This Frontier deal was found by Cheapflights users on 11/9. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/311:18 am -
1 stop7h 47m
Sun 12/137:10 am -
1 stop11h 00m
Deal found 11/9![Frontier logo]()
$305
This Mytrip deal was found by Cheapflights users on 11/7. 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 12/46:42 pm -
2 stops19h 53m
Mon 12/76:59 pm -
2 stops17h 50m
Deal found 11/7![Frontier logo]()
$306
This Mytrip deal was found by Cheapflights users on 11/8. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/910:35 pm -
2 stops16h 00m
Sat 12/128:40 pm -
2 stops16h 09m
Deal found 11/8![Frontier logo]()
$309
This Expedia deal was found by Cheapflights users on 11/5. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/228:51 pm -
1 stop17h 27m
Mon 12/286:00 am -
1 stop7h 13m
Deal found 11/5![Frontier logo]()
$300
This Kiwi.com deal was found by Cheapflights users on 11/10. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/2210:59 pm -
1 stop9h 30m
Wed 12/306:00 am -
1 stop7h 13m
Deal found 11/10![Frontier logo]()
$304
One-way flights from Dulles Intl to ColoradoSearch for one-way flight options from Dulles Intl to Colorado. Find affordable one-way fares based on user searches. Data last updated November 10, 2026.
Search for one-way flight options from Dulles Intl to Colorado. Find affordable one-way fares based on user searches. Data last updated November 10, 2026.
This Kiwi.com deal was found by Cheapflights users on 11/7. 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.
Tue 12/810:35 pm -
3 stops38h 09m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/7![Multiple Airlines logo]()
$139
This Cheapflightsfares deal was found by Cheapflights users on 11/6. 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.
Mon 11/239:35 pm -
1 stop14h 38m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/6![Frontier logo]()
$169
This Mytrip deal was found by Cheapflights users on 11/8. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/221:09 pm -
1 stop31h 16m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/8![Frontier logo]()
$171
This Super.com deal was found by Cheapflights users on 11/5. 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.
Sat 1/21:55 pm -
1 stop20h 52m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/5![Frontier logo]()
$172
This CheapOair deal was found by Cheapflights users on 11/9. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 1/95:30 am -
2 stops29h 03m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/9![Frontier logo]()
$175
This Super.com deal was found by Cheapflights users on 11/9. 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 2/128:28 pm -
1 stop13h 35m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/9![Frontier logo]()
$176
This Super.com deal was found by Cheapflights users on 11/7. 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 12/309:44 pm -
1 stop27h 03m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/7![Frontier logo]()
$177
This Kiwi.com deal was found by Cheapflights users on 11/9. 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 12/1610:35 pm -
2 stops23h 10m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/9![Frontier logo]()
$179
This Super.com deal was found by Cheapflights users on 11/9. 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.
Thu 11/2610:47 pm -
1 stop9h 49m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/9![Frontier logo]()
$183
This Mytrip deal was found by Cheapflights users on 11/5. 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 12/1810:59 pm -
2 stops23h 23m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/5![Frontier logo]()
$185
This Delta deal was found by Cheapflights users on 11/5. 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.
Fri 1/227:17 am -
1 stop8h 07m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/5![Delta logo]()
$193
This United Airlines deal was found by Cheapflights users on 11/8. 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.
Tue 12/82:10 pm -
1 stop8h 39m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/8![United Airlines logo]()
$197
Find flight deals from Dulles Intl to Colorado
Keep the following information in mind while searching for Dulles Intl to Colorado flight deals. Data was last updated November 10, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $300 (CheapOair) |
One-way from | $139 (Kiwi.com) |
Popular in | June |
Cheapest in | February |
Average price | $397 |
Good round-trip deal | $452 or less |
Good one-way deal | $271 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from Dulles Intl 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 November 10, 2026.
Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport to Colorado that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
Washington, D.C.Colorado Springs
IAD Washington, D.C. Dulles Intl - COS Colorado Springs
IADCOS
Washington, D.C. Dulles Intl
Tue 12/8
10:35 pm-10:44 am
3 stops38h 09m
Colorado Springs
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$139
Washington, D.C.Montrose
IAD Washington, D.C. Dulles Intl - MTJ Montrose County
IADMTJ
Washington, D.C. Dulles Intl
Fri 1/22
7:17 am-1:24 pm
1 stop8h 07m
Montrose County
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$193
Washington, D.C.Colorado Springs
IAD Washington, D.C. Dulles Intl - COS Colorado Springs
IADCOS
Washington, D.C. Dulles Intl
Tue 12/8
2:10 pm-8:49 pm
1 stop8h 39m
Colorado Springs
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$197
Washington, D.C.Colorado Springs
IAD Washington, D.C. Dulles Intl - COS Colorado Springs
IADCOS
Washington, D.C. Dulles Intl
Tue 12/8
6:00 am-12:33 pm
1 stop8h 33m
Colorado Springs
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$197
Washington, D.C.Colorado Springs
IAD Washington, D.C. Dulles Intl - COS Colorado Springs
IADCOS
Washington, D.C. Dulles Intl
Wed 2/10
7:17 am-12:34 pm
1 stop7h 17m
Colorado Springs
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$197
Washington, D.C.Hayden
IAD Washington, D.C. Dulles Intl - HDN Hayden Yampa Valley
IADHDN
Washington, D.C. Dulles Intl
Sat 1/23
5:30 pm-3:11 pm
1 stop23h 41m
Hayden Yampa Valley
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$220
Washington, D.C.Montrose
IAD Washington, D.C. Dulles Intl - MTJ Montrose County
IADMTJ
Washington, D.C. Dulles Intl
Sat 2/20
4:05 pm-8:56 pm
1 stop6h 51m
Montrose County
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$223
Washington, D.C.Denver
IAD Washington, D.C. Dulles Intl - DEN Denver Intl
IADDEN
Washington, D.C. Dulles Intl
Thu 12/31
5:28 pm-7:41 pm
Nonstop4h 13m
Denver Intl
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$229
Quickest round-trip
Washington, D.C.Denver
IAD Washington, D.C. Dulles Intl - DEN Denver Intl
IADDEN
Washington, D.C. Dulles Intl
Tue 12/22
10:12 pm-12:15 am
Nonstop4h 03m
Denver Intl
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$229
Washington, D.C.Denver
IAD Washington, D.C. Dulles Intl - DEN Denver Intl
IADDEN
Washington, D.C. Dulles Intl
Thu 12/10
9:40 am-3:10 pm
1 stop7h 30m
Denver Intl
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$232
Showing 1-10 of 60 resultsSorted by cheapest first
Best time to book a flight from Dulles Intl to Colorado
Have a flexible travel schedule? Discover the best time to fly to Colorado from Dulles Intl with our price prediction graph.
IAD-DEN
IAD-COS
IAD-MTJ
IAD-HDN
IAD-ASE
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 Washington, D.C. Dulles Intl Airport to Colorado
IAD-USCO
IAD-DEN
IAD-COS
IAD-MTJ
IAD-HDN
What is the cheapest month to book a flight from Washington, D.C. Dulles Intl Airport to Colorado?
Currently, January is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Colorado (average of $338). Flying from Washington, D.C. Dulles Intl Airport to Colorado in July is currently the most expensive (average of $540). 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 IAD to CO?
Find hourly flight availability from Dulles Intl 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 November 10, 2026.
It’s typically best to fly out from Washington, D.C. Dulles Intl Airport to Colorado in the evening. Doing so could potentially save you 19% on the flight price compared to flying in the morning, which is usually more expensive.
Weekly flight availability from Washington, D.C. Dulles Intl Airport to Colorado
Explore weekly flight availability from Dulles Intl to Colorado. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated November 10, 2026.
The most flights from IAD to USCO are scheduled on a Sunday (27 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (17 on average).
How much does it cost to fly round-trip from Washington, D.C. Dulles Intl Airport to Colorado?
Airfare is below average for this route at the moment.
Washington, D.C. Dulles Intl Airport to Colorado flights typically cost between $427 and $664 in December.The cheapest round-trip price found within the last 5 days was $300 on Frontier (Dec 22-Dec 28).
How far ahead should I book a flight from Washington, D.C. Dulles Intl Airport to Colorado?
To ensure you get the cheapest price possible for a flight from Washington, D.C. Dulles Intl Airport to Colorado, you should look to book at least 68 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.
What is the cheapest day to fly from Washington, D.C. Dulles Intl Airport to Colorado?
Use this chart to determine the cheapest time to fly round-trip from Dulles Intl to Colorado. Price data was last updated on November 7, 2026.
Travelers seeking maximum savings on their Washington, D.C. Dulles Intl Airport to Colorado flight should consider departing on Wednesday evenings when fares are most often at their lowest. Sunday afternoons 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 November 10, 2026.
Peruse reviews from past customers who have flown with Southwest,Delta, andUnited Airlines from Washington, D.C. Dulles Intl Airport to Colorado to help guide your decision. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Boarding
8.1
Crew
8.6
Entertainment
7.4
Overall
8.0
Comfort
8.0
Food
7.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Boarding
8.1
Crew
8.6
Entertainment
7.4
Overall
8.0
Comfort
8.0
Food
7.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Boarding
8.1
Crew
8.6
Entertainment
7.4
Overall
8.0
Comfort
8.0
Food
7.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Boarding
8.1
Crew
8.6
Entertainment
7.4
Overall
8.0
Comfort
8.0
Food
7.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Boarding
8.1
Crew
8.6
Entertainment
7.4
Overall
8.0
Comfort
8.0
Food
7.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Boarding
8.1
Crew
8.6
Entertainment
7.4
Overall
8.0
Comfort
8.0
Food
7.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Related info for your journey
Find useful and relevant information for your journey from Dulles Intl 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 Dulles Intl to Colorado
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Complete your trip
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Dulles Intl and Colorado flights
Browse other Dulles Intl and Colorado flight options. Last updated on November 10, 2026.
Popular flight searches
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Dulles Intl to Colorado flights
Consider these flights traveling from Dulles Intl to Colorado.
Top 6 airlines flying from Dulles Intl to Colorado
Discover the top 6 airlines that operate flights from Dulles Intl 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 November 10, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$133 | Average$294 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$161 | Average$360 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$197 | Average$408 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$218 | Average$485 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$248 | Average$560 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$332 | Average$478 | FlexibilityNo cancel fee | On-time71% |