$65+ Cheap flights from Colorado to Washington
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 5/5. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — SEA
May 18 — May 251
Round-trip
1 adult, Economy
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Cheapest flights from Colorado to WashingtonExplore the most affordable flight options available from Colorado to Washington. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 18, 2026.
Explore the most affordable flight options available from Colorado to Washington. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 18, 2026.
This Kiwi.com deal was found by Cheapflights users on 4/13. 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.
Sun 5/248:00 am
DEN
- SEA
Nonstop3h 06m
Frontier
Sat 5/307:50 pm
SEA
- DEN
Nonstop3h 04m
Frontier
Deal found 4/13![Frontier logo]()
$92
This Kiwi.com deal was found by Cheapflights users on 4/14. 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.
Tue 5/57:50 am
DEN
- SEA
Nonstop2h 59m
Frontier
Tue 5/127:50 pm
SEA
- DEN
Nonstop3h 04m
Frontier
Deal found 4/14![Frontier logo]()
$96
This Super.com deal was found by Cheapflights users on 4/15. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/67:50 am
DEN
- SEA
Nonstop2h 59m
Frontier
Fri 5/87:50 pm
SEA
- DEN
Nonstop3h 04m
Frontier
Deal found 4/15![Frontier logo]()
$97
This Cheapflightsfares deal was found by Cheapflights users on 4/14. 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 5/147:50 am
DEN
- SEA
Nonstop2h 59m
Frontier
Sun 5/243:19 pm
SEA
- DEN
Nonstop2h 59m
Frontier
Deal found 4/14![Frontier logo]()
$98
This Super.com deal was found by Cheapflights users on 4/13. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/248:00 am
DEN
- SEA
Nonstop3h 06m
Frontier
Sun 5/313:19 pm
SEA
- DEN
Nonstop2h 59m
Frontier
Deal found 4/13![Frontier logo]()
$102
This Frontier deal was found by Cheapflights users on 4/16. 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.
Fri 5/87:50 am
DEN
- SEA
Nonstop2h 59m
Frontier
Fri 5/297:50 pm
SEA
- DEN
Nonstop3h 04m
Frontier
Deal found 4/16![Frontier logo]()
$103
This Kiwi.com deal was found by Cheapflights users on 4/14. 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.
Thu 5/77:50 am
DEN
- SEA
Nonstop2h 59m
Frontier
Sat 5/166:52 pm
SEA
- DEN
Nonstop3h 00m
Frontier
Deal found 4/14![Frontier logo]()
$106
This Cheapflightsfares deal was found by Cheapflights users on 4/13. 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.
Thu 5/147:50 am
DEN
- SEA
Nonstop2h 59m
Frontier
Sun 5/177:50 pm
SEA
- DEN
Nonstop3h 04m
Frontier
Deal found 4/13![Frontier logo]()
$107
This Frontier deal was found by Cheapflights users on 4/16. 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.
Fri 5/87:50 am
DEN
- SEA
Nonstop2h 59m
Frontier
Fri 5/87:50 pm
SEA
- DEN
Nonstop3h 04m
Frontier
Deal found 4/16![Frontier logo]()
$108
This Cheapflightsfares deal was found by Cheapflights users on 4/14. 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.
Wed 4/297:15 am
DEN
- SEA
Nonstop3h 12m
Frontier
Tue 5/57:50 pm
SEA
- DEN
Nonstop3h 04m
Frontier
Deal found 4/14![Frontier logo]()
$112
This Frontier deal was found by Cheapflights users on 4/16. 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.
Wed 4/297:15 am
DEN
- SEA
Nonstop3h 12m
Frontier
Wed 5/67:50 pm
SEA
- DEN
Nonstop3h 04m
Frontier
Deal found 4/16![Frontier logo]()
$113
This Kiwi.com deal was found by Cheapflights users on 4/16. 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.
Thu 5/77:50 am
DEN
- SEA
Nonstop2h 59m
Frontier
Fri 5/87:50 pm
SEA
- DEN
Nonstop3h 04m
Frontier
Deal found 4/16![Frontier logo]()
$116
Best flights from Colorado to WashingtonDiscover carefully curated flight deals from Colorado to Washington that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 18, 2026.
Discover carefully curated flight deals from Colorado to Washington that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 18, 2026.
This Delta deal was found by Cheapflights users on 4/14. 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.
Tue 5/196:35 pm
DEN
- SEA
Nonstop3h 02m
Delta
Tue 5/267:59 pm
SEA
- DEN
Nonstop2h 53m
Delta
Deal found 4/14![Delta logo]()
$217
This United Airlines deal was found by Cheapflights users on 4/13. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/78:58 pm
DEN
- SEA
Nonstop3h 01m
United Airlines
Sat 5/95:02 am
SEA
- DEN
Nonstop2h 44m
United Airlines
Deal found 4/13![United Airlines logo]()
$227
This Southwest deal was found by Cheapflights users on 4/14. 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.
Wed 5/68:30 pm
DEN
- SEA
Nonstop3h 00m
Southwest
Sat 5/911:15 am
SEA
- DEN
2 stops7h 45m
Southwest
Deal found 4/14![Southwest logo]()
$232
This Alaska Airlines deal was found by Cheapflights users on 4/14. 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.
Wed 5/208:00 am
DEN
- PDX
Nonstop2h 49m
Alaska Airlines
Fri 5/295:50 pm
PDX
- DEN
1 stop5h 09m
Alaska Airlines
Deal found 4/14![Alaska Airlines logo]()
$237
This Kiwi.com deal was found by Cheapflights users on 4/14. 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.
Sun 5/177:40 am
DEN
- PSC
1 stop8h 00m
Multiple Airlines
Thu 5/212:30 pm
PSC
- DEN
2 stops11h 55m
Multiple Airlines
Deal found 4/14![Multiple Airlines logo]()
$281
This American Airlines deal was found by Cheapflights users on 4/16. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/145:06 pm
DRO
- PDX
1 stop8h 44m
American Airlines
Wed 7/223:26 pm
PDX
- DRO
1 stop7h 36m
American Airlines
Deal found 4/16![American Airlines logo]()
$380
This Delta deal was found by Cheapflights users on 4/17. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/1111:55 am
COS
- PDX
1 stop5h 05m
Delta
Tue 5/195:45 am
PDX
- COS
1 stop4h 30m
Delta
Deal found 4/17![Delta logo]()
$217
This Alaska Airlines deal was found by Cheapflights users on 4/17. 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 5/155:58 pm
DEN
- PDX
Nonstop2h 48m
Alaska Airlines
Sun 5/177:17 am
PDX
- DEN
Nonstop2h 49m
Alaska Airlines
Deal found 4/17![Alaska Airlines logo]()
$237
This Southwest deal was found by Cheapflights users on 4/13. 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.
Thu 5/73:00 pm
DEN
- SEA
1 stop6h 05m
Southwest
Sat 5/96:40 am
SEA
- DEN
1 stop6h 15m
Southwest
Deal found 4/13![Southwest logo]()
$247
This United Airlines deal was found by Cheapflights users on 4/14. 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.
Thu 6/49:10 pm
DEN
- PDX
Nonstop2h 45m
United Airlines
Sun 6/75:00 am
PDX
- DEN
Nonstop2h 31m
United Airlines
Deal found 4/14![United Airlines logo]()
$249
This Delta deal was found by Cheapflights users on 4/17. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/1111:55 am
COS
- PDX
1 stop5h 05m
Delta
Wed 5/205:45 am
PDX
- COS
1 stop4h 30m
Delta
Deal found 4/17![Delta logo]()
$227
This Alaska Airlines deal was found by Cheapflights users on 4/13. 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.
Fri 6/197:05 pm
DEN
- PDX
Nonstop2h 45m
Alaska Airlines
Tue 6/236:04 pm
PDX
- DEN
Nonstop2h 36m
Alaska Airlines
Deal found 4/13![Alaska Airlines logo]()
$247
This United Airlines deal was found by Cheapflights users on 4/17. 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.
Wed 8/266:32 pm
COS
- SEA
1 stop5h 39m
United Airlines
Mon 8/316:00 pm
SEA
- COS
1 stop4h 49m
United Airlines
Deal found 4/17![United Airlines logo]()
$256
This Delta deal was found by Cheapflights users on 4/13. 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.
Wed 5/137:55 am
DEN
- PDX
1 stop5h 38m
Delta
Sat 5/163:30 pm
PDX
- DEN
1 stop7h 22m
Delta
Deal found 4/13![Delta logo]()
$237
This Alaska Airlines deal was found by Cheapflights users on 4/17. 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.
Tue 5/121:02 pm
DEN
- SEA
1 stop9h 43m
Alaska Airlines
Wed 5/134:47 pm
SEA
- DEN
1 stop6h 02m
Alaska Airlines
Deal found 4/17![Alaska Airlines logo]()
$257
This Southwest deal was found by Cheapflights users on 4/13. 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 6/95:30 pm
DEN
- SEA
2 stops7h 00m
Southwest
Tue 6/167:30 am
SEA
- DEN
2 stops7h 20m
Southwest
Deal found 4/13![Southwest logo]()
$296
This Delta deal was found by Cheapflights users on 4/15. 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.
Sun 5/175:30 am
DEN
- PDX
1 stop4h 22m
Delta
Wed 5/201:40 pm
PDX
- DEN
1 stop4h 35m
Delta
Deal found 4/15![Delta logo]()
$247
This United Airlines deal was found by Cheapflights users on 4/17. 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.
Wed 5/61:35 pm
DRO
- PDX
2 stops11h 58m
United Airlines
Tue 5/125:00 am
PDX
- DRO
1 stop5h 06m
United Airlines
Deal found 4/17![United Airlines logo]()
$294
This Alaska Airlines deal was found by Cheapflights users on 4/15. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/116:02 am
DEN
- PSC
1 stop4h 51m
Alaska Airlines
Wed 8/194:00 pm
PSC
- DEN
1 stop4h 46m
Alaska Airlines
Deal found 4/15![Alaska Airlines logo]()
$269
This Delta deal was found by Cheapflights users on 4/16. 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 5/126:05 am
DEN
- PDX
1 stop6h 34m
Delta
Fri 5/155:51 pm
PDX
- DEN
1 stop5h 01m
Delta
Deal found 4/16![Delta logo]()
$247
This Southwest deal was found by Cheapflights users on 4/13. 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 5/169:50 am
COS
- PDX
2 stops9h 30m
Southwest
Mon 5/185:00 pm
PDX
- COS
1 stop5h 50m
Southwest
Deal found 4/13![Southwest logo]()
$300
This United Airlines deal was found by Cheapflights users on 4/17. 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.
Sun 5/175:30 am
DRO
- PDX
1 stop5h 08m
United Airlines
Sun 5/2412:50 pm
PDX
- DRO
1 stop6h 32m
United Airlines
Deal found 4/17![United Airlines logo]()
$298
This Southwest deal was found by Cheapflights users on 4/15. 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.
Thu 5/284:25 pm
DEN
- SEA
2 stops7h 40m
Southwest
Mon 6/16:30 am
SEA
- DEN
1 stop6h 20m
Southwest
Deal found 4/15![Southwest logo]()
$307
This Delta deal was found by Cheapflights users on 4/14. 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.
Tue 6/235:40 am
DEN
- PDX
1 stop3h 57m
Delta
Fri 6/265:50 pm
PDX
- DEN
1 stop4h 55m
Delta
Deal found 4/14![Delta logo]()
$267
This Alaska Airlines deal was found by Cheapflights users on 4/17. 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.
Tue 5/51:02 pm
DEN
- SEA
1 stop9h 43m
Alaska Airlines
Fri 5/84:42 pm
SEA
- DEN
1 stop6h 17m
Alaska Airlines
Deal found 4/17![Alaska Airlines logo]()
$297
This United Airlines deal was found by Cheapflights users on 4/17. 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.
Wed 7/227:24 pm
DEN
- PSC
Nonstop2h 28m
United Airlines
Sun 7/265:14 am
PSC
- DEN
Nonstop2h 22m
United Airlines
Deal found 4/17![United Airlines logo]()
$304
This Southwest deal was found by Cheapflights users on 4/15. 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.
Sat 5/302:15 pm
COS
- PDX
2 stops8h 45m
Southwest
Sat 6/65:00 am
PDX
- COS
1 stop5h 20m
Southwest
Deal found 4/15![Southwest logo]()
$312
This Delta deal was found by Cheapflights users on 4/16. 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 7/16:30 am
DEN
- PDX
1 stop6h 13m
Delta
Mon 7/65:50 pm
PDX
- DEN
1 stop4h 55m
Delta
Deal found 4/16![Delta logo]()
$267
This Alaska Airlines deal was found by Cheapflights users on 4/17. 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.
Wed 5/61:02 pm
DEN
- SEA
1 stop7h 55m
Alaska Airlines
Sat 5/910:22 am
SEA
- DEN
1 stop7h 03m
Alaska Airlines
Deal found 4/17![Alaska Airlines logo]()
$297
This United Airlines deal was found by Cheapflights users on 4/17. 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 5/156:57 pm
COS
- PDX
1 stop4h 57m
United Airlines
Tue 5/195:00 am
PDX
- COS
1 stop5h 05m
United Airlines
Deal found 4/17![United Airlines logo]()
$307
Last-minute flights from Colorado to WashingtonDiscover last-minute flight deals from Colorado to Washington. Data last updated April 18, 2026 and is based on user searches.
Discover last-minute flight deals from Colorado to Washington. Data last updated April 18, 2026 and is based on user searches.
This Frontier deal was found by Cheapflights users on 4/13. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/259:49 am
DEN
- PDX
Nonstop2h 53m
Frontier
Mon 5/411:58 am
PDX
- DEN
Nonstop2h 38m
Frontier
Deal found 4/13![Frontier logo]()
$138
This Frontier deal was found by Cheapflights users on 4/16. 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.
Tue 4/287:15 am
DEN
- SEA
Nonstop3h 12m
Frontier
Wed 5/67:50 pm
SEA
- DEN
Nonstop3h 04m
Frontier
Deal found 4/16![Frontier logo]()
$128
This Frontier deal was found by Cheapflights users on 4/16. 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.
Tue 4/2810:00 am
DEN
- PDX
Nonstop2h 52m
Frontier
Thu 5/79:46 pm
PDX
- DEN
1 stop10h 52m
Frontier
Deal found 4/16![Frontier logo]()
$134
This Frontier deal was found by Cheapflights users on 4/16. 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.
Tue 4/287:15 am
DEN
- SEA
Nonstop3h 12m
Frontier
Fri 5/87:50 pm
SEA
- DEN
Nonstop3h 04m
Frontier
Deal found 4/16![Frontier logo]()
$138
This Kiwi.com deal was found by Cheapflights users on 4/16. 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.
Tue 4/2810:00 am
DEN
- PDX
Nonstop2h 52m
Frontier
Sun 5/109:46 pm
PDX
- DEN
1 stop28h 39m
Frontier
Deal found 4/16![Frontier logo]()
$145
This Cheapflightsfares deal was found by Cheapflights users on 4/13. 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.
Wed 5/610:39 pm
DEN
- PDX
1 stop14h 11m
Frontier
Fri 5/88:46 pm
PDX
- DEN
1 stop11h 52m
Frontier
Deal found 4/13![Frontier logo]()
$139
This Cheapflightsfares deal was found by Cheapflights users on 4/13. 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.
Wed 5/2010:29 pm
DEN
- PDX
1 stop12h 51m
Frontier
Thu 5/2112:35 pm
PDX
- DEN
Nonstop2h 48m
Frontier
Deal found 4/13![Frontier logo]()
$148
This Cheapflightsfares deal was found by Cheapflights users on 4/17. 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.
Sat 5/233:00 pm
DEN
- PDX
Nonstop2h 46m
Frontier
Fri 5/295:31 pm
PDX
- DEN
1 stop6h 07m
Frontier
Deal found 4/17![Frontier logo]()
$133
This Kiwi.com deal was found by Cheapflights users on 4/17. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/233:00 pm
DEN
- PDX
Nonstop2h 46m
Frontier
Sat 5/305:31 pm
PDX
- DEN
2 stops32h 54m
Frontier
Deal found 4/17![Frontier logo]()
$140
This Cheapflightsfares deal was found by Cheapflights users on 4/14. 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 5/287:00 am
DEN
- PDX
1 stop5h 50m
Frontier
Mon 6/112:35 pm
PDX
- DEN
Nonstop2h 48m
Frontier
Deal found 4/14![Frontier logo]()
$143
This iWofly deal was found by Cheapflights users on 4/13. 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 iWofly is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/287:00 am
DEN
- PDX
1 stop5h 50m
Frontier
Thu 6/412:35 pm
PDX
- DEN
Nonstop2h 48m
Frontier
Deal found 4/13![Frontier logo]()
$146
This Kiwi.com deal was found by Cheapflights users on 4/16. 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.
Sat 5/303:00 pm
DEN
- PDX
Nonstop2h 46m
Frontier
Mon 6/811:15 am
PDX
- DEN
1 stop9h 12m
Frontier
Deal found 4/16![Frontier logo]()
$147
One-way flights from Colorado to WashingtonSearch for one-way flight options from Colorado to Washington. Find affordable one-way fares based on user searches. Data last updated April 18, 2026.
Search for one-way flight options from Colorado to Washington. Find affordable one-way fares based on user searches. Data last updated April 18, 2026.
This Kiwi.com deal was found by Cheapflights users on 4/13. 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.
Tue 5/510:39 pm
DEN
- SEA
1 stop20h 56m
Frontier
Deal found 4/13![Frontier logo]()
$65
This Kiwi.com deal was found by Cheapflights users on 4/14. 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.
Sun 6/710:29 pm
DEN
- SEA
1 stop13h 07m
Frontier
Deal found 4/14![Frontier logo]()
$67
This Super.com deal was found by Cheapflights users on 4/15. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/297:15 am
DEN
- SEA
Nonstop3h 12m
Frontier
Deal found 4/15![Frontier logo]()
$68
This Kiwi.com deal was found by Cheapflights users on 4/13. 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.
Thu 5/77:00 am
DEN
- SEA
1 stop12h 35m
Frontier
Deal found 4/13![Frontier logo]()
$74
This Super.com deal was found by Cheapflights users on 4/14. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/610:39 pm
DEN
- PDX
1 stop14h 11m
Frontier
Deal found 4/14![Frontier logo]()
$75
This Kiwi.com deal was found by Cheapflights users on 4/14. 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 5/1310:29 pm
DEN
- PDX
1 stop23h 22m
Frontier
Deal found 4/14![Frontier logo]()
$78
This Super.com deal was found by Cheapflights users on 4/16. 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.
Sat 5/167:50 am
DEN
- SEA
Nonstop2h 59m
Frontier
Deal found 4/16![Frontier logo]()
$80
This Super.com deal was found by Cheapflights users on 4/15. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/167:45 am
DEN
- SEA
Nonstop3h 03m
Frontier
Deal found 4/15![Frontier logo]()
$82
This Cheapflightsfares deal was found by Cheapflights users on 4/14. 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.
Wed 7/17:45 am
DEN
- SEA
Nonstop3h 03m
Frontier
Deal found 4/14![Frontier logo]()
$83
This Kiwi.com deal was found by Cheapflights users on 4/17. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/1710:08 am
DEN
- GEG
Nonstop2h 25m
Frontier
Deal found 4/17![Frontier logo]()
$83
This Frontier deal was found by Cheapflights users on 4/15. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/127:50 am
DEN
- SEA
Nonstop2h 59m
Frontier
Deal found 4/15![Frontier logo]()
$84
This Super.com deal was found by Cheapflights users on 4/14. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/1310:39 pm
DEN
- SEA
1 stop20h 56m
Frontier
Deal found 4/14![Frontier logo]()
$85
Find flight deals from Colorado to Washington
Keep the following information in mind while searching for Colorado to Washington flight deals. Data was last updated April 18, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $92 (Kiwi.com) |
One-way from | $65 (Kiwi.com) |
Popular in | June |
Cheapest in | January |
Average price | $215 |
Good round-trip deal | $119 or less |
Good one-way deal | $114 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from Colorado to Washington 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 April 18, 2026.
Use the filters below to find and compare flights from Colorado to Washington that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
DenverSeattle
DEN - SEA
DENSEA
Denver Intl
Tue 5/19
6:35 pm-8:37 pm
Nonstop3h 02m
Seattle/Tacoma Intl
Tue 5/26
7:59 pm-11:52 pm
Nonstop2h 53m
$217
Colorado SpringsPortland
COS - PDX
COSPDX
Colorado Springs
Mon 5/11
11:55 am-4:00 pm
1 stop5h 05m
Portland
Tue 5/19
5:45 am-11:15 am
1 stop4h 30m
$217
DenverSeattle
DEN - SEA
DENSEA
Denver Intl
Thu 5/7
8:58 pm-10:59 pm
Nonstop3h 01m
Seattle/Tacoma Intl
Sat 5/9
5:02 am-8:46 am
Nonstop2h 44m
$227
Colorado SpringsPortland
COS - PDX
COSPDX
Colorado Springs
Mon 5/11
11:55 am-4:00 pm
1 stop5h 05m
Portland
Wed 5/20
5:45 am-11:15 am
1 stop4h 30m
$227
DenverSeattle
DEN - SEA
DENSEA
Denver Intl
Wed 5/6
8:30 pm-10:30 pm
Nonstop3h 00m
Seattle/Tacoma Intl
Sat 5/9
11:15 am-8:00 pm
2 stops7h 45m
$232
DenverPortland
DEN - PDX
DENPDX
Denver Intl
Wed 5/20
8:00 am-9:49 am
Nonstop2h 49m
Portland
Fri 5/29
5:50 pm-11:59 pm
1 stop5h 09m
$237
DenverPortland
DEN - PDX
DENPDX
Denver Intl
Fri 5/15
5:58 pm-7:46 pm
Nonstop2h 48m
Portland
Sun 5/17
7:17 am-11:06 am
Nonstop2h 49m
$237
DenverPortland
DEN - PDX
DENPDX
Denver Intl
Wed 5/13
7:55 am-12:33 pm
1 stop5h 38m
Portland
Sat 5/16
3:30 pm-11:52 pm
1 stop7h 22m
$237
DenverSeattle
DEN - SEA
DENSEA
Denver Intl
Thu 5/7
3:00 pm-8:05 pm
1 stop6h 05m
Seattle/Tacoma Intl
Sat 5/9
6:40 am-1:55 pm
1 stop6h 15m
$247
DenverPortland
DEN - PDX
DENPDX
Denver Intl
Fri 6/19
7:05 pm-8:50 pm
Nonstop2h 45m
Portland
Tue 6/23
6:04 pm-9:40 pm
Nonstop2h 36m
$247
Showing 1-10 of 60 resultsSorted by cheapest first
Best time to book a flight from Colorado to Washington
Have a flexible travel schedule? Discover the best time to fly to Washington from Colorado with our price prediction graph.
DEN-SEA
DEN-PDX
DEN-PSC
DRO-PDX
COS-PDX
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 Colorado to Washington
USCO-USWA
DEN-SEA
DEN-PDX
DEN-PSC
DRO-PDX
What is the cheapest month to book a flight from Colorado to State of Washington?
Currently, August is the cheapest month in which you can book a flight from Colorado to State of Washington (average of $194). Flying from Colorado to State of Washington in January is currently the most expensive (average of $453). 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 CO to WA?
Find hourly flight availability from Colorado to Washington. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated April 18, 2026.
It’s optimal to fly from Colorado to State of Washington in the evening. By choosing this option you can save up to 24% on the cost of your flight, compared to a flight at noon.
What is the cheapest day to fly from Colorado to State of Washington?
Use this chart to determine the cheapest time to fly round-trip from Colorado to Washington. Price data was last updated on April 11, 2026.
Travelers seeking maximum savings on their Colorado to State of Washington flight should consider departing on Saturday mornings when fares are most often at their lowest. Monday at noon flights should be avoided if possible as fares are typically the most expensive at this time.
Weekly flight availability from Colorado to State of Washington
Explore weekly flight availability from Colorado to Washington. 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 April 18, 2026.
The most flights from USCO to USWA are scheduled on a Friday (37 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (20 on average).
How much does it cost to fly round-trip from Colorado to State of Washington?
Reviews of airlines servicing Washington
Get insights into the airlines that provide service to Washington. 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 Washington. Reviews last updated April 18, 2026.
Peruse reviews from past customers who have flown with Southwest,Alaska Airlines, andDelta from Colorado to Washington to help guide your decision. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Food
7.0
Boarding
8.1
Entertainment
7.5
Crew
8.6
Overall
8.0
Comfort
8.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Food
7.0
Boarding
8.1
Entertainment
7.5
Crew
8.6
Overall
8.0
Comfort
8.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Food
7.0
Boarding
8.1
Entertainment
7.5
Crew
8.6
Overall
8.0
Comfort
8.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Food
7.0
Boarding
8.1
Entertainment
7.5
Crew
8.6
Overall
8.0
Comfort
8.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Food
7.0
Boarding
8.1
Entertainment
7.5
Crew
8.6
Overall
8.0
Comfort
8.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Food
7.0
Boarding
8.1
Entertainment
7.5
Crew
8.6
Overall
8.0
Comfort
8.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Related info for your journey
Find useful and relevant information for your journey from Colorado to Washington. 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 Colorado to Washington
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to Washington by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Colorado to Washington by cabin class
Find flights from Colorado to Washington, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Colorado and Washington flights
Browse other Colorado and Washington flight options. Last updated on April 18, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Find a return flight route from Washington
Find the right flight back to Colorado after your stay in Washington
Colorado to Washington flights
Consider these flights traveling from Colorado to Washington.
Top 7 airlines flying from Colorado to Washington
Discover the top 7 airlines that operate flights from Colorado to Washington. 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 April 18, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$55 | Average$163 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$88 | Average$326 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$107 | Average$267 | FlexibilityNo cancel fee | On-time85% | |
| Cheapest$116 | Average$392 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$117 | Average$345 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$126 | Average$400 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$186 | Average$429 | FlexibilityNo cancel fee | On-time71% |