$94+ 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 7/8. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — SEA
Jun 25 — Jul 21
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 May 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 May 26, 2026.
This deal was found by Cheapflights users on 5/23. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/107:45 am
DEN
- SEA
Nonstop3h 03m
Frontier
Wed 6/177:41 pm
SEA
- DEN
Nonstop2h 55m
Frontier
Deal found 5/23![Frontier logo]()
$173
This Super.com deal was found by Cheapflights users on 5/25. 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 7/82:55 pm
DEN
- PDX
Nonstop2h 41m
Frontier
Tue 7/145:16 pm
PDX
- DEN
Nonstop2h 43m
Frontier
Deal found 5/25![Frontier logo]()
$186
This Kiwi.com deal was found by Cheapflights users on 5/23. 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 6/172:50 pm
DEN
- PDX
Nonstop2h 45m
Frontier
Fri 6/1912:26 pm
PDX
- DEN
Nonstop2h 42m
Frontier
Deal found 5/23![Frontier logo]()
$187
This Frontier deal was found by Cheapflights users on 5/25. 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.
Thu 9/33:10 pm
DEN
- PDX
Nonstop2h 47m
Frontier
Sun 9/612:26 pm
PDX
- DEN
Nonstop2h 42m
Frontier
Deal found 5/25![Frontier logo]()
$188
This Frontier deal was found by Cheapflights users on 5/25. 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.
Thu 7/93:08 pm
DEN
- PDX
Nonstop2h 43m
Frontier
Thu 7/1612:20 pm
PDX
- DEN
Nonstop2h 43m
Frontier
Deal found 5/25![Frontier logo]()
$189
This Mytrip deal was found by Cheapflights users on 5/26. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/103:08 pm
DEN
- PDX
Nonstop2h 43m
Frontier
Fri 7/1712:20 pm
PDX
- DEN
Nonstop2h 43m
Frontier
Deal found 5/26![Frontier logo]()
$190
This Kiwi.com deal was found by Cheapflights users on 5/24. 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 7/243:08 pm
DEN
- PDX
Nonstop2h 43m
Frontier
Mon 7/2712:20 pm
PDX
- DEN
Nonstop2h 43m
Frontier
Deal found 5/24![Frontier logo]()
$192
This Trip.com deal was found by Cheapflights users on 5/26. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/213:10 pm
DEN
- PDX
Nonstop2h 47m
Frontier
Sun 8/2312:26 pm
PDX
- DEN
Nonstop2h 42m
Frontier
Deal found 5/26![Frontier logo]()
$194
This Kiwi.com deal was found by Cheapflights users on 5/25. 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.
Tue 9/2212:37 pm
DEN
- PDX
Nonstop2h 50m
Frontier
Fri 10/23:22 pm
PDX
- DEN
Nonstop2h 36m
Frontier
Deal found 5/25![Frontier logo]()
$195
This Cheapflightsfares deal was found by Cheapflights users on 5/23. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/223:10 pm
DEN
- PDX
Nonstop2h 47m
Frontier
Fri 6/2612:26 pm
PDX
- DEN
Nonstop2h 42m
Frontier
Deal found 5/23![Frontier logo]()
$196
This Frontier deal was found by Cheapflights users on 5/22. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/152:45 pm
DEN
- PDX
Nonstop2h 50m
Frontier
Sun 10/1812:34 pm
PDX
- DEN
Nonstop2h 32m
Frontier
Deal found 5/22![Frontier logo]()
$197
This Cheapflightsfares deal was found by Cheapflights users on 5/26. 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.
Sun 6/213:10 pm
DEN
- PDX
Nonstop2h 47m
Frontier
Sat 6/2712:26 pm
PDX
- DEN
Nonstop2h 42m
Frontier
Deal found 5/26![Frontier logo]()
$198
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 May 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 May 26, 2026.
This Southwest deal was found by Cheapflights users on 5/22. 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.
Wed 7/157:55 pm
COS
- PDX
1 stop5h 15m
Southwest
Sat 7/185:00 am
PDX
- COS
1 stop5h 20m
Southwest
Deal found 5/22![Southwest logo]()
$217
This Delta deal was found by Cheapflights users on 5/24. 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.
Fri 7/106:16 pm
COS
- PDX
1 stop6h 28m
Delta
Sat 7/189:31 am
PDX
- COS
1 stop7h 04m
Delta
Deal found 5/24![Delta logo]()
$217
This Alaska Airlines deal was found by Cheapflights users on 5/25. 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 10/2411:58 am
DEN
- PSC
1 stop6h 25m
Alaska Airlines
Wed 10/281:55 pm
PSC
- DEN
1 stop7h 26m
Alaska Airlines
Deal found 5/25![Alaska Airlines logo]()
$269
This United Airlines deal was found by Cheapflights users on 5/24. 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 6/177:24 pm
DEN
- PSC
Nonstop2h 28m
United Airlines
Thu 6/255:14 am
PSC
- DEN
Nonstop2h 22m
United Airlines
Deal found 5/24![United Airlines logo]()
$269
This Southwest deal was found by Cheapflights users on 5/25. 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.
Fri 7/177:55 pm
COS
- PDX
1 stop5h 40m
Southwest
Mon 7/206:00 pm
PDX
- COS
1 stop6h 20m
Southwest
Deal found 5/25![Southwest logo]()
$217
This Delta deal was found by Cheapflights users on 5/26. 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.
Sat 9/125:55 pm
COS
- SEA
1 stop5h 21m
Delta
Wed 9/237:15 am
SEA
- COS
2 stops9h 19m
Delta
Deal found 5/26![Delta logo]()
$222
This Southwest deal was found by Cheapflights users on 5/24. 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 7/276:10 am
COS
- PDX
2 stops9h 00m
Southwest
Mon 8/36:00 pm
PDX
- COS
1 stop6h 20m
Southwest
Deal found 5/24![Southwest logo]()
$222
This Delta deal was found by Cheapflights users on 5/22. 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.
Sun 8/306:16 pm
COS
- SEA
1 stop6h 43m
Delta
Wed 9/212:00 pm
SEA
- COS
2 stops9h 29m
Delta
Deal found 5/22![Delta logo]()
$261
This Alaska Airlines deal was found by Cheapflights users on 5/21. 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 8/712:02 pm
DEN
- PDX
Nonstop2h 44m
Alaska Airlines
Fri 8/76:04 pm
PDX
- DEN
Nonstop2h 36m
Alaska Airlines
Deal found 5/21![Alaska Airlines logo]()
$297
This United Airlines deal was found by Cheapflights users on 5/24. 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.
Tue 9/291:15 pm
COS
- SEA
2 stops11h 11m
United Airlines
Wed 9/3012:15 pm
SEA
- COS
2 stops10h 44m
United Airlines
Deal found 5/24![United Airlines logo]()
$307
This Delta deal was found by Cheapflights users on 5/23. 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.
Wed 7/296:56 pm
GJT
- SEA
1 stop6h 03m
Delta
Tue 8/1812:36 pm
SEA
- GJT
2 stops8h 20m
Delta
Deal found 5/23![Delta logo]()
$276
This United Airlines deal was found by Cheapflights users on 5/24. 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.
Sun 10/186:00 am
COS
- PDX
1 stop4h 31m
United Airlines
Tue 10/206:45 pm
PDX
- COS
1 stop4h 14m
United Airlines
Deal found 5/24![United Airlines logo]()
$307
This Alaska Airlines deal was found by Cheapflights users on 5/25. 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.
Tue 10/2012:31 pm
DEN
- GEG
1 stop10h 09m
Alaska Airlines
Wed 10/217:16 am
GEG
- DEN
1 stop9h 46m
Alaska Airlines
Deal found 5/25![Alaska Airlines logo]()
$309
This Southwest deal was found by Cheapflights users on 5/23. 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.
Thu 8/134:20 pm
COS
- PDX
2 stops7h 45m
Southwest
Tue 8/185:50 am
PDX
- COS
1 stop5h 45m
Southwest
Deal found 5/23![Southwest logo]()
$302
This Delta deal was found by Cheapflights users on 5/24. 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.
Fri 6/266:41 pm
DEN
- PDX
1 stop6h 13m
Delta
Mon 6/295:50 pm
PDX
- DEN
1 stop4h 56m
Delta
Deal found 5/24![Delta logo]()
$277
This United Airlines deal was found by Cheapflights users on 5/22. 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 10/285:13 pm
COS
- PDX
1 stop4h 36m
United Airlines
Sat 10/311:39 pm
PDX
- COS
2 stops9h 20m
United Airlines
Deal found 5/22![United Airlines logo]()
$312
This Southwest deal was found by Cheapflights users on 5/26. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/106:10 am
COS
- PDX
2 stops9h 00m
Southwest
Sat 7/185:00 am
PDX
- COS
1 stop5h 20m
Southwest
Deal found 5/26![Southwest logo]()
$302
This Alaska Airlines deal was found by Cheapflights users on 5/23. 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 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 8/1910:49 am
PSC
- DEN
2 stops12h 10m
Alaska Airlines
Deal found 5/23![Alaska Airlines logo]()
$334
This Delta deal was found by Cheapflights users on 5/24. 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.
Fri 8/76:20 am
DEN
- PDX
1 stop6h 20m
Delta
Fri 8/75:54 pm
PDX
- DEN
1 stop5h 04m
Delta
Deal found 5/24![Delta logo]()
$277
This Southwest deal was found by Cheapflights users on 5/21. 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.
Fri 7/247:55 pm
COS
- PDX
1 stop5h 35m
Southwest
Mon 7/274:25 pm
PDX
- COS
2 stops7h 55m
Southwest
Deal found 5/21![Southwest logo]()
$302
This United Airlines deal was found by Cheapflights users on 5/25. 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 6/177:24 pm
DEN
- PSC
Nonstop2h 28m
United Airlines
Mon 6/225:14 am
PSC
- DEN
Nonstop2h 22m
United Airlines
Deal found 5/25![United Airlines logo]()
$337
This Alaska Airlines deal was found by Cheapflights users on 5/21. 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 7/18:00 am
DEN
- PAE
1 stop4h 53m
Alaska Airlines
Tue 7/712:33 pm
PAE
- DEN
1 stop4h 36m
Alaska Airlines
Deal found 5/21![Alaska Airlines logo]()
$345
This Delta deal was found by Cheapflights users on 5/22. 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 6/185:40 am
DEN
- PSC
1 stop4h 26m
Delta
Mon 6/223:25 pm
PSC
- DEN
1 stop7h 21m
Delta
Deal found 5/22![Delta logo]()
$289
This Southwest deal was found by Cheapflights users on 5/22. 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.
Mon 7/209:05 pm
COS
- SEA
1 stop5h 40m
Southwest
Thu 7/235:35 pm
SEA
- COS
1 stop6h 40m
Southwest
Deal found 5/22![Southwest logo]()
$305
This United Airlines deal was found by Cheapflights users on 5/25. 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.
Sat 10/247:10 pm
DEN
- PSC
Nonstop2h 27m
United Airlines
Wed 10/285:25 am
PSC
- DEN
Nonstop2h 25m
United Airlines
Deal found 5/25![United Airlines logo]()
$349
This Delta deal was found by Cheapflights users on 5/24. 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.
Sat 7/41:15 pm
DEN
- PSC
1 stop6h 28m
Delta
Wed 7/81:50 pm
PSC
- DEN
1 stop7h 11m
Delta
Deal found 5/24![Delta logo]()
$289
This Alaska Airlines deal was found by Cheapflights users on 5/23. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/218:08 am
DEN
- PAE
1 stop4h 33m
Alaska Airlines
Sat 8/2912:21 pm
PAE
- DEN
1 stop5h 11m
Alaska Airlines
Deal found 5/23![Alaska Airlines logo]()
$356
This Southwest deal was found by Cheapflights users on 5/22. 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.
Sun 8/307:30 pm
COS
- SEA
1 stop6h 20m
Southwest
Wed 9/211:40 am
SEA
- COS
1 stop7h 15m
Southwest
Deal found 5/22![Southwest logo]()
$305
This Delta deal was found by Cheapflights users on 5/22. 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 8/206:44 pm
DEN
- PSC
1 stop6h 11m
Delta
Mon 8/245:24 pm
PSC
- DEN
1 stop4h 26m
Delta
Deal found 5/22![Delta logo]()
$289
This United Airlines deal was found by Cheapflights users on 5/21. 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.
Fri 6/197:24 pm
DEN
- PSC
Nonstop2h 28m
United Airlines
Sun 6/215:14 am
PSC
- DEN
Nonstop2h 22m
United Airlines
Deal found 5/21![United Airlines logo]()
$351
Last-minute flights from Colorado to WashingtonDiscover last-minute flight deals from Colorado to Washington. Data last updated May 26, 2026 and is based on user searches.
Discover last-minute flight deals from Colorado to Washington. Data last updated May 26, 2026 and is based on user searches.
This deal was found by Cheapflights users on 5/23. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/107:45 am
DEN
- SEA
Nonstop3h 03m
Frontier
Wed 6/177:41 pm
SEA
- DEN
Nonstop2h 55m
Frontier
Deal found 5/23![Frontier logo]()
$173
This Super.com deal was found by Cheapflights users on 5/25. 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.
Mon 6/153:10 pm
DEN
- PDX
Nonstop2h 47m
Frontier
Wed 6/175:20 pm
PDX
- DEN
Nonstop2h 41m
Frontier
Deal found 5/25![Frontier logo]()
$186
This Kiwi.com deal was found by Cheapflights users on 5/23. 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 6/172:50 pm
DEN
- PDX
Nonstop2h 45m
Frontier
Fri 6/1912:26 pm
PDX
- DEN
Nonstop2h 42m
Frontier
Deal found 5/23![Frontier logo]()
$187
This Frontier deal was found by Cheapflights users on 5/24. 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 6/172:50 pm
DEN
- PDX
Nonstop2h 45m
Frontier
Sat 6/2712:26 pm
PDX
- DEN
Nonstop2h 42m
Frontier
Deal found 5/24![Frontier logo]()
$188
This Cheapflightsfares deal was found by Cheapflights users on 5/23. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/203:10 pm
DEN
- PDX
Nonstop2h 47m
Frontier
Sat 6/2712:26 pm
PDX
- DEN
Nonstop2h 42m
Frontier
Deal found 5/23![Frontier logo]()
$195
This Kiwi.com deal was found by Cheapflights users on 5/23. 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.
Sat 6/203:10 pm
DEN
- PDX
Nonstop2h 47m
Frontier
Tue 6/235:20 pm
PDX
- DEN
Nonstop2h 41m
Frontier
Deal found 5/23![Frontier logo]()
$199
This Frontier deal was found by Cheapflights users on 5/24. 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.
Sat 6/203:10 pm
DEN
- PDX
Nonstop2h 47m
Frontier
Wed 7/15:20 pm
PDX
- DEN
Nonstop2h 41m
Frontier
Deal found 5/24![Frontier logo]()
$203
This Cheapflightsfares deal was found by Cheapflights users on 5/26. 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.
Sun 6/213:10 pm
DEN
- PDX
Nonstop2h 47m
Frontier
Sat 6/2712:26 pm
PDX
- DEN
Nonstop2h 42m
Frontier
Deal found 5/26![Frontier logo]()
$198
This Cheapflightsfares deal was found by Cheapflights users on 5/23. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/223:10 pm
DEN
- PDX
Nonstop2h 47m
Frontier
Fri 6/2612:26 pm
PDX
- DEN
Nonstop2h 42m
Frontier
Deal found 5/23![Frontier logo]()
$196
This Frontier deal was found by Cheapflights users on 5/24. 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.
Mon 6/223:10 pm
DEN
- PDX
Nonstop2h 47m
Frontier
Wed 6/245:20 pm
PDX
- DEN
Nonstop2h 41m
Frontier
Deal found 5/24![Frontier logo]()
$197
This Cheapflightsfares deal was found by Cheapflights users on 5/25. 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 6/247:26 pm
DEN
- PDX
1 stop25h 21m
Frontier
Wed 7/15:20 pm
PDX
- DEN
Nonstop2h 41m
Frontier
Deal found 5/25![Frontier logo]()
$207
This Super.com deal was found by Cheapflights users on 5/22. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/273:10 pm
DEN
- PDX
Nonstop2h 47m
Frontier
Sun 7/512:20 pm
PDX
- DEN
Nonstop2h 43m
Frontier
Deal found 5/22![Frontier logo]()
$206
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 May 26, 2026.
Search for one-way flight options from Colorado to Washington. Find affordable one-way fares based on user searches. Data last updated May 26, 2026.
This Cheapflightsfares deal was found by Cheapflights users on 5/25. 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 7/82:55 pm
DEN
- PDX
Nonstop2h 41m
Frontier
Deal found 5/25![Frontier logo]()
$94
This Frontier deal was found by Cheapflights users on 5/23. 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.
Sun 8/93:08 pm
DEN
- PDX
Nonstop2h 43m
Frontier
Deal found 5/23![Frontier logo]()
$95
This Cheapflightsfares deal was found by Cheapflights users on 5/23. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/143:10 pm
DEN
- PDX
Nonstop2h 47m
Frontier
Deal found 5/23![Frontier logo]()
$101
This Kiwi.com deal was found by Cheapflights users on 5/25. 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.
Wed 7/152:55 pm
DEN
- PDX
Nonstop2h 41m
Frontier
Deal found 5/25![Frontier logo]()
$102
This Cheapflightsfares deal was found by Cheapflights users on 5/25. 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.
Sun 6/213:10 pm
DEN
- PDX
Nonstop2h 47m
Frontier
Deal found 5/25![Frontier logo]()
$104
This Frontier deal was found by Cheapflights users on 5/24. 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.
Mon 6/223:10 pm
DEN
- PDX
Nonstop2h 47m
Frontier
Deal found 5/24![Frontier logo]()
$106
This Cheapflightsfares deal was found by Cheapflights users on 5/25. 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 6/273:10 pm
DEN
- PDX
Nonstop2h 47m
Frontier
Deal found 5/25![Frontier logo]()
$107
This Super.com deal was found by Cheapflights users on 5/24. 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.
Sat 6/203:10 pm
DEN
- PDX
Nonstop2h 47m
Frontier
Deal found 5/24![Frontier logo]()
$108
This Delta deal was found by Cheapflights users on 5/22. 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.
Wed 7/86:16 pm
COS
- SEA
1 stop6h 43m
Delta
Deal found 5/22![Delta logo]()
$109
This Delta deal was found by Cheapflights users on 5/26. 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.
Sat 6/206:20 pm
COS
- PDX
1 stop5h 20m
Delta
Deal found 5/26![Delta logo]()
$109
This Delta deal was found by Cheapflights users on 5/24. 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 7/148:10 am
COS
- SEA
2 stops9h 30m
Delta
Deal found 5/24![Delta logo]()
$114
This Cheapflightsfares deal was found by Cheapflights users on 5/25. 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 6/247:45 am
DEN
- SEA
Nonstop3h 03m
Frontier
Deal found 5/25![Frontier logo]()
$116
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 May 26, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $173 |
One-way from | $94 (Cheapflightsfares) |
Popular in | June |
Cheapest in | January |
Average price | $257 |
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 May 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
Colorado SpringsPortland
COS - PDX
COSPDX
Colorado Springs
Wed 7/15
7:55 pm-12:10 am
1 stop5h 15m
Portland
Sat 7/18
5:00 am-11:20 am
1 stop5h 20m
$217
Colorado SpringsPortland
COS - PDX
COSPDX
Colorado Springs
Fri 7/10
6:16 pm-11:44 pm
1 stop6h 28m
Portland
Sat 7/18
9:31 am-5:35 pm
1 stop7h 04m
$217
Colorado SpringsPortland
COS - PDX
COSPDX
Colorado Springs
Fri 7/17
7:55 pm-12:35 am
1 stop5h 40m
Portland
Mon 7/20
6:00 pm-1:20 am
1 stop6h 20m
$217
Colorado SpringsSeattle
COS - SEA
COSSEA
Colorado Springs
Sat 9/12
5:55 pm-10:16 pm
1 stop5h 21m
Seattle/Tacoma Intl
Wed 9/23
7:15 am-5:34 pm
2 stops9h 19m
$222
Colorado SpringsPortland
COS - PDX
COSPDX
Colorado Springs
Mon 7/27
6:10 am-2:10 pm
2 stops9h 00m
Portland
Mon 8/3
6:00 pm-1:20 am
1 stop6h 20m
$222
Colorado SpringsSeattle
COS - SEA
COSSEA
Colorado Springs
Sun 8/30
6:16 pm-11:59 pm
1 stop6h 43m
Seattle/Tacoma Intl
Wed 9/2
12:00 pm-10:29 pm
2 stops9h 29m
$261
DenverPasco
DEN - PSC
DENPSC
Denver Intl
Sat 10/24
11:58 am-5:23 pm
1 stop6h 25m
Pasco Tri Cities
Wed 10/28
1:55 pm-10:21 pm
1 stop7h 26m
$269
Quickest round-trip
DenverPasco
DEN - PSC
DENPSC
Denver Intl
Wed 6/17
7:24 pm-8:52 pm
Nonstop2h 28m
Pasco Tri Cities
Thu 6/25
5:14 am-8:36 am
Nonstop2h 22m
$269
Grand JunctionSeattle
GJT - SEA
GJTSEA
Grand Junction Regnl
Wed 7/29
6:56 pm-11:59 pm
1 stop6h 03m
Seattle/Tacoma Intl
Tue 8/18
12:36 pm-9:56 pm
2 stops8h 20m
$276
DenverPortland
DEN - PDX
DENPDX
Denver Intl
Fri 6/26
6:41 pm-11:54 pm
1 stop6h 13m
Portland
Mon 6/29
5:50 pm-11:46 pm
1 stop4h 56m
$277
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-PDX
COS-SEA
COS-PDX
DEN-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-PDX
COS-SEA
COS-PDX
DEN-SEA
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 $193). Flying from Colorado to State of Washington in January is currently the most expensive (average of $415). 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 May 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 at noon.
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 May 26, 2026.
The most flights from USCO to USWA are scheduled on a Tuesday (41 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (24 on average).
How much does it cost to fly round-trip from Colorado to State of Washington?
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 29 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 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 May 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. Sunday at noon flights should be avoided if possible as fares are typically the most expensive at this time.
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 May 26, 2026.
Peruse reviews from past customers who have flown with Alaska Airlines,Southwest, 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.
Entertainment
7.0
Food
7.1
Crew
8.5
Overall
7.9
Comfort
7.8
Boarding
8.1
Reviews
1 / 20
8.0
ExcellentEugene,Mar 2026
MFR - SEA
Entertainment
7.0
Food
7.1
Crew
8.5
Overall
7.9
Comfort
7.8
Boarding
8.1
Reviews
1 / 20
8.0
ExcellentEugene,Mar 2026
MFR - SEA
Entertainment
7.0
Food
7.1
Crew
8.5
Overall
7.9
Comfort
7.8
Boarding
8.1
Reviews
1 / 20
8.0
ExcellentEugene,Mar 2026
MFR - SEA
Entertainment
7.0
Food
7.1
Crew
8.5
Overall
7.9
Comfort
7.8
Boarding
8.1
Reviews
1 / 20
8.0
ExcellentEugene,Mar 2026
MFR - SEA
Entertainment
7.0
Food
7.1
Crew
8.5
Overall
7.9
Comfort
7.8
Boarding
8.1
Reviews
1 / 20
8.0
ExcellentEugene,Mar 2026
MFR - SEA
Entertainment
7.0
Food
7.1
Crew
8.5
Overall
7.9
Comfort
7.8
Boarding
8.1
Reviews
1 / 20
8.0
ExcellentEugene,Mar 2026
MFR - SEA
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 May 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 May 26, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$55 | Average$168 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$85 | Average$314 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$89 | Average$321 | FlexibilityNo cancel fee | On-time85% | |
| Cheapest$117 | Average$397 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$117 | Average$353 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$127 | Average$410 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$200 | Average$429 | FlexibilityNo cancel fee | On-time71% |