$92+ Cheap flights from Washington to Colorado
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 7/13. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — DEN
Jun 25 — Jul 21
Round-trip
1 adult, Economy
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Cheapest flights from Washington to ColoradoExplore the most affordable flight options available from Washington to Colorado. Find the lowest fares from popular airlines and budget airlines, with prices last updated on May 26, 2026.
Explore the most affordable flight options available from Washington to Colorado. Find the lowest fares from popular airlines and budget airlines, with prices last updated on May 26, 2026.
This Cheapflightsfares 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/197:41 pm
SEA
- DEN
Nonstop2h 55m
Frontier
Mon 8/317:45 am
DEN
- SEA
Nonstop3h 03m
Frontier
Deal found 5/21![Frontier logo]()
$164
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/243:22 pm
PDX
- DEN
Nonstop2h 36m
Frontier
Tue 9/2912:37 pm
DEN
- PDX
Nonstop2h 50m
Frontier
Deal found 5/21![Frontier logo]()
$181
This Cheapflightsfares deal was found by Cheapflights users on 5/20. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/187:41 pm
SEA
- DEN
Nonstop2h 53m
Frontier
Mon 9/2110:29 pm
DEN
- SEA
Nonstop2h 58m
Frontier
Deal found 5/20![Frontier logo]()
$185
This Cheapflightsfares deal was found by Cheapflights users on 5/20. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/17:41 pm
SEA
- DEN
Nonstop2h 55m
Frontier
Tue 7/710:00 am
DEN
- SEA
1 stop25h 39m
Frontier
Deal found 5/20![Frontier logo]()
$186
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.
Thu 7/912:20 pm
PDX
- DEN
Nonstop2h 43m
Frontier
Mon 7/133:08 pm
DEN
- PDX
Nonstop2h 43m
Frontier
Deal found 5/25![Frontier logo]()
$186
This Cheapflightsfares 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/27:41 pm
SEA
- DEN
Nonstop2h 55m
Frontier
Wed 9/2310:29 pm
DEN
- SEA
Nonstop2h 58m
Frontier
Deal found 5/21![Frontier logo]()
$187
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 8/125:21 pm
PDX
- DEN
Nonstop2h 43m
Frontier
Fri 8/213:10 pm
DEN
- PDX
Nonstop2h 47m
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.
Fri 9/113:22 pm
PDX
- DEN
Nonstop2h 36m
Frontier
Thu 9/172:45 pm
DEN
- PDX
Nonstop2h 50m
Frontier
Deal found 5/25![Frontier logo]()
$188
This Cheapflightsfares 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/17:41 pm
SEA
- DEN
Nonstop2h 55m
Frontier
Wed 7/89:13 am
DEN
- SEA
Nonstop3h 07m
Frontier
Deal found 5/21![Frontier logo]()
$189
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.
Fri 6/1212:26 pm
PDX
- DEN
Nonstop2h 42m
Frontier
Mon 6/153:10 pm
DEN
- PDX
Nonstop2h 47m
Frontier
Deal found 5/22![Frontier logo]()
$189
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 8/265:42 pm
PDX
- DEN
Nonstop2h 41m
Frontier
Fri 8/283:10 pm
DEN
- PDX
Nonstop2h 47m
Frontier
Deal found 5/23![Frontier logo]()
$190
This Cheapflightsfares 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/223:22 pm
PDX
- DEN
Nonstop2h 36m
Frontier
Sun 9/278:30 am
DEN
- PDX
1 stop13h 09m
Frontier
Deal found 5/21![Frontier logo]()
$192
Best flights from Washington to ColoradoDiscover carefully curated flight deals from Washington to Colorado that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated May 26, 2026.
Discover carefully curated flight deals from Washington to Colorado that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated May 26, 2026.
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 7/206:00 pm
PDX
- COS
1 stop6h 20m
Southwest
Sat 7/257:55 pm
COS
- PDX
1 stop5h 00m
Southwest
Deal found 5/24![Southwest logo]()
$217
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/189:30 am
SEA
- COS
1 stop7h 05m
Delta
Tue 7/218:10 am
COS
- SEA
1 stop7h 28m
Delta
Deal found 5/21![Delta logo]()
$217
This Alaska 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/287:20 am
PDX
- DEN
Nonstop2h 43m
Alaska Airlines
Fri 7/317:05 pm
DEN
- PDX
Nonstop2h 45m
Alaska Airlines
Deal found 5/22![Alaska Airlines logo]()
$257
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.
Wed 7/86:50 pm
PDX
- DEN
Nonstop2h 38m
United Airlines
Tue 7/141:27 pm
DEN
- PDX
Nonstop2h 46m
United Airlines
Deal found 5/21![United Airlines logo]()
$257
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.
Fri 7/245:00 pm
PDX
- COS
1 stop7h 25m
Southwest
Mon 7/276:10 am
COS
- PDX
2 stops9h 00m
Southwest
Deal found 5/23![Southwest logo]()
$222
This American 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/511:24 pm
SEA
- DRO
1 stop9h 30m
American Airlines
Mon 6/85:06 pm
DRO
- SEA
1 stop8h 53m
American Airlines
Deal found 5/23![American Airlines logo]()
$473
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.
Thu 8/205:08 pm
PDX
- COS
1 stop4h 20m
Delta
Sun 8/236:16 pm
COS
- PDX
1 stop6h 23m
Delta
Deal found 5/23![Delta logo]()
$247
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 8/126:04 pm
PSC
- DEN
1 stop4h 55m
Alaska Airlines
Tue 8/188:00 am
DEN
- PSC
1 stop8h 22m
Alaska Airlines
Deal found 5/21![Alaska Airlines logo]()
$269
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 8/3011:59 pm
SEA
- COS
1 stop9h 03m
Delta
Wed 9/25:55 pm
COS
- SEA
1 stop7h 06m
Delta
Deal found 5/22![Delta logo]()
$256
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 7/75:14 am
PSC
- DEN
Nonstop2h 22m
United Airlines
Sat 7/117:24 pm
DEN
- PSC
Nonstop2h 28m
United Airlines
Deal found 5/24![United Airlines logo]()
$292
This Southwest deal was found by Cheapflights users on 5/20. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/95:50 am
PDX
- DEN
Nonstop2h 25m
Southwest
Mon 7/137:00 pm
DEN
- PDX
1 stop6h 30m
Southwest
Deal found 5/20![Southwest logo]()
$267
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/187:15 am
SEA
- COS
2 stops9h 20m
Delta
Mon 7/206:16 pm
COS
- SEA
1 stop4h 44m
Delta
Deal found 5/21![Delta logo]()
$261
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.
Thu 8/612:40 pm
PDX
- DEN
1 stop5h 05m
Southwest
Sat 8/84:10 pm
DEN
- PDX
1 stop5h 55m
Southwest
Deal found 5/22![Southwest logo]()
$277
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.
Sat 9/264:07 pm
PDX
- COS
1 stop4h 56m
United Airlines
Tue 9/296:31 pm
COS
- PDX
1 stop5h 21m
United Airlines
Deal found 5/24![United Airlines logo]()
$307
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/1512:36 pm
SEA
- COS
2 stops9h 18m
Delta
Fri 9/186:14 pm
COS
- SEA
1 stop4h 51m
Delta
Deal found 5/25![Delta logo]()
$261
This Alaska 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/1211:26 am
SEA
- DEN
1 stop6h 52m
Alaska Airlines
Sat 8/291:43 pm
DEN
- SEA
1 stop7h 09m
Alaska Airlines
Deal found 5/22![Alaska Airlines logo]()
$325
This Southwest deal was found by Cheapflights users on 5/20. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/57:50 am
PDX
- DEN
2 stops8h 20m
Southwest
Thu 8/139:05 am
DEN
- PDX
1 stop7h 35m
Southwest
Deal found 5/20![Southwest logo]()
$292
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.
Tue 8/1110:33 am
PSC
- DEN
2 stops12h 26m
Alaska Airlines
Tue 8/188:00 am
DEN
- PSC
1 stop8h 22m
Alaska Airlines
Deal found 5/21![Alaska Airlines logo]()
$334
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/115:54 pm
PDX
- DEN
1 stop5h 04m
Delta
Mon 8/175:18 am
DEN
- PDX
1 stop4h 19m
Delta
Deal found 5/21![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.
Sat 6/135:14 am
PSC
- DEN
Nonstop2h 22m
United Airlines
Fri 6/197:24 pm
DEN
- PSC
Nonstop2h 28m
United Airlines
Deal found 5/22![United Airlines logo]()
$336
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.
Thu 9/39:10 am
SEA
- COS
1 stop6h 20m
Southwest
Thu 9/174:20 pm
COS
- SEA
1 stop7h 35m
Southwest
Deal found 5/24![Southwest logo]()
$295
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.
Thu 7/95:14 pm
PDX
- DEN
1 stop4h 26m
Delta
Mon 7/205:40 am
DEN
- PDX
1 stop3h 57m
Delta
Deal found 5/24![Delta logo]()
$277
This Alaska 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/1512:33 pm
PAE
- DEN
1 stop4h 36m
Alaska Airlines
Wed 7/227:05 pm
DEN
- PAE
1 stop17h 48m
Alaska Airlines
Deal found 5/24![Alaska Airlines logo]()
$345
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 6/103:40 pm
SEA
- GJT
1 stop5h 31m
United Airlines
Wed 6/176:09 pm
GJT
- SEA
1 stop6h 01m
United Airlines
Deal found 5/25![United Airlines logo]()
$351
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 8/66:15 am
SEA
- COS
1 stop7h 00m
Southwest
Fri 8/72:15 pm
COS
- SEA
1 stop6h 20m
Southwest
Deal found 5/23![Southwest logo]()
$295
This Delta deal was found by Cheapflights users on 5/20. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/195:50 pm
PDX
- DEN
1 stop4h 56m
Delta
Tue 6/235:40 am
DEN
- PDX
1 stop3h 59m
Delta
Deal found 5/20![Delta logo]()
$277
This Alaska 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/1912:21 pm
PAE
- DEN
1 stop5h 11m
Alaska Airlines
Mon 9/218:06 pm
DEN
- PAE
1 stop27h 23m
Alaska Airlines
Deal found 5/24![Alaska Airlines logo]()
$354
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.
Tue 8/114:00 pm
PDX
- COS
1 stop4h 45m
Southwest
Tue 8/187:20 am
COS
- PDX
2 stops7h 45m
Southwest
Deal found 5/22![Southwest logo]()
$302
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/119:31 am
PDX
- DEN
1 stop4h 22m
Delta
Wed 7/156:39 pm
DEN
- PDX
1 stop6h 15m
Delta
Deal found 5/25![Delta logo]()
$277
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.
Thu 6/45:07 am
SEA
- MTJ
1 stop6h 37m
United Airlines
Tue 6/97:25 am
MTJ
- SEA
2 stops12h 53m
United Airlines
Deal found 5/21![United Airlines logo]()
$370
Last-minute flights from Washington to ColoradoDiscover last-minute flight deals from Washington to Colorado. Data last updated May 26, 2026 and is based on user searches.
Discover last-minute flight deals from Washington to Colorado. Data last updated May 26, 2026 and is based on user searches.
This Super.com 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/1112:26 pm
PDX
- DEN
Nonstop2h 42m
Frontier
Sun 6/143:10 pm
DEN
- PDX
Nonstop2h 47m
Frontier
Deal found 5/21![Frontier logo]()
$195
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.
Fri 6/1212:26 pm
PDX
- DEN
Nonstop2h 42m
Frontier
Mon 6/153:10 pm
DEN
- PDX
Nonstop2h 47m
Frontier
Deal found 5/22![Frontier logo]()
$189
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 6/1312:26 pm
PDX
- DEN
Nonstop2h 42m
Frontier
Sun 6/143:10 pm
DEN
- PDX
Nonstop2h 47m
Frontier
Deal found 5/24![Frontier logo]()
$186
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.
Sat 6/1312:26 pm
PDX
- DEN
Nonstop2h 42m
Frontier
Wed 6/172:50 pm
DEN
- PDX
Nonstop2h 45m
Frontier
Deal found 5/23![Frontier logo]()
$188
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.
Sat 6/1312:26 pm
PDX
- DEN
Nonstop2h 42m
Frontier
Sat 6/203:10 pm
DEN
- PDX
Nonstop2h 47m
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.
Wed 6/175:20 pm
PDX
- DEN
Nonstop2h 41m
Frontier
Sun 6/213:10 pm
DEN
- PDX
Nonstop2h 47m
Frontier
Deal found 5/26![Frontier logo]()
$198
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 6/175:20 pm
PDX
- DEN
Nonstop2h 41m
Frontier
Mon 6/293:10 pm
DEN
- PDX
Nonstop2h 47m
Frontier
Deal found 5/25![Frontier logo]()
$199
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 6/175:20 pm
PDX
- DEN
Nonstop2h 41m
Frontier
Sat 6/203:10 pm
DEN
- PDX
Nonstop2h 47m
Frontier
Deal found 5/25![Frontier logo]()
$201
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 6/175:20 pm
PDX
- DEN
Nonstop2h 41m
Frontier
Sat 6/273:10 pm
DEN
- PDX
Nonstop2h 47m
Frontier
Deal found 5/25![Frontier logo]()
$205
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 6/175:20 pm
PDX
- DEN
Nonstop2h 41m
Frontier
Wed 6/1710:39 pm
DEN
- PDX
1 stop14h 02m
Frontier
Deal found 5/25![Frontier logo]()
$207
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.
Thu 6/1812:26 pm
PDX
- DEN
Nonstop2h 42m
Frontier
Mon 6/223:10 pm
DEN
- PDX
Nonstop2h 47m
Frontier
Deal found 5/23![Frontier logo]()
$196
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 6/235:20 pm
PDX
- DEN
Nonstop2h 41m
Frontier
Fri 6/263:10 pm
DEN
- PDX
Nonstop2h 47m
Frontier
Deal found 5/25![Frontier logo]()
$190
One-way flights from Washington to ColoradoSearch for one-way flight options from Washington to Colorado. Find affordable one-way fares based on user searches. Data last updated May 26, 2026.
Search for one-way flight options from Washington to Colorado. Find affordable one-way fares based on user searches. Data last updated May 26, 2026.
This Kiwi.com deal was found by Cheapflights users on 5/20. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/137:06 pm
SEA
- DEN
Nonstop2h 52m
Frontier
Deal found 5/20![Frontier logo]()
$92
This Super.com deal was found by Cheapflights users on 5/20. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/177:41 pm
SEA
- DEN
Nonstop2h 55m
Frontier
Deal found 5/20![Frontier logo]()
$93
This Cheapflightsfares deal was found by Cheapflights users on 5/20. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/287:41 pm
SEA
- DEN
Nonstop2h 55m
Frontier
Deal found 5/20![Frontier logo]()
$94
This Kiwi.com deal was found by Cheapflights users on 5/20. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/117:41 pm
SEA
- DEN
Nonstop2h 53m
Frontier
Deal found 5/20![Frontier logo]()
$96
This Kiwi.com deal was found by Cheapflights users on 5/20. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/37:41 pm
SEA
- DEN
Nonstop2h 55m
Frontier
Deal found 5/20![Frontier logo]()
$102
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.
Fri 8/2112:26 pm
PDX
- DEN
Nonstop2h 42m
Frontier
Deal found 5/25![Frontier logo]()
$102
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.
Tue 6/235:20 pm
PDX
- DEN
Nonstop2h 41m
Frontier
Deal found 5/24![Frontier logo]()
$105
This Kiwi.com deal was found by Cheapflights users on 5/20. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/217:00 am
SEA
- DEN
Nonstop2h 51m
Frontier
Deal found 5/20![Frontier logo]()
$107
This Kiwi.com deal was found by Cheapflights users on 5/20. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/137:00 am
SEA
- DEN
Nonstop2h 51m
Frontier
Deal found 5/20![Frontier logo]()
$108
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 6/235:24 pm
PDX
- COS
1 stop4h 18m
Delta
Deal found 5/24![Delta logo]()
$109
This Southwest deal was found by Cheapflights users on 5/20. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/35:20 pm
SEA
- COS
1 stop7h 00m
Southwest
Deal found 5/20![Southwest logo]()
$109
This Kiwi.com deal was found by Cheapflights users on 5/20. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/197:00 pm
SEA
- DEN
1 stop7h 52m
Frontier
Deal found 5/20![Frontier logo]()
$110
Find flight deals from Washington to Colorado
Keep the following information in mind while searching for Washington to Colorado flight deals. Data was last updated May 26, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $164 (Cheapflightsfares) |
One-way from | $92 (Kiwi.com) |
Popular in | June |
Cheapest in | January |
Average price | $267 |
Good round-trip deal | $264 or less |
Good one-way deal | $146 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from Washington to Colorado that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated May 26, 2026.
Use the filters below to find and compare flights from Washington to Colorado that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
PortlandColorado Springs
PDX - COS
PDXCOS
Portland
Mon 7/20
6:00 pm-1:20 am
1 stop6h 20m
Colorado Springs
Sat 7/25
7:55 pm-11:55 pm
1 stop5h 00m
$217
SeattleColorado Springs
SEA - COS
SEACOS
Seattle/Tacoma Intl
Sat 7/18
9:30 am-5:35 pm
1 stop7h 05m
Colorado Springs
Tue 7/21
8:10 am-2:38 pm
1 stop7h 28m
$217
PortlandColorado Springs
PDX - COS
PDXCOS
Portland
Fri 7/24
5:00 pm-1:25 am
1 stop7h 25m
Colorado Springs
Mon 7/27
6:10 am-2:10 pm
2 stops9h 00m
$222
PortlandColorado Springs
PDX - COS
PDXCOS
Portland
Thu 8/20
5:08 pm-10:28 pm
1 stop4h 20m
Colorado Springs
Sun 8/23
6:16 pm-11:39 pm
1 stop6h 23m
$247
SeattleColorado Springs
SEA - COS
SEACOS
Seattle/Tacoma Intl
Sun 8/30
11:59 pm-10:02 am
1 stop9h 03m
Colorado Springs
Wed 9/2
5:55 pm-12:01 am
1 stop7h 06m
$256
PortlandDenver
PDX - DEN
PDXDEN
Portland
Tue 7/28
7:20 am-11:03 am
Nonstop2h 43m
Denver Intl
Fri 7/31
7:05 pm-8:50 pm
Nonstop2h 45m
$257
PortlandDenver
PDX - DEN
PDXDEN
Portland
Wed 7/8
6:50 pm-10:28 pm
Nonstop2h 38m
Denver Intl
Tue 7/14
1:27 pm-3:13 pm
Nonstop2h 46m
$257
SeattleColorado Springs
SEA - COS
SEACOS
Seattle/Tacoma Intl
Sat 7/18
7:15 am-5:35 pm
2 stops9h 20m
Colorado Springs
Mon 7/20
6:16 pm-10:00 pm
1 stop4h 44m
$261
SeattleColorado Springs
SEA - COS
SEACOS
Seattle/Tacoma Intl
Tue 9/15
12:36 pm-10:54 pm
2 stops9h 18m
Colorado Springs
Fri 9/18
6:14 pm-10:05 pm
1 stop4h 51m
$261
PortlandDenver
PDX - DEN
PDXDEN
Portland
Thu 7/9
5:50 am-9:15 am
Nonstop2h 25m
Denver Intl
Mon 7/13
7:00 pm-12:30 am
1 stop6h 30m
$267
Showing 1-10 of 60 resultsSorted by cheapest first
Best time to book a flight from Washington to Colorado
Have a flexible travel schedule? Discover the best time to fly to Colorado from Washington with our price prediction graph.
PDX-COS
SEA-COS
PDX-DEN
SEA-DRO
PSC-DEN
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from Washington to Colorado
USWA-USCO
PDX-COS
SEA-COS
PDX-DEN
SEA-DRO
What is the cheapest month to book a flight from State of Washington to Colorado?
Currently, September is the cheapest month in which you can book a flight from State of Washington to Colorado (average of $215). Flying from State of Washington to Colorado in March is currently the most expensive (average of $316). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
What is the cheapest time of day to fly from WA to CO?
Find hourly flight availability from Washington to Colorado. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated May 26, 2026.
When flying from State of Washington to Colorado, the time of day you fly usually plays a role in the price. Save by searching for a flight in the evening, which can drop the price by up to 20% versus a flight in the morning.
Weekly flight availability from State of Washington to Colorado
Explore weekly flight availability from Washington to Colorado. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated May 26, 2026.
The most flights from USWA to USCO are scheduled on a Monday (40 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (23 on average).
How much does it cost to fly round-trip from State of Washington to Colorado?
How far ahead should I book a flight from State of Washington to Colorado?
The best time to book flights from State of Washington to Colorado is 70 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 State of Washington to Colorado?
Use this chart to determine the cheapest time to fly round-trip from Washington to Colorado. Price data was last updated on May 23, 2026.
Travelers seeking maximum savings on their State of Washington to Colorado flight should consider departing on Friday at noon when fares are most often at their lowest. Tuesday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.
Reviews of airlines servicing Colorado
Get insights into the airlines that provide service to Colorado. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Colorado. Reviews last updated May 26, 2026.
Read through reviews of airlines operating flights from Washington to Colorado, such as Alaska Airlines,Southwest, andDelta. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Comfort
7.8
Food
7.1
Boarding
8.1
Overall
7.9
Crew
8.5
Entertainment
7.0
Reviews
1 / 20
4.0
OkayAnonymous,Dec 2025
SEA - MSY
Comfort
7.8
Food
7.1
Boarding
8.1
Overall
7.9
Crew
8.5
Entertainment
7.0
Reviews
1 / 20
4.0
OkayAnonymous,Dec 2025
SEA - MSY
Comfort
7.8
Food
7.1
Boarding
8.1
Overall
7.9
Crew
8.5
Entertainment
7.0
Reviews
1 / 20
4.0
OkayAnonymous,Dec 2025
SEA - MSY
Comfort
7.8
Food
7.1
Boarding
8.1
Overall
7.9
Crew
8.5
Entertainment
7.0
Reviews
1 / 20
4.0
OkayAnonymous,Dec 2025
SEA - MSY
Comfort
7.8
Food
7.1
Boarding
8.1
Overall
7.9
Crew
8.5
Entertainment
7.0
Reviews
1 / 20
4.0
OkayAnonymous,Dec 2025
SEA - MSY
Comfort
7.8
Food
7.1
Boarding
8.1
Overall
7.9
Crew
8.5
Entertainment
7.0
Reviews
1 / 20
4.0
OkayAnonymous,Dec 2025
SEA - MSY
Related info for your journey
Find useful and relevant information for your journey from Washington to Colorado. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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Alternative routes for Washington to Colorado
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to Colorado by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Washington to Colorado by cabin class
Find flights from Washington to Colorado, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Washington and Colorado flights
Browse other Washington and Colorado flight options. Last updated on May 26, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Find a return flight route from Colorado
Find the right flight back to Washington after your stay in Colorado
Washington to Colorado flights
Consider these flights traveling from Washington to Colorado.
Top 8 airlines flying from Washington to Colorado
Discover the top 8 airlines that operate flights from Washington to Colorado. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated May 26, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$56 | Average$160 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$69 | Average$326 | FlexibilityNo cancel fee | On-time85% | |
| Cheapest$91 | Average$288 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$108 | Average$361 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$117 | Average$363 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$130 | Average$409 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$200 | Average$328 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$216 | Average$428 | FlexibilityNo cancel fee | On-time71% |