$53+ Cheap flights from Washington to Colorado
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 4/16. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — DEN
Apr 17 — Apr 241
Round-trip
1 adult, Economy
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Cheapest flights from Washington to ColoradoExplore the most affordable flight options available from Washington to Colorado. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 18, 2026.
Explore the most affordable flight options available from Washington to Colorado. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 18, 2026.
This Kiwi.com deal was found by Cheapflights users on 3/14. 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 4/227:12 pm
SEA
- DEN
Nonstop2h 47m
Frontier
Fri 4/2412:51 pm
DEN
- SEA
Nonstop3h 14m
Frontier
Deal found 3/14![Frontier logo]()
$81
This Cheapflightsfares deal was found by Cheapflights users on 3/14. 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 4/912:42 pm
SEA
- DEN
Nonstop2h 55m
Frontier
Tue 4/147:15 am
DEN
- SEA
Nonstop3h 12m
Frontier
Deal found 3/14![Frontier logo]()
$82
This Cheapflightsfares deal was found by Cheapflights users on 3/16. 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 5/44:20 pm
SEA
- DEN
Nonstop2h 51m
Frontier
Mon 5/117:50 am
DEN
- SEA
Nonstop2h 59m
Frontier
Deal found 3/16![Frontier logo]()
$88
This Kiwi.com deal was found by Cheapflights users on 3/14. 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 4/158:07 pm
SEA
- DEN
Nonstop2h 52m
Frontier
Mon 4/207:15 am
DEN
- SEA
Nonstop3h 12m
Frontier
Deal found 3/14![Frontier logo]()
$91
This Kiwi.com deal was found by Cheapflights users on 3/13. 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 4/1711:48 am
PDX
- DEN
Nonstop2h 38m
Frontier
Sun 4/198:24 am
DEN
- PDX
Nonstop2h 56m
Frontier
Deal found 3/13![Frontier logo]()
$91
This Cheapflightsfares deal was found by Cheapflights users on 3/13. 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 4/187:12 pm
SEA
- DEN
Nonstop2h 47m
Frontier
Mon 4/207:15 am
DEN
- SEA
Nonstop3h 12m
Frontier
Deal found 3/13![Frontier logo]()
$92
This Trip.com deal was found by Cheapflights users on 3/16. 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.
Thu 4/234:20 pm
SEA
- DEN
Nonstop2h 51m
Multiple Airlines
Mon 4/276:00 am
DEN
- SEA
Nonstop3h 03m
Multiple Airlines
Deal found 3/16![Multiple Airlines logo]()
$93
This Trip.com deal was found by Cheapflights users on 3/18. 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 4/177:12 pm
SEA
- DEN
Nonstop2h 47m
Multiple Airlines
Fri 4/246:00 am
DEN
- SEA
Nonstop3h 03m
Multiple Airlines
Deal found 3/18![Multiple Airlines logo]()
$95
This Super.com deal was found by Cheapflights users on 3/16. 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.
Tue 4/147:12 pm
SEA
- DEN
Nonstop2h 47m
Frontier
Mon 4/207:15 am
DEN
- SEA
Nonstop3h 12m
Frontier
Deal found 3/16![Frontier logo]()
$97
This Cheapflightsfares deal was found by Cheapflights users on 3/17. 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.
Tue 4/141:48 pm
PDX
- DEN
Nonstop2h 41m
Frontier
Sat 4/189:49 am
DEN
- PDX
Nonstop2h 53m
Frontier
Deal found 3/17![Frontier logo]()
$97
This Frontier deal was found by Cheapflights users on 3/16. 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.
Sat 4/187:12 pm
SEA
- DEN
Nonstop2h 47m
Frontier
Wed 4/227:15 am
DEN
- SEA
Nonstop3h 12m
Frontier
Deal found 3/16![Frontier logo]()
$98
This CheapOair deal was found by Cheapflights users on 3/13. 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.
Wed 4/1512:28 pm
PDX
- DEN
Nonstop2h 40m
Frontier
Wed 4/2210:00 am
DEN
- PDX
Nonstop2h 52m
Frontier
Deal found 3/13![Frontier logo]()
$98
Best flights from Washington to ColoradoDiscover carefully curated flight deals from Washington to Colorado that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated March 18, 2026.
Discover carefully curated flight deals from Washington to Colorado that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated March 18, 2026.
This Delta deal was found by Cheapflights users on 3/15. 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 4/87:46 pm
SEA
- DEN
Nonstop2h 46m
Delta
Wed 4/156:55 am
DEN
- SEA
Nonstop3h 06m
Delta
Deal found 3/15![Delta logo]()
$147
This Alaska Airlines deal was found by Cheapflights users on 3/16. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/138:11 pm
SEA
- DEN
Nonstop2h 45m
Alaska Airlines
Fri 4/246:00 am
DEN
- SEA
Nonstop3h 03m
Alaska Airlines
Deal found 3/16![Alaska Airlines logo]()
$147
This Southwest deal was found by Cheapflights users on 3/13. 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.
Sun 5/35:35 am
SEA
- COS
1 stop6h 35m
Southwest
Wed 5/64:45 pm
COS
- SEA
1 stop7h 50m
Southwest
Deal found 3/13![Southwest logo]()
$157
This United Airlines deal was found by Cheapflights users on 3/17. 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 5/157:05 pm
SEA
- DEN
Nonstop2h 51m
United Airlines
Wed 5/205:20 am
DEN
- SEA
1 stop8h 05m
United Airlines
Deal found 3/17![United Airlines logo]()
$187
This Southwest deal was found by Cheapflights users on 3/13. 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 5/25:45 am
SEA
- COS
1 stop6h 55m
Southwest
Wed 5/64:05 pm
COS
- SEA
1 stop7h 25m
Southwest
Deal found 3/13![Southwest logo]()
$157
This Delta deal was found by Cheapflights users on 3/13. 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 3/317:46 pm
SEA
- DEN
Nonstop2h 46m
Delta
Tue 4/77:40 pm
DEN
- SEA
Nonstop3h 12m
Delta
Deal found 3/13![Delta logo]()
$177
This Alaska Airlines deal was found by Cheapflights users on 3/13. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/52:30 pm
PDX
- DEN
1 stop8h 29m
Alaska Airlines
Wed 5/61:02 pm
DEN
- PDX
1 stop8h 46m
Alaska Airlines
Deal found 3/13![Alaska Airlines logo]()
$177
This United Airlines deal was found by Cheapflights users on 3/17. 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 5/157:05 pm
SEA
- DEN
Nonstop2h 51m
United Airlines
Sun 5/177:40 am
DEN
- SEA
Nonstop3h 00m
United Airlines
Deal found 3/17![United Airlines logo]()
$194
This Delta deal was found by Cheapflights users on 3/13. 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 5/187:59 pm
SEA
- DEN
Nonstop2h 53m
Delta
Wed 5/206:05 am
DEN
- SEA
Nonstop3h 04m
Delta
Deal found 3/13![Delta logo]()
$177
This Southwest deal was found by Cheapflights users on 3/14. 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 5/88:35 am
PDX
- DEN
2 stops6h 50m
Southwest
Tue 5/128:20 pm
DEN
- PDX
Nonstop2h 40m
Southwest
Deal found 3/14![Southwest logo]()
$182
This Delta deal was found by Cheapflights users on 3/14. 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 4/117:46 pm
SEA
- DEN
Nonstop2h 46m
Delta
Thu 4/161:20 pm
DEN
- SEA
Nonstop2h 55m
Delta
Deal found 3/14![Delta logo]()
$187
This Southwest deal was found by Cheapflights users on 3/15. 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 4/1512:45 pm
PDX
- DEN
1 stop4h 30m
Southwest
Mon 4/206:25 pm
DEN
- PDX
1 stop7h 30m
Southwest
Deal found 3/15![Southwest logo]()
$187
This United Airlines deal was found by Cheapflights users on 3/16. 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 5/165:02 am
SEA
- DEN
Nonstop2h 44m
United Airlines
Wed 5/205:20 am
DEN
- SEA
1 stop6h 23m
United Airlines
Deal found 3/16![United Airlines logo]()
$206
This American Airlines deal was found by Cheapflights users on 3/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/310:17 am
SEA
- ASE
1 stop8h 59m
American Airlines
Sun 9/67:30 am
ASE
- SEA
1 stop10h 12m
American Airlines
Deal found 3/17![American Airlines logo]()
$494
This Southwest deal was found by Cheapflights users on 3/13. 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.
Tue 4/287:00 am
PDX
- DEN
2 stops9h 00m
Southwest
Thu 4/305:50 am
DEN
- PDX
1 stop5h 55m
Southwest
Deal found 3/13![Southwest logo]()
$192
This Alaska Airlines deal was found by Cheapflights users on 3/17. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/158:07 pm
SEA
- DEN
Nonstop2h 52m
Alaska Airlines
Wed 5/206:40 am
DEN
- SEA
1 stop17h 38m
Alaska Airlines
Deal found 3/17![Alaska Airlines logo]()
$261
This Southwest deal was found by Cheapflights users on 3/13. 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 4/256:40 am
SEA
- DEN
1 stop6h 15m
Southwest
Tue 4/282:50 pm
DEN
- SEA
2 stops7h 10m
Southwest
Deal found 3/13![Southwest logo]()
$198
This Delta deal was found by Cheapflights users on 3/13. 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 5/195:51 pm
PDX
- DEN
1 stop5h 01m
Delta
Thu 5/286:35 pm
DEN
- PDX
1 stop6h 20m
Delta
Deal found 3/13![Delta logo]()
$232
This United Airlines deal was found by Cheapflights users on 3/17. 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 4/285:00 am
SEA
- MTJ
1 stop6h 41m
United Airlines
Sat 5/21:43 pm
MTJ
- SEA
2 stops9h 15m
United Airlines
Deal found 3/17![United Airlines logo]()
$276
This Delta deal was found by Cheapflights users on 3/18. 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 5/95:51 pm
PDX
- DEN
1 stop5h 01m
Delta
Mon 5/116:05 am
DEN
- PDX
1 stop5h 35m
Delta
Deal found 3/18![Delta logo]()
$245
This Southwest deal was found by Cheapflights users on 3/16. 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 4/161:55 pm
SEA
- COS
1 stop7h 20m
Southwest
Mon 4/207:20 pm
COS
- SEA
1 stop6h 35m
Southwest
Deal found 3/16![Southwest logo]()
$236
This Alaska Airlines deal was found by Cheapflights users on 3/14. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/258:00 am
PSC
- DEN
1 stop7h 02m
Alaska Airlines
Tue 5/128:00 am
DEN
- PSC
1 stop8h 42m
Alaska Airlines
Deal found 3/14![Alaska Airlines logo]()
$318
This United Airlines deal was found by Cheapflights users on 3/14. 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 4/285:00 am
SEA
- COS
1 stop5h 05m
United Airlines
Wed 4/291:33 pm
COS
- SEA
2 stops9h 13m
United Airlines
Deal found 3/14![United Airlines logo]()
$302
This Delta deal was found by Cheapflights users on 3/13. 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 5/95:37 pm
GEG
- DEN
1 stop5h 15m
Delta
Sat 5/163:49 pm
DEN
- GEG
2 stops9h 10m
Delta
Deal found 3/13![Delta logo]()
$250
This Alaska Airlines deal was found by Cheapflights users on 3/13. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/274:19 pm
PSC
- DEN
1 stop6h 40m
Alaska Airlines
Mon 5/46:00 am
DEN
- PSC
1 stop16h 42m
Alaska Airlines
Deal found 3/13![Alaska Airlines logo]()
$326
This Southwest deal was found by Cheapflights users on 3/15. 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 6/16:10 am
PDX
- DEN
Nonstop2h 30m
Southwest
Thu 6/49:05 pm
DEN
- PDX
Nonstop2h 40m
Southwest
Deal found 3/15![Southwest logo]()
$247
This United Airlines deal was found by Cheapflights users on 3/14. 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 9/55:00 am
SEA
- DRO
1 stop6h 28m
United Airlines
Wed 9/91:30 pm
DRO
- SEA
1 stop5h 15m
United Airlines
Deal found 3/14![United Airlines logo]()
$308
This Delta deal was found by Cheapflights users on 3/15. 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 4/77:46 pm
SEA
- DEN
Nonstop2h 46m
Delta
Mon 4/135:30 am
DEN
- SEA
1 stop4h 45m
Delta
Deal found 3/15![Delta logo]()
$257
This Alaska Airlines deal was found by Cheapflights users on 3/16. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/2811:00 am
PAE
- DEN
1 stop11h 59m
Alaska Airlines
Wed 4/296:45 am
DEN
- PAE
2 stops28h 04m
Alaska Airlines
Deal found 3/16![Alaska Airlines logo]()
$328
This Southwest deal was found by Cheapflights users on 3/17. 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 4/246:05 pm
PDX
- DEN
1 stop5h 15m
Southwest
Mon 4/274:25 pm
DEN
- PDX
2 stops7h 15m
Southwest
Deal found 3/17![Southwest logo]()
$262
Last-minute flights from Washington to ColoradoDiscover last-minute flight deals from Washington to Colorado. Data last updated March 18, 2026 and is based on user searches.
Discover last-minute flight deals from Washington to Colorado. Data last updated March 18, 2026 and is based on user searches.
This Cheapflightsfares deal was found by Cheapflights users on 3/14. 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 4/912:42 pm
SEA
- DEN
Nonstop2h 55m
Frontier
Tue 4/147:15 am
DEN
- SEA
Nonstop3h 12m
Frontier
Deal found 3/14![Frontier logo]()
$82
This Super.com deal was found by Cheapflights users on 3/16. 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.
Tue 4/147:12 pm
SEA
- DEN
Nonstop2h 47m
Frontier
Mon 4/207:15 am
DEN
- SEA
Nonstop3h 12m
Frontier
Deal found 3/16![Frontier logo]()
$97
This Cheapflightsfares deal was found by Cheapflights users on 3/17. 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.
Tue 4/141:48 pm
PDX
- DEN
Nonstop2h 41m
Frontier
Sat 4/189:49 am
DEN
- PDX
Nonstop2h 53m
Frontier
Deal found 3/17![Frontier logo]()
$97
This Kiwi.com deal was found by Cheapflights users on 3/14. 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 4/158:07 pm
SEA
- DEN
Nonstop2h 52m
Frontier
Mon 4/207:15 am
DEN
- SEA
Nonstop3h 12m
Frontier
Deal found 3/14![Frontier logo]()
$91
This CheapOair deal was found by Cheapflights users on 3/13. 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.
Wed 4/1512:28 pm
PDX
- DEN
Nonstop2h 40m
Frontier
Wed 4/2210:00 am
DEN
- PDX
Nonstop2h 52m
Frontier
Deal found 3/13![Frontier logo]()
$98
This Kiwi.com deal was found by Cheapflights users on 3/13. 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 4/1711:48 am
PDX
- DEN
Nonstop2h 38m
Frontier
Sun 4/198:24 am
DEN
- PDX
Nonstop2h 56m
Frontier
Deal found 3/13![Frontier logo]()
$91
This Trip.com deal was found by Cheapflights users on 3/18. 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 4/177:12 pm
SEA
- DEN
Nonstop2h 47m
Multiple Airlines
Fri 4/246:00 am
DEN
- SEA
Nonstop3h 03m
Multiple Airlines
Deal found 3/18![Multiple Airlines logo]()
$95
This Cheapflightsfares deal was found by Cheapflights users on 3/13. 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 4/187:12 pm
SEA
- DEN
Nonstop2h 47m
Frontier
Mon 4/207:15 am
DEN
- SEA
Nonstop3h 12m
Frontier
Deal found 3/13![Frontier logo]()
$92
This Frontier deal was found by Cheapflights users on 3/16. 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.
Sat 4/187:12 pm
SEA
- DEN
Nonstop2h 47m
Frontier
Wed 4/227:15 am
DEN
- SEA
Nonstop3h 12m
Frontier
Deal found 3/16![Frontier logo]()
$98
This Kiwi.com deal was found by Cheapflights users on 3/14. 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 4/227:12 pm
SEA
- DEN
Nonstop2h 47m
Frontier
Fri 4/2412:51 pm
DEN
- SEA
Nonstop3h 14m
Frontier
Deal found 3/14![Frontier logo]()
$81
This Trip.com deal was found by Cheapflights users on 3/16. 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.
Thu 4/234:20 pm
SEA
- DEN
Nonstop2h 51m
Multiple Airlines
Mon 4/276:00 am
DEN
- SEA
Nonstop3h 03m
Multiple Airlines
Deal found 3/16![Multiple Airlines logo]()
$93
This Frontier deal was found by Cheapflights users on 3/17. 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.
Wed 4/297:12 pm
SEA
- DEN
Nonstop2h 47m
Frontier
Sun 5/37:15 am
DEN
- SEA
Nonstop3h 12m
Frontier
Deal found 3/17![Frontier logo]()
$88
One-way flights from Washington to ColoradoSearch for one-way flight options from Washington to Colorado. Find affordable one-way fares based on user searches. Data last updated March 18, 2026.
Search for one-way flight options from Washington to Colorado. Find affordable one-way fares based on user searches. Data last updated March 18, 2026.
This Kiwi.com deal was found by Cheapflights users on 3/18. 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.
Thu 4/167:12 pm
SEA
- DEN
Nonstop2h 47m
Frontier
Deal found 3/18![Frontier logo]()
$53
This Cheapflightsfares deal was found by Cheapflights users on 3/17. 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.
Tue 5/197:50 pm
SEA
- DEN
Nonstop3h 04m
Frontier
Deal found 3/17![Frontier logo]()
$54
This Orbitz deal was found by Cheapflights users on 3/17. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/137:50 pm
SEA
- DEN
Nonstop3h 04m
Frontier
Deal found 3/17![Frontier logo]()
$56
This Kiwi.com deal was found by Cheapflights users on 3/14. 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 5/49:19 pm
SEA
- DEN
1 stop25h 50m
Frontier
Deal found 3/14![Frontier logo]()
$67
This Delta deal was found by Cheapflights users on 3/16. 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 5/137:59 pm
SEA
- DEN
Nonstop2h 53m
Delta
Deal found 3/16![Delta logo]()
$69
This Kiwi.com deal was found by Cheapflights users on 3/15. 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 4/1310:09 pm
SEA
- DEN
1 stop10h 34m
Frontier
Deal found 3/15![Frontier logo]()
$70
This Southwest deal was found by Cheapflights users on 3/16. 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 5/26:40 am
SEA
- DEN
1 stop5h 10m
Southwest
Deal found 3/16![Southwest logo]()
$74
This Kiwi.com deal was found by Cheapflights users on 3/16. 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.
Sun 4/199:54 pm
SEA
- DEN
1 stop29h 05m
Frontier
Deal found 3/16![Frontier logo]()
$75
This Kiwi.com deal was found by Cheapflights users on 3/15. 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 4/1011:58 am
PDX
- DEN
Nonstop2h 38m
Frontier
Deal found 3/15![Frontier logo]()
$78
This Delta deal was found by Cheapflights users on 3/16. 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 5/195:30 am
SEA
- DEN
1 stop5h 15m
Delta
Deal found 3/16![Delta logo]()
$79
This Cheapflightsfares deal was found by Cheapflights users on 3/17. 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 4/1711:48 am
PDX
- DEN
Nonstop2h 38m
Frontier
Deal found 3/17![Frontier logo]()
$79
This Delta deal was found by Cheapflights users on 3/16. 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 4/285:35 am
SEA
- COS
1 stop4h 37m
Delta
Deal found 3/16![Delta logo]()
$79
Find flight deals from Washington to Colorado
Keep the following information in mind while searching for Washington to Colorado flight deals. Data was last updated March 18, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $81 (Kiwi.com) |
One-way from | $53 (Kiwi.com) |
Popular in | June |
Cheapest in | January |
Average price | $219 |
Good round-trip deal | $185 or less |
Good one-way deal | $143 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from Washington 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 2,558,603 searches. Data last updated March 18, 2026.
Use the filters below to find and compare flights from Washington to Colorado that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
SeattleDenver
SEA - DEN
SEADEN
Seattle/Tacoma Intl
Wed 4/8
7:46 pm-11:32 pm
Nonstop2h 46m
Denver Intl
Wed 4/15
6:55 am-9:01 am
Nonstop3h 06m
$147
SeattleDenver
SEA - DEN
SEADEN
Seattle/Tacoma Intl
Mon 4/13
8:11 pm-11:56 pm
Nonstop2h 45m
Denver Intl
Fri 4/24
6:00 am-8:03 am
Nonstop3h 03m
$147
SeattleColorado Springs
SEA - COS
SEACOS
Seattle/Tacoma Intl
Sun 5/3
5:35 am-1:10 pm
1 stop6h 35m
Colorado Springs
Wed 5/6
4:45 pm-11:35 pm
1 stop7h 50m
$157
SeattleColorado Springs
SEA - COS
SEACOS
Seattle/Tacoma Intl
Sat 5/2
5:45 am-1:40 pm
1 stop6h 55m
Colorado Springs
Wed 5/6
4:05 pm-10:30 pm
1 stop7h 25m
$157
SeattleDenver
SEA - DEN
SEADEN
Seattle/Tacoma Intl
Tue 3/31
7:46 pm-11:32 pm
Nonstop2h 46m
Denver Intl
Tue 4/7
7:40 pm-9:52 pm
Nonstop3h 12m
$177
PortlandDenver
PDX - DEN
PDXDEN
Portland
Tue 5/5
2:30 pm-11:59 pm
1 stop8h 29m
Denver Intl
Wed 5/6
1:02 pm-8:48 pm
1 stop8h 46m
$177
SeattleDenver
SEA - DEN
SEADEN
Seattle/Tacoma Intl
Mon 5/18
7:59 pm-11:52 pm
Nonstop2h 53m
Denver Intl
Wed 5/20
6:05 am-8:09 am
Nonstop3h 04m
$177
PortlandDenver
PDX - DEN
PDXDEN
Portland
Fri 5/8
8:35 am-4:25 pm
2 stops6h 50m
Denver Intl
Tue 5/12
8:20 pm-10:00 pm
Nonstop2h 40m
$182
SeattleDenver
SEA - DEN
SEADEN
Seattle/Tacoma Intl
Fri 5/15
7:05 pm-10:56 pm
Nonstop2h 51m
Denver Intl
Wed 5/20
5:20 am-12:25 pm
1 stop8h 05m
$187
SeattleDenver
SEA - DEN
SEADEN
Seattle/Tacoma Intl
Sat 4/11
7:46 pm-11:32 pm
Nonstop2h 46m
Denver Intl
Thu 4/16
1:20 pm-3:15 pm
Nonstop2h 55m
$187
Showing 1-10 of 60 resultsSorted by cheapest first
Best time to book a flight from Washington to Colorado
Have a flexible travel schedule? Discover the best time to fly to Colorado from Washington with our price prediction graph.
SEA-DEN
PDX-DEN
PSC-DEN
SEA-COS
SEA-DRO
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 to Colorado
USWA-USCO
SEA-DEN
PDX-DEN
PSC-DEN
SEA-COS
What is the cheapest month to book a flight from State of Washington to Colorado?
Currently, January is the cheapest month in which you can book a flight from State of Washington to Colorado (average of $37). Flying from State of Washington to Colorado in July is currently the most expensive (average of $100). 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 WA to CO?
Find hourly flight availability from Washington 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 March 18, 2026.
When flying from State of Washington to Colorado, the time of day you fly usually plays a role in the price. Save by searching for a flight in the evening, which can drop the price by up to 21% versus a flight in the morning.
What is the cheapest day to fly from State of Washington to Colorado?
Use this chart to determine the cheapest time to fly round-trip from Washington to Colorado. Price data was last updated on March 14, 2026.
Travelers seeking maximum savings on their State of Washington to Colorado flight should consider departing on Friday at noon when fares are most often at their lowest. Tuesday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.
Weekly flight availability from State of Washington to Colorado
Explore weekly flight availability from Washington 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 March 18, 2026.
The most flights from USWA to USCO are scheduled on a Tuesday (25 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (8 on average).
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 March 18, 2026.
Read through reviews of airlines operating flights from Washington to Colorado, such as Southwest,Alaska Airlines, andDelta. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Comfort
8.0
Food
7.0
Entertainment
7.5
Boarding
8.1
Crew
8.6
Overall
8.0
Reviews
1 / 20
10.0
ExcellentAnonymous,Mar 2026
KOA - HNL
Comfort
8.0
Food
7.0
Entertainment
7.5
Boarding
8.1
Crew
8.6
Overall
8.0
Reviews
1 / 20
10.0
ExcellentAnonymous,Mar 2026
KOA - HNL
Comfort
8.0
Food
7.0
Entertainment
7.5
Boarding
8.1
Crew
8.6
Overall
8.0
Reviews
1 / 20
10.0
ExcellentAnonymous,Mar 2026
KOA - HNL
Comfort
8.0
Food
7.0
Entertainment
7.5
Boarding
8.1
Crew
8.6
Overall
8.0
Reviews
1 / 20
10.0
ExcellentAnonymous,Mar 2026
KOA - HNL
Comfort
8.0
Food
7.0
Entertainment
7.5
Boarding
8.1
Crew
8.6
Overall
8.0
Reviews
1 / 20
10.0
ExcellentAnonymous,Mar 2026
KOA - HNL
Comfort
8.0
Food
7.0
Entertainment
7.5
Boarding
8.1
Crew
8.6
Overall
8.0
Reviews
1 / 20
10.0
ExcellentAnonymous,Mar 2026
KOA - HNL
Related info for your journey
Find useful and relevant information for your journey from Washington 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 Washington to Colorado
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to Colorado by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Washington to Colorado by cabin class
Find flights from Washington to Colorado, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Washington and Colorado flights
Browse other Washington and Colorado flight options. Last updated on March 18, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Find a return flight route from Colorado
Find the right flight back to Washington after your stay in Colorado
Washington to Colorado flights
Consider these flights traveling from Washington to Colorado.
Top 7 airlines flying from Washington to Colorado
Discover the top 7 airlines that operate flights from Washington 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 2,558,603 searches. Data last updated March 18, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$57 | Average$155 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$78 | Average$352 | FlexibilityNo cancel fee | On-time85% | |
| Cheapest$97 | Average$281 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$110 | Average$360 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$118 | Average$382 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$130 | Average$420 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$216 | Average$412 | FlexibilityNo cancel fee | On-time71% |