$52+ 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 4/15. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — SEA
Apr 25 — May 21
Round-trip
1 adult, Economy
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Find cheap flights from Colorado to Washington with Cheapflights
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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 March 26, 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 March 26, 2026.
This Super.com deal was found by Cheapflights users on 3/24. 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.
Wed 4/227:15 am
DEN
- SEA
Nonstop3h 12m
Frontier
Wed 5/137:50 pm
SEA
- DEN
Nonstop3h 04m
Frontier
Deal found 3/24![Frontier logo]()
$79
This Cheapflightsfares deal was found by Cheapflights users on 3/25. 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.
Tue 4/287:15 am
DEN
- SEA
Nonstop3h 12m
Frontier
Tue 5/57:50 pm
SEA
- DEN
Nonstop3h 04m
Frontier
Deal found 3/25![Frontier logo]()
$80
This Frontier deal was found by Cheapflights users on 3/25. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/157:15 am
DEN
- SEA
Nonstop3h 12m
Frontier
Thu 4/167:12 pm
SEA
- DEN
Nonstop2h 47m
Frontier
Deal found 3/25![Frontier logo]()
$81
This Frontier deal was found by Cheapflights users on 3/24. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/147:15 am
DEN
- SEA
Nonstop3h 12m
Frontier
Wed 4/158:07 pm
SEA
- DEN
Nonstop2h 52m
Frontier
Deal found 3/24![Frontier logo]()
$82
This Frontier deal was found by Cheapflights users on 3/24. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/217:15 am
DEN
- SEA
Nonstop3h 12m
Frontier
Sat 4/257:12 pm
SEA
- DEN
Nonstop2h 47m
Frontier
Deal found 3/24![Frontier logo]()
$85
This iWofly deal was found by Cheapflights users on 3/25. 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 iWofly is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/27:15 am
DEN
- SEA
Nonstop3h 12m
Frontier
Tue 5/57:50 pm
SEA
- DEN
Nonstop3h 04m
Frontier
Deal found 3/25![Frontier logo]()
$86
This Super.com deal was found by Cheapflights users on 3/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/157:15 am
DEN
- SEA
Nonstop3h 12m
Frontier
Mon 4/207:12 pm
SEA
- DEN
Nonstop2h 47m
Frontier
Deal found 3/25![Frontier logo]()
$92
This Frontier deal was found by Cheapflights users on 3/24. 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 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
Sat 5/27:12 pm
SEA
- DEN
Nonstop2h 47m
Frontier
Deal found 3/24![Frontier logo]()
$93
This Frontier deal was found by Cheapflights users on 3/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure 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
Sat 5/27:12 pm
SEA
- DEN
Nonstop2h 47m
Frontier
Deal found 3/23![Frontier logo]()
$94
This Cheapflightsfares deal was found by Cheapflights users on 3/25. 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.
Tue 4/147:15 am
DEN
- SEA
Nonstop3h 12m
Frontier
Mon 4/207:12 pm
SEA
- DEN
Nonstop2h 47m
Frontier
Deal found 3/25![Frontier logo]()
$95
This eDestinos deal was found by Cheapflights users on 3/24. 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 eDestinos is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/2312:51 pm
DEN
- SEA
Nonstop3h 14m
Frontier
Thu 4/307:12 pm
SEA
- DEN
Nonstop2h 47m
Frontier
Deal found 3/24![Frontier logo]()
$96
This Cheapflightsfares deal was found by Cheapflights users on 3/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/259:49 am
DEN
- PDX
Nonstop2h 53m
Frontier
Tue 4/2812:38 pm
PDX
- DEN
Nonstop2h 40m
Frontier
Deal found 3/22![Frontier logo]()
$107
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 March 26, 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 March 26, 2026.
This Delta deal was found by Cheapflights users on 3/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/136:19 pm
DEN
- PDX
1 stop6h 25m
Delta
Sat 5/163:30 pm
PDX
- DEN
1 stop7h 22m
Delta
Deal found 3/24![Delta logo]()
$196
This Southwest deal was found by Cheapflights users on 3/25. 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 4/251:15 pm
DEN
- PDX
Nonstop2h 40m
Southwest
Tue 4/286:30 am
PDX
- DEN
2 stops7h 35m
Southwest
Deal found 3/25![Southwest logo]()
$204
This Alaska Airlines deal was found by Cheapflights users on 3/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/286:00 am
DEN
- SEA
Nonstop3h 03m
Alaska Airlines
Sat 5/210:22 am
SEA
- DEN
1 stop7h 03m
Alaska Airlines
Deal found 3/22![Alaska Airlines logo]()
$257
This United Airlines deal was found by Cheapflights users on 3/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/218:05 am
DEN
- PDX
Nonstop2h 42m
United Airlines
Mon 5/255:00 am
PDX
- DEN
Nonstop2h 31m
United Airlines
Deal found 3/21![United Airlines logo]()
$262
This Southwest deal was found by Cheapflights users on 3/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/54:05 pm
COS
- PDX
1 stop6h 55m
Southwest
Tue 5/125:30 am
PDX
- COS
1 stop6h 05m
Southwest
Deal found 3/21![Southwest logo]()
$217
This Delta deal was found by Cheapflights users on 3/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/171:20 pm
DEN
- SEA
Nonstop2h 55m
Delta
Mon 4/208:00 pm
SEA
- DEN
Nonstop2h 50m
Delta
Deal found 3/21![Delta logo]()
$237
This Southwest deal was found by Cheapflights users on 3/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/305:10 pm
DEN
- PDX
1 stop5h 35m
Southwest
Sat 6/61:10 pm
PDX
- DEN
2 stops8h 25m
Southwest
Deal found 3/22![Southwest logo]()
$218
This Delta deal was found by Cheapflights users on 3/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/86:35 pm
DEN
- SEA
Nonstop3h 02m
Delta
Sun 5/107:50 am
SEA
- DEN
Nonstop2h 59m
Delta
Deal found 3/22![Delta logo]()
$237
This Alaska Airlines deal was found by Cheapflights users on 3/25. 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.
Thu 4/301:02 pm
DEN
- GEG
1 stop10h 18m
Alaska Airlines
Mon 5/47:27 am
GEG
- DEN
1 stop27h 39m
Alaska Airlines
Deal found 3/25![Alaska Airlines logo]()
$266
This Southwest deal was found by Cheapflights users on 3/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/56:50 pm
COS
- SEA
1 stop6h 05m
Southwest
Tue 5/1211:35 am
SEA
- COS
2 stops8h 45m
Southwest
Deal found 3/21![Southwest logo]()
$222
This Delta deal was found by Cheapflights users on 3/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/1412:30 pm
DEN
- PDX
1 stop6h 38m
Delta
Sat 4/183:35 pm
PDX
- DEN
1 stop7h 15m
Delta
Deal found 3/23![Delta logo]()
$237
This United Airlines deal was found by Cheapflights users on 3/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/281:40 pm
DEN
- PDX
1 stop5h 27m
United Airlines
Sat 5/27:15 am
PDX
- DEN
1 stop6h 44m
United Airlines
Deal found 3/23![United Airlines logo]()
$288
This Southwest deal was found by Cheapflights users on 3/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/24:15 pm
DEN
- SEA
Nonstop3h 00m
Southwest
Mon 5/45:30 am
SEA
- DEN
Nonstop2h 35m
Southwest
Deal found 3/23![Southwest logo]()
$226
This Delta deal was found by Cheapflights users on 3/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/206:05 am
DEN
- PDX
1 stop6h 34m
Delta
Mon 5/255:45 am
PDX
- DEN
1 stop5h 00m
Delta
Deal found 3/21![Delta logo]()
$252
This United Airlines deal was found by Cheapflights users on 3/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/296:00 am
COS
- SEA
1 stop4h 46m
United Airlines
Sat 5/25:05 am
SEA
- COS
1 stop6h 21m
United Airlines
Deal found 3/22![United Airlines logo]()
$307
This Southwest deal was found by Cheapflights users on 3/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/2511:40 am
DEN
- SEA
2 stops9h 55m
Southwest
Tue 4/286:50 am
SEA
- DEN
2 stops7h 15m
Southwest
Deal found 3/23![Southwest logo]()
$232
This Alaska Airlines deal was found by Cheapflights users on 3/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/87:06 pm
DEN
- GEG
1 stop28h 14m
Alaska Airlines
Mon 5/119:55 am
GEG
- DEN
1 stop6h 16m
Alaska Airlines
Deal found 3/21![Alaska Airlines logo]()
$330
This United Airlines deal was found by Cheapflights users on 3/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/296:00 am
COS
- PDX
1 stop4h 49m
United Airlines
Sat 5/25:00 am
PDX
- COS
1 stop5h 05m
United Airlines
Deal found 3/24![United Airlines logo]()
$307
This Delta deal was found by Cheapflights users on 3/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/136:27 pm
DEN
- PDX
1 stop6h 26m
Delta
Mon 4/203:35 pm
PDX
- DEN
1 stop7h 15m
Delta
Deal found 3/22![Delta logo]()
$257
This Southwest deal was found by Cheapflights users on 3/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/2511:40 am
DEN
- SEA
2 stops9h 55m
Southwest
Mon 4/2711:40 am
SEA
- DEN
1 stop10h 25m
Southwest
Deal found 3/24![Southwest logo]()
$247
This Alaska Airlines deal was found by Cheapflights users on 3/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/301:02 pm
DEN
- GEG
1 stop10h 18m
Alaska Airlines
Sun 5/37:27 am
GEG
- DEN
1 stop27h 39m
Alaska Airlines
Deal found 3/22![Alaska Airlines logo]()
$343
This United Airlines deal was found by Cheapflights users on 3/24. 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 5/231:30 pm
DRO
- SEA
2 stops9h 29m
United Airlines
Fri 5/295:00 am
SEA
- DRO
1 stop6h 28m
United Airlines
Deal found 3/24![United Airlines logo]()
$314
This Delta deal was found by Cheapflights users on 3/25. 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.
Tue 6/236:30 am
DEN
- PDX
1 stop5h 09m
Delta
Thu 6/255:30 am
PDX
- DEN
1 stop5h 48m
Delta
Deal found 3/25![Delta logo]()
$267
This Alaska Airlines deal was found by Cheapflights users on 3/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure 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 03m
Alaska Airlines
Tue 8/187:07 am
SEA
- GJT
2 stops16h 13m
Alaska Airlines
Deal found 3/21![Alaska Airlines logo]()
$345
This Southwest deal was found by Cheapflights users on 3/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/294:25 pm
DEN
- PDX
2 stops7h 15m
Southwest
Sun 5/315:50 pm
PDX
- DEN
1 stop5h 05m
Southwest
Deal found 3/22![Southwest logo]()
$261
This United Airlines deal was found by Cheapflights users on 3/24. 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 5/291:33 pm
GJT
- SEA
2 stops9h 26m
United Airlines
Sat 6/65:00 am
SEA
- GJT
1 stop6h 31m
United Airlines
Deal found 3/24![United Airlines logo]()
$329
This Delta deal was found by Cheapflights users on 3/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/77:55 am
DEN
- PSC
1 stop7h 11m
Delta
Sat 5/95:30 pm
PSC
- DEN
1 stop5h 22m
Delta
Deal found 3/22![Delta logo]()
$289
This Southwest deal was found by Cheapflights users on 3/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/97:00 am
DEN
- SEA
1 stop6h 05m
Southwest
Thu 6/47:30 am
SEA
- DEN
2 stops7h 35m
Southwest
Deal found 3/23![Southwest logo]()
$263
This United Airlines deal was found by Cheapflights users on 3/24. 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 4/2511:15 am
DEN
- GEG
Nonstop2h 25m
United Airlines
Sat 5/21:41 pm
GEG
- DEN
Nonstop2h 22m
United Airlines
Deal found 3/24![United Airlines logo]()
$335
This Alaska Airlines deal was found by Cheapflights users on 3/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/296:45 am
DEN
- PSC
2 stops15h 57m
Alaska Airlines
Sat 5/21:21 pm
PSC
- DEN
1 stop7h 28m
Alaska Airlines
Deal found 3/20![Alaska Airlines logo]()
$377
Last-minute flights from Colorado to WashingtonDiscover last-minute flight deals from Colorado to Washington. Data last updated March 26, 2026 and is based on user searches.
Discover last-minute flight deals from Colorado to Washington. Data last updated March 26, 2026 and is based on user searches.
This Frontier deal was found by Cheapflights users on 3/24. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/147:15 am
DEN
- SEA
Nonstop3h 12m
Frontier
Wed 4/158:07 pm
SEA
- DEN
Nonstop2h 52m
Frontier
Deal found 3/24![Frontier logo]()
$82
This Cheapflightsfares deal was found by Cheapflights users on 3/25. 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.
Tue 4/147:15 am
DEN
- SEA
Nonstop3h 12m
Frontier
Mon 4/207:12 pm
SEA
- DEN
Nonstop2h 47m
Frontier
Deal found 3/25![Frontier logo]()
$95
This Frontier deal was found by Cheapflights users on 3/25. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/157:15 am
DEN
- SEA
Nonstop3h 12m
Frontier
Thu 4/167:12 pm
SEA
- DEN
Nonstop2h 47m
Frontier
Deal found 3/25![Frontier logo]()
$81
This Super.com deal was found by Cheapflights users on 3/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/157:15 am
DEN
- SEA
Nonstop3h 12m
Frontier
Mon 4/207:12 pm
SEA
- DEN
Nonstop2h 47m
Frontier
Deal found 3/25![Frontier logo]()
$92
This Frontier deal was found by Cheapflights users on 3/24. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/217:15 am
DEN
- SEA
Nonstop3h 12m
Frontier
Sat 4/257:12 pm
SEA
- DEN
Nonstop2h 47m
Frontier
Deal found 3/24![Frontier logo]()
$85
This Super.com deal was found by Cheapflights users on 3/24. 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.
Wed 4/227:15 am
DEN
- SEA
Nonstop3h 12m
Frontier
Wed 5/137:50 pm
SEA
- DEN
Nonstop3h 04m
Frontier
Deal found 3/24![Frontier logo]()
$79
This eDestinos deal was found by Cheapflights users on 3/24. 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 eDestinos is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/2312:51 pm
DEN
- SEA
Nonstop3h 14m
Frontier
Thu 4/307:12 pm
SEA
- DEN
Nonstop2h 47m
Frontier
Deal found 3/24![Frontier logo]()
$96
This Super.com deal was found by Cheapflights users on 3/25. 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.
Thu 4/2312:51 pm
DEN
- SEA
Nonstop3h 14m
Frontier
Sat 4/257:12 pm
SEA
- DEN
Nonstop2h 47m
Frontier
Deal found 3/25![Frontier logo]()
$97
This Cheapflightsfares deal was found by Cheapflights users on 3/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/259:49 am
DEN
- PDX
Nonstop2h 53m
Frontier
Tue 4/2812:38 pm
PDX
- DEN
Nonstop2h 40m
Frontier
Deal found 3/22![Frontier logo]()
$107
This Cheapflightsfares deal was found by Cheapflights users on 3/25. 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.
Tue 4/287:15 am
DEN
- SEA
Nonstop3h 12m
Frontier
Tue 5/57:50 pm
SEA
- DEN
Nonstop3h 04m
Frontier
Deal found 3/25![Frontier logo]()
$80
This Frontier deal was found by Cheapflights users on 3/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure 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
Sat 5/27:12 pm
SEA
- DEN
Nonstop2h 47m
Frontier
Deal found 3/23![Frontier logo]()
$94
This Frontier deal was found by Cheapflights users on 3/24. 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 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
Sat 5/27:12 pm
SEA
- DEN
Nonstop2h 47m
Frontier
Deal found 3/24![Frontier logo]()
$93
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 March 26, 2026.
Search for one-way flight options from Colorado to Washington. Find affordable one-way fares based on user searches. Data last updated March 26, 2026.
This Kiwi.com deal was found by Cheapflights users on 3/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/157:15 am
DEN
- SEA
Nonstop3h 12m
Frontier
Deal found 3/23![Frontier logo]()
$52
This Kiwi.com deal was found by Cheapflights users on 3/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/147:15 am
DEN
- SEA
Nonstop3h 12m
Frontier
Deal found 3/23![Frontier logo]()
$53
This Frontier deal was found by Cheapflights users on 3/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/217:15 am
DEN
- SEA
Nonstop3h 12m
Frontier
Deal found 3/23![Frontier logo]()
$54
This Kiwi.com deal was found by Cheapflights users on 3/25. 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 5/147:50 am
DEN
- SEA
Nonstop2h 59m
Frontier
Deal found 3/25![Frontier logo]()
$61
This Super.com deal was found by Cheapflights users on 3/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/109:10 am
DEN
- PDX
Nonstop2h 53m
Frontier
Deal found 3/21![Frontier logo]()
$61
This Super.com deal was found by Cheapflights users on 3/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/47:15 am
DEN
- SEA
Nonstop3h 12m
Frontier
Deal found 3/23![Frontier logo]()
$62
This Super.com deal was found by Cheapflights users on 3/24. 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.
Sun 4/2612:51 pm
DEN
- SEA
Nonstop3h 14m
Frontier
Deal found 3/24![Frontier logo]()
$63
This Super.com deal was found by Cheapflights users on 3/24. 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.
Sun 4/268:24 am
DEN
- PDX
Nonstop2h 56m
Frontier
Deal found 3/24![Frontier logo]()
$63
This Cheapflightsfares deal was found by Cheapflights users on 3/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/177:40 am
DEN
- SEA
Nonstop3h 12m
Frontier
Deal found 3/24![Frontier logo]()
$64
This Booking.com deal was found by Cheapflights users on 3/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/73:00 pm
DEN
- PDX
Nonstop2h 46m
Frontier
Deal found 3/22![Frontier logo]()
$65
This Super.com deal was found by Cheapflights users on 3/25. 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.
Sun 5/243:00 pm
DEN
- PDX
Nonstop2h 46m
Frontier
Deal found 3/25![Frontier logo]()
$68
This Frontier deal was found by Cheapflights users on 3/25. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/233:10 pm
DEN
- PDX
Nonstop2h 47m
Frontier
Deal found 3/25![Frontier logo]()
$69
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 March 26, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $79 (Super.com) |
One-way from | $52 (Kiwi.com) |
Popular in | June |
Cheapest in | January |
Average price | $227 |
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 March 26, 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
DenverPortland
DEN - PDX
DENPDX
Denver Intl
Wed 5/13
6:19 pm-11:44 pm
1 stop6h 25m
Portland
Sat 5/16
3:30 pm-11:52 pm
1 stop7h 22m
$196
DenverPortland
DEN - PDX
DENPDX
Denver Intl
Sat 4/25
1:15 pm-2:55 pm
Nonstop2h 40m
Portland
Tue 4/28
6:30 am-3:05 pm
2 stops7h 35m
$204
Colorado SpringsPortland
COS - PDX
COSPDX
Colorado Springs
Tue 5/5
4:05 pm-10:00 pm
1 stop6h 55m
Portland
Tue 5/12
5:30 am-12:35 pm
1 stop6h 05m
$217
DenverPortland
DEN - PDX
DENPDX
Denver Intl
Sat 5/30
5:10 pm-9:45 pm
1 stop5h 35m
Portland
Sat 6/6
1:10 pm-10:35 pm
2 stops8h 25m
$218
Colorado SpringsSeattle
COS - SEA
COSSEA
Colorado Springs
Tue 5/5
6:50 pm-11:55 pm
1 stop6h 05m
Seattle/Tacoma Intl
Tue 5/12
11:35 am-9:20 pm
2 stops8h 45m
$222
DenverSeattle
DEN - SEA
DENSEA
Denver Intl
Sat 5/2
4:15 pm-6:15 pm
Nonstop3h 00m
Seattle/Tacoma Intl
Mon 5/4
5:30 am-9:05 am
Nonstop2h 35m
$226
DenverSeattle
DEN - SEA
DENSEA
Denver Intl
Sat 4/25
11:40 am-8:35 pm
2 stops9h 55m
Seattle/Tacoma Intl
Tue 4/28
6:50 am-3:05 pm
2 stops7h 15m
$232
DenverSeattle
DEN - SEA
DENSEA
Denver Intl
Fri 4/17
1:20 pm-3:15 pm
Nonstop2h 55m
Seattle/Tacoma Intl
Mon 4/20
8:00 pm-11:50 pm
Nonstop2h 50m
$237
DenverSeattle
DEN - SEA
DENSEA
Denver Intl
Fri 5/8
6:35 pm-8:37 pm
Nonstop3h 02m
Seattle/Tacoma Intl
Sun 5/10
7:50 am-11:49 am
Nonstop2h 59m
$237
DenverPortland
DEN - PDX
DENPDX
Denver Intl
Tue 4/14
12:30 pm-6:08 pm
1 stop6h 38m
Portland
Sat 4/18
3:35 pm-11:50 pm
1 stop7h 15m
$237
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
DEN-GEG
COS-SEA
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
DEN-GEG
What is the cheapest month to book a flight from Colorado to State of Washington?
Currently, September is the cheapest month in which you can book a flight from Colorado to State of Washington (average of $49). Flying from Colorado to State of Washington in July is currently the most expensive (average of $98). 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 March 26, 2026.
It’s optimal to fly from Colorado to State of Washington in the evening. By choosing this option you can save up to 23% on the cost of your flight, compared to a flight in the morning.
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 March 23, 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 March 26, 2026.
The most flights from USCO to USWA are scheduled on a Monday (33 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (14 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 March 26, 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.
Overall
8.0
Comfort
8.0
Entertainment
7.5
Food
7.0
Boarding
8.1
Crew
8.6
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Overall
8.0
Comfort
8.0
Entertainment
7.5
Food
7.0
Boarding
8.1
Crew
8.6
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Overall
8.0
Comfort
8.0
Entertainment
7.5
Food
7.0
Boarding
8.1
Crew
8.6
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Overall
8.0
Comfort
8.0
Entertainment
7.5
Food
7.0
Boarding
8.1
Crew
8.6
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Overall
8.0
Comfort
8.0
Entertainment
7.5
Food
7.0
Boarding
8.1
Crew
8.6
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Overall
8.0
Comfort
8.0
Entertainment
7.5
Food
7.0
Boarding
8.1
Crew
8.6
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 March 26, 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 March 26, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$55 | Average$161 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$88 | Average$327 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$105 | Average$302 | FlexibilityNo cancel fee | On-time85% | |
| Cheapest$116 | Average$388 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$117 | Average$347 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$126 | Average$398 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$186 | Average$427 | FlexibilityNo cancel fee | On-time71% |