$69+ 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 8/12. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — SEA
May 29 — Jun 51
Round-trip
1 adult, Economy
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Find cheap flights from Colorado to Washington with Cheapflights
1. Tell us where you want to go
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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 29, 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 29, 2026.
This Kiwi.com deal was found by Cheapflights users on 4/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/37:20 am
DEN
- SEA
1 stop12h 15m
Frontier
Sun 6/77:50 pm
SEA
- DEN
Nonstop3h 04m
Frontier
Deal found 4/24![Frontier logo]()
$110
This Super.com deal was found by Cheapflights users on 4/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/117:50 am
DEN
- SEA
Nonstop2h 59m
Frontier
Wed 5/137:50 pm
SEA
- DEN
Nonstop3h 04m
Frontier
Deal found 4/24![Frontier logo]()
$112
This Kiwi.com deal was found by Cheapflights users on 4/26. Clicking the “Pick Dates” 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 5/197:20 am
DEN
- SEA
1 stop12h 15m
Frontier
Wed 5/207:50 pm
SEA
- DEN
Nonstop3h 04m
Frontier
Deal found 4/26![Frontier logo]()
$113
This Kiwi.com deal was found by Cheapflights users on 4/27. Clicking the “Pick Dates” 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 6/78:00 am
DEN
- SEA
Nonstop3h 06m
Frontier
Sun 6/77:50 pm
SEA
- DEN
Nonstop3h 04m
Frontier
Deal found 4/27![Frontier logo]()
$116
This Super.com deal was found by Cheapflights users on 4/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/127:50 am
DEN
- SEA
Nonstop2h 59m
Frontier
Wed 5/137:50 pm
SEA
- DEN
Nonstop3h 04m
Frontier
Deal found 4/24![Frontier logo]()
$120
This Kiwi.com deal was found by Cheapflights users on 4/26. Clicking the “Pick Dates” 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 5/197:20 am
DEN
- SEA
1 stop12h 15m
Frontier
Sun 5/247:50 pm
SEA
- DEN
Nonstop3h 04m
Frontier
Deal found 4/26![Frontier logo]()
$121
This Super.com deal was found by Cheapflights users on 4/27. Clicking the “Pick Dates” 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 5/197:50 am
DEN
- SEA
Nonstop2h 59m
Frontier
Wed 5/277:50 pm
SEA
- DEN
Nonstop3h 04m
Frontier
Deal found 4/27![Frontier logo]()
$122
This Frontier deal was found by Cheapflights users on 4/26. Clicking the “Pick Dates” 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.
Sun 5/248:41 am
DEN
- SEA
1 stop11h 24m
Frontier
Fri 5/297:50 pm
SEA
- DEN
Nonstop3h 04m
Frontier
Deal found 4/26![Frontier logo]()
$124
This Kiwi.com deal was found by Cheapflights users on 4/27. Clicking the “Pick Dates” 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 5/298:00 am
DEN
- SEA
Nonstop3h 06m
Frontier
Mon 6/18:20 pm
SEA
- DEN
1 stop6h 05m
Frontier
Deal found 4/27![Frontier logo]()
$125
This Cheapflightsfares deal was found by Cheapflights users on 4/27. Clicking the “Pick Dates” 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 6/97:45 am
DEN
- SEA
Nonstop3h 03m
Frontier
Sat 6/137:41 pm
SEA
- DEN
Nonstop2h 55m
Frontier
Deal found 4/27![Frontier logo]()
$126
This Cheapflightsfares deal was found by Cheapflights users on 4/26. Clicking the “Pick Dates” 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 am
DEN
- SEA
Nonstop2h 59m
Frontier
Fri 5/297:50 pm
SEA
- DEN
Nonstop3h 04m
Frontier
Deal found 4/26![Frontier logo]()
$127
This Kiwi.com deal was found by Cheapflights users on 4/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/278:00 am
DEN
- PDX
Nonstop2h 49m
Multiple Airlines
Sat 5/3012:35 pm
PDX
- DEN
Nonstop2h 48m
Multiple Airlines
Deal found 4/24![Multiple Airlines logo]()
$132
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 29, 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 29, 2026.
This Southwest deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” 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 6/75:35 am
COS
- PDX
1 stop4h 55m
Southwest
Wed 6/105:55 pm
PDX
- COS
1 stop4h 50m
Southwest
Deal found 4/28![Southwest logo]()
$217
This Delta deal was found by Cheapflights users on 4/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/236:20 pm
COS
- SEA
1 stop6h 39m
Delta
Tue 6/307:15 am
SEA
- COS
2 stops9h 25m
Delta
Deal found 4/24![Delta logo]()
$222
This Alaska Airlines deal was found by Cheapflights users on 4/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/256:00 am
DEN
- PDX
1 stop8h 43m
Alaska Airlines
Tue 7/286:04 pm
PDX
- DEN
Nonstop2h 36m
Alaska Airlines
Deal found 4/25![Alaska Airlines logo]()
$257
This United Airlines deal was found by Cheapflights users on 4/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/177:24 pm
DEN
- PSC
Nonstop2h 28m
United Airlines
Sun 7/195:14 am
PSC
- DEN
Nonstop2h 22m
United Airlines
Deal found 4/24![United Airlines logo]()
$269
This American Airlines deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” 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 5/236:00 am
DRO
- SEA
1 stop5h 33m
American Airlines
Thu 5/2812:49 am
SEA
- DRO
1 stop8h 05m
American Airlines
Deal found 4/29![American Airlines logo]()
$443
This Delta deal was found by Cheapflights users on 4/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/286:05 am
DEN
- SEA
Nonstop3h 04m
Delta
Sun 5/317:55 am
SEA
- DEN
Nonstop2h 59m
Delta
Deal found 4/24![Delta logo]()
$237
This Southwest deal was found by Cheapflights users on 4/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/125:20 pm
COS
- SEA
1 stop7h 05m
Southwest
Mon 8/176:15 am
SEA
- COS
1 stop7h 00m
Southwest
Deal found 4/24![Southwest logo]()
$256
This Delta deal was found by Cheapflights users on 4/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/38:15 am
COS
- SEA
1 stop8h 06m
Delta
Sun 6/79:30 am
SEA
- COS
1 stop7h 10m
Delta
Deal found 4/25![Delta logo]()
$237
This United Airlines deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” 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 5/275:30 am
COS
- PDX
1 stop5h 17m
United Airlines
Wed 6/36:50 pm
PDX
- COS
1 stop4h 09m
United Airlines
Deal found 4/28![United Airlines logo]()
$308
This Southwest deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” 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 9/199:15 am
DEN
- SEA
1 stop5h 25m
Southwest
Sat 9/265:00 am
SEA
- DEN
1 stop8h 05m
Southwest
Deal found 4/28![Southwest logo]()
$282
This Alaska Airlines deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” 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 6/37:51 pm
DEN
- GEG
1 stop26h 54m
Alaska Airlines
Fri 6/57:01 am
GEG
- DEN
1 stop15h 48m
Alaska Airlines
Deal found 4/28![Alaska Airlines logo]()
$314
This Delta deal was found by Cheapflights users on 4/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/116:20 pm
COS
- SEA
1 stop6h 39m
Delta
Tue 6/1612:35 pm
SEA
- COS
2 stops9h 07m
Delta
Deal found 4/27![Delta logo]()
$261
This United Airlines deal was found by Cheapflights users on 4/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/97:20 pm
DEN
- PSC
Nonstop2h 33m
United Airlines
Wed 5/135:00 am
PSC
- DEN
Nonstop2h 29m
United Airlines
Deal found 4/24![United Airlines logo]()
$309
This Southwest deal was found by Cheapflights users on 4/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/39:05 pm
COS
- PDX
1 stop5h 15m
Southwest
Sat 8/89:00 am
PDX
- COS
1 stop10h 05m
Southwest
Deal found 4/24![Southwest logo]()
$283
This Alaska Airlines deal was found by Cheapflights users on 4/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/158:00 am
DEN
- SEA
1 stop4h 43m
Alaska Airlines
Tue 8/183:55 pm
SEA
- DEN
1 stop4h 45m
Alaska Airlines
Deal found 4/25![Alaska Airlines logo]()
$315
This Delta deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” 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 6/2912:45 pm
DEN
- PDX
1 stop4h 34m
Delta
Mon 7/65:50 pm
PDX
- DEN
1 stop4h 56m
Delta
Deal found 4/28![Delta logo]()
$267
This Southwest deal was found by Cheapflights users on 4/27. Clicking the “Pick Dates” 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 7/18:55 pm
DEN
- PDX
Nonstop2h 40m
Southwest
Wed 7/87:40 pm
PDX
- DEN
Nonstop2h 25m
Southwest
Deal found 4/27![Southwest logo]()
$287
This Delta deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” 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 stop5h 09m
Delta
Fri 7/105:50 pm
PDX
- DEN
1 stop4h 54m
Delta
Deal found 4/28![Delta logo]()
$267
This United Airlines deal was found by Cheapflights users on 4/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/89:20 pm
DEN
- PDX
Nonstop2h 43m
United Airlines
Tue 7/145:00 am
PDX
- DEN
Nonstop2h 31m
United Airlines
Deal found 4/25![United Airlines logo]()
$327
This Alaska Airlines deal was found by Cheapflights users on 4/26. Clicking the “Pick Dates” 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 7/2912:05 pm
GJT
- SEA
1 stop8h 01m
Alaska Airlines
Tue 8/189:59 am
SEA
- GJT
1 stop7h 27m
Alaska Airlines
Deal found 4/26![Alaska Airlines logo]()
$351
This Delta deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” 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 6/296:30 am
DEN
- PDX
1 stop6h 12m
Delta
Thu 7/93:30 pm
PDX
- DEN
1 stop7h 14m
Delta
Deal found 4/28![Delta logo]()
$267
This Southwest deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” 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 6/47:55 pm
COS
- SEA
1 stop5h 55m
Southwest
Mon 6/85:35 pm
SEA
- COS
1 stop6h 40m
Southwest
Deal found 4/28![Southwest logo]()
$295
This United Airlines deal was found by Cheapflights users on 4/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/66:10 pm
GJT
- SEA
1 stop6h 00m
United Airlines
Thu 8/132:26 pm
SEA
- GJT
1 stop6h 40m
United Airlines
Deal found 4/24![United Airlines logo]()
$339
This Alaska Airlines deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” 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 6/278:00 am
DEN
- PAE
1 stop4h 53m
Alaska Airlines
Sat 7/412:33 pm
PAE
- DEN
1 stop4h 36m
Alaska Airlines
Deal found 4/28![Alaska Airlines logo]()
$355
This Southwest deal was found by Cheapflights users on 4/27. Clicking the “Pick Dates” 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 6/22:50 pm
DEN
- SEA
2 stops7h 10m
Southwest
Fri 6/51:30 pm
SEA
- DEN
1 stop8h 35m
Southwest
Deal found 4/27![Southwest logo]()
$298
This Delta deal was found by Cheapflights users on 4/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/41:10 pm
DEN
- PDX
1 stop7h 14m
Delta
Wed 6/105:50 pm
PDX
- DEN
1 stop4h 56m
Delta
Deal found 4/26![Delta logo]()
$282
This United Airlines deal was found by Cheapflights users on 4/27. Clicking the “Pick Dates” 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 5/125:30 am
GJT
- SEA
1 stop5h 10m
United Airlines
Sat 5/165:02 am
SEA
- GJT
1 stop4h 41m
United Airlines
Deal found 4/27![United Airlines logo]()
$351
This Alaska Airlines deal was found by Cheapflights users on 4/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/248:00 am
DEN
- PAE
1 stop4h 53m
Alaska Airlines
Wed 7/112:33 pm
PAE
- DEN
1 stop4h 36m
Alaska Airlines
Deal found 4/25![Alaska Airlines logo]()
$355
This Southwest deal was found by Cheapflights users on 4/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/304:35 pm
DEN
- SEA
1 stop6h 55m
Southwest
Mon 6/17:20 am
SEA
- DEN
2 stops9h 10m
Southwest
Deal found 4/25![Southwest logo]()
$302
This Delta deal was found by Cheapflights users on 4/27. Clicking the “Pick Dates” 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 5/1611:55 am
COS
- PDX
1 stop5h 01m
Delta
Sat 5/305:45 am
PDX
- COS
1 stop4h 30m
Delta
Deal found 4/27![Delta logo]()
$287
Last-minute flights from Colorado to WashingtonDiscover last-minute flight deals from Colorado to Washington. Data last updated April 29, 2026 and is based on user searches.
Discover last-minute flight deals from Colorado to Washington. Data last updated April 29, 2026 and is based on user searches.
This Super.com deal was found by Cheapflights users on 4/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/77:50 am
DEN
- SEA
Nonstop2h 59m
Frontier
Tue 5/127:50 pm
SEA
- DEN
Nonstop3h 04m
Frontier
Deal found 4/24![Frontier logo]()
$131
This Super.com deal was found by Cheapflights users on 4/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/97:50 am
DEN
- SEA
Nonstop2h 59m
Frontier
Fri 5/157:50 pm
SEA
- DEN
Nonstop3h 04m
Frontier
Deal found 4/25![Frontier logo]()
$147
This Cheapflightsfares deal was found by Cheapflights users on 4/26. Clicking the “Pick Dates” 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 5/1310:39 pm
DEN
- PDX
1 stop14h 11m
Frontier
Sun 5/1712:35 pm
PDX
- DEN
Nonstop2h 48m
Frontier
Deal found 4/26![Frontier logo]()
$143
This Cheapflightsfares deal was found by Cheapflights users on 4/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/207:01 pm
DEN
- PDX
1 stop16h 19m
Frontier
Sat 5/235:31 pm
PDX
- DEN
1 stop6h 07m
Frontier
Deal found 4/25![Frontier logo]()
$139
This Kiwi.com deal was found by Cheapflights users on 4/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com 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
Tue 5/265:46 pm
PDX
- DEN
Nonstop2h 52m
Frontier
Deal found 4/24![Frontier logo]()
$147
This Kiwi.com deal was found by Cheapflights users on 4/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/223:00 pm
DEN
- PDX
Nonstop2h 46m
Frontier
Sat 5/235:31 pm
PDX
- DEN
1 stop6h 07m
Frontier
Deal found 4/24![Frontier logo]()
$137
This Cheapflightsfares deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” 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 5/223:00 pm
DEN
- PDX
Nonstop2h 46m
Frontier
Sat 5/3012:35 pm
PDX
- DEN
Nonstop2h 48m
Frontier
Deal found 4/29![Frontier logo]()
$144
This Frontier deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” 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 5/223:00 pm
DEN
- PDX
Nonstop2h 46m
Frontier
Tue 5/265:46 pm
PDX
- DEN
Nonstop2h 52m
Frontier
Deal found 4/28![Frontier logo]()
$145
This Cheapflightsfares deal was found by Cheapflights users on 4/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/232:00 pm
DEN
- PDX
1 stop22h 50m
Frontier
Tue 5/265:46 pm
PDX
- DEN
Nonstop2h 52m
Frontier
Deal found 4/25![Frontier logo]()
$138
This Kiwi.com deal was found by Cheapflights users on 4/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/268:00 am
DEN
- PDX
Nonstop2h 49m
Multiple Airlines
Sat 6/612:35 pm
PDX
- DEN
Nonstop2h 48m
Multiple Airlines
Deal found 4/24![Multiple Airlines logo]()
$150
This Kiwi.com deal was found by Cheapflights users on 4/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/278:00 am
DEN
- PDX
Nonstop2h 49m
Multiple Airlines
Sat 5/3012:35 pm
PDX
- DEN
Nonstop2h 48m
Multiple Airlines
Deal found 4/24![Multiple Airlines logo]()
$132
This Cheapflightsfares deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” 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 5/283:00 pm
DEN
- PDX
Nonstop2h 46m
Frontier
Tue 6/25:46 pm
PDX
- DEN
Nonstop2h 52m
Frontier
Deal found 4/28![Frontier logo]()
$142
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 29, 2026.
Search for one-way flight options from Colorado to Washington. Find affordable one-way fares based on user searches. Data last updated April 29, 2026.
This Frontier deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” 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 8/1210:14 am
DEN
- GEG
Nonstop2h 23m
Frontier
Deal found 4/29![Frontier logo]()
$69
This Super.com deal was found by Cheapflights users on 4/27. Clicking the “Pick Dates” 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 6/237:45 am
DEN
- SEA
Nonstop3h 03m
Frontier
Deal found 4/27![Frontier logo]()
$82
This Kiwi.com deal was found by Cheapflights users on 4/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/2810:39 pm
DEN
- PDX
1 stop14h 11m
Frontier
Deal found 4/25![Frontier logo]()
$82
This Cheapflightsfares deal was found by Cheapflights users on 4/27. Clicking the “Pick Dates” 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 6/2412:14 pm
DEN
- SEA
Nonstop3h 04m
Frontier
Deal found 4/27![Frontier logo]()
$83
This Super.com deal was found by Cheapflights users on 4/27. Clicking the “Pick Dates” 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 5/248:41 am
DEN
- SEA
1 stop11h 24m
Frontier
Deal found 4/27![Frontier logo]()
$85
This Kiwi.com deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” 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 6/157:45 am
DEN
- SEA
Nonstop3h 03m
Frontier
Deal found 4/28![Frontier logo]()
$88
This Frontier deal was found by Cheapflights users on 4/27. Clicking the “Pick Dates” 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 5/117:50 am
DEN
- SEA
Nonstop2h 59m
Frontier
Deal found 4/27![Frontier logo]()
$89
This Super.com deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” 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 6/67:00 am
DEN
- PDX
1 stop5h 50m
Frontier
Deal found 4/28![Frontier logo]()
$89
This Cheapflightsfares deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” 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 6/17:00 am
DEN
- PDX
1 stop5h 50m
Frontier
Deal found 4/28![Frontier logo]()
$90
This Super.com deal was found by Cheapflights users on 4/27. Clicking the “Pick Dates” 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 5/127:50 am
DEN
- SEA
Nonstop2h 59m
Frontier
Deal found 4/27![Frontier logo]()
$93
This Super.com deal was found by Cheapflights users on 4/26. Clicking the “Pick Dates” 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 5/223:00 pm
DEN
- PDX
Nonstop2h 46m
Frontier
Deal found 4/26![Frontier logo]()
$93
This Kiwi.com deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” 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 6/133:10 pm
DEN
- PDX
Nonstop2h 47m
Frontier
Deal found 4/28![Frontier logo]()
$94
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 29, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $110 (Kiwi.com) |
One-way from | $69 (Frontier) |
Popular in | June |
Cheapest in | January |
Average price | $217 |
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 29, 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
Colorado SpringsPortland
COS - PDX
COSPDX
Colorado Springs
Sun 6/7
5:35 am-9:30 am
1 stop4h 55m
Portland
Wed 6/10
5:55 pm-11:45 pm
1 stop4h 50m
$217
Colorado SpringsSeattle
COS - SEA
COSSEA
Colorado Springs
Tue 6/23
6:20 pm-11:59 pm
1 stop6h 39m
Seattle/Tacoma Intl
Tue 6/30
7:15 am-5:40 pm
2 stops9h 25m
$222
DenverSeattle
DEN - SEA
DENSEA
Denver Intl
Thu 5/28
6:05 am-8:09 am
Nonstop3h 04m
Seattle/Tacoma Intl
Sun 5/31
7:55 am-11:54 am
Nonstop2h 59m
$237
Colorado SpringsSeattle
COS - SEA
COSSEA
Colorado Springs
Wed 6/3
8:15 am-3:21 pm
1 stop8h 06m
Seattle/Tacoma Intl
Sun 6/7
9:30 am-5:40 pm
1 stop7h 10m
$237
Colorado SpringsSeattle
COS - SEA
COSSEA
Colorado Springs
Wed 8/12
5:20 pm-11:25 pm
1 stop7h 05m
Seattle/Tacoma Intl
Mon 8/17
6:15 am-2:15 pm
1 stop7h 00m
$256
DenverPortland
DEN - PDX
DENPDX
Denver Intl
Sat 7/25
6:00 am-1:43 pm
1 stop8h 43m
Portland
Tue 7/28
6:04 pm-9:40 pm
Nonstop2h 36m
$257
Colorado SpringsSeattle
COS - SEA
COSSEA
Colorado Springs
Thu 6/11
6:20 pm-11:59 pm
1 stop6h 39m
Seattle/Tacoma Intl
Tue 6/16
12:35 pm-10:42 pm
2 stops9h 07m
$261
DenverPortland
DEN - PDX
DENPDX
Denver Intl
Mon 6/29
12:45 pm-4:19 pm
1 stop4h 34m
Portland
Mon 7/6
5:50 pm-11:46 pm
1 stop4h 56m
$267
DenverPortland
DEN - PDX
DENPDX
Denver Intl
Wed 7/1
6:30 am-10:39 am
1 stop5h 09m
Portland
Fri 7/10
5:50 pm-11:44 pm
1 stop4h 54m
$267
DenverPortland
DEN - PDX
DENPDX
Denver Intl
Mon 6/29
6:30 am-11:42 am
1 stop6h 12m
Portland
Thu 7/9
3:30 pm-11:44 pm
1 stop7h 14m
$267
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
COS-PDX
COS-SEA
DEN-PSC
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
COS-PDX
COS-SEA
How far ahead should I book a flight from Colorado to State of Washington?
The best time to book flights from Colorado to State of Washington is 66 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.
What is the cheapest 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 29, 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 25, 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. Sunday 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 29, 2026.
The most flights from USCO to USWA are scheduled on a Wednesday (37 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (19 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 29, 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.
Crew
8.6
Boarding
8.1
Food
7.0
Comfort
8.0
Entertainment
7.5
Overall
8.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Crew
8.6
Boarding
8.1
Food
7.0
Comfort
8.0
Entertainment
7.5
Overall
8.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Crew
8.6
Boarding
8.1
Food
7.0
Comfort
8.0
Entertainment
7.5
Overall
8.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Crew
8.6
Boarding
8.1
Food
7.0
Comfort
8.0
Entertainment
7.5
Overall
8.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Crew
8.6
Boarding
8.1
Food
7.0
Comfort
8.0
Entertainment
7.5
Overall
8.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Crew
8.6
Boarding
8.1
Food
7.0
Comfort
8.0
Entertainment
7.5
Overall
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.
Browse thousands of different options on Cheapflights for your next trip
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
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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 29, 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 29, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$55 | Average$165 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$88 | Average$322 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$107 | Average$268 | FlexibilityNo cancel fee | On-time85% | |
| Cheapest$116 | Average$391 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$117 | Average$344 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$126 | Average$387 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$200 | Average$466 | FlexibilityNo cancel fee | On-time71% |