$87+ 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 9/13. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — DEN
Aug 11 — Aug 181
Round-trip
1 adult, Economy
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Find cheap flights from Washington to Colorado with Cheapflights
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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 July 12, 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 July 12, 2026.
This Southwest deal was found by Cheapflights users on 7/8. Clicking the “Pick Dates” 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 8/136:15 am
SEA
- COS
1 stop7h 00m
Southwest
Mon 8/172:15 pm
COS
- SEA
1 stop6h 20m
Southwest
Deal found 7/8![Southwest logo]()
$173
This Delta deal was found by Cheapflights users on 7/10. Clicking the “Pick Dates” 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 8/1212:36 pm
SEA
- COS
2 stops8h 52m
Delta
Thu 8/206:16 pm
COS
- SEA
1 stop6h 43m
Delta
Deal found 7/10![Delta logo]()
$178
This Southwest deal was found by Cheapflights users on 7/9. Clicking the “Pick Dates” 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 8/266:25 am
SEA
- COS
2 stops8h 15m
Southwest
Mon 8/316:30 am
COS
- SEA
2 stops7h 20m
Southwest
Deal found 7/9![Southwest logo]()
$183
This Southwest deal was found by Cheapflights users on 7/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/59:20 am
SEA
- DEN
2 stops9h 15m
Southwest
Mon 9/76:20 am
DEN
- SEA
1 stop8h 05m
Southwest
Deal found 7/9![Southwest logo]()
$195
This Frontier deal was found by Cheapflights users on 7/11. Clicking the “Pick Dates” 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 10/97:00 pm
SEA
- DEN
1 stop7h 52m
Frontier
Sat 10/107:45 am
DEN
- SEA
Nonstop3h 06m
Frontier
Deal found 7/11![Frontier logo]()
$196
This Kiwi.com deal was found by Cheapflights users on 7/10. Clicking the “Pick Dates” 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 10/1411:06 am
SEA
- DEN
2 stops11h 01m
Frontier
Tue 10/207:45 am
DEN
- SEA
Nonstop3h 06m
Frontier
Deal found 7/10![Frontier logo]()
$197
This Kiwi.com deal was found by Cheapflights users on 7/11. Clicking the “Pick Dates” 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 8/2212:20 pm
PDX
- DEN
Nonstop2h 43m
Frontier
Mon 8/246:45 am
DEN
- PDX
2 stops11h 36m
Frontier
Deal found 7/11![Frontier logo]()
$197
This Frontier deal was found by Cheapflights users on 7/9. Clicking the “Pick Dates” 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 8/27:06 pm
SEA
- DEN
Nonstop2h 52m
Frontier
Sat 8/87:00 am
DEN
- SEA
Nonstop3h 04m
Frontier
Deal found 7/9![Frontier logo]()
$198
This Southwest deal was found by Cheapflights users on 7/9. Clicking the “Pick Dates” 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 8/267:50 am
PDX
- DEN
2 stops6h 55m
Southwest
Wed 9/98:40 pm
DEN
- PDX
Nonstop2h 35m
Southwest
Deal found 7/9![Southwest logo]()
$198
This Southwest deal was found by Cheapflights users on 7/10. Clicking the “Pick Dates” 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 8/711:50 am
SEA
- DEN
1 stop5h 55m
Southwest
Tue 8/112:40 pm
DEN
- SEA
2 stops7h 35m
Southwest
Deal found 7/10![Southwest logo]()
$199
This Southwest deal was found by Cheapflights users on 7/9. Clicking the “Pick Dates” 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 8/135:15 pm
PDX
- DEN
1 stop4h 50m
Southwest
Mon 8/175:55 pm
DEN
- PDX
1 stop6h 10m
Southwest
Deal found 7/9![Southwest logo]()
$199
This Delta deal was found by Cheapflights users on 7/9. Clicking the “Pick Dates” 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 9/1912:36 pm
SEA
- COS
2 stops8h 48m
Delta
Fri 9/256:14 pm
COS
- SEA
1 stop4h 51m
Delta
Deal found 7/9![Delta logo]()
$199
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 July 12, 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 July 12, 2026.
This Southwest deal was found by Cheapflights users on 7/11. Clicking the “Pick Dates” 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 9/236:25 am
SEA
- COS
2 stops8h 15m
Southwest
Wed 9/304:15 pm
COS
- SEA
1 stop7h 50m
Southwest
Deal found 7/11![Southwest logo]()
$178
This Delta deal was found by Cheapflights users on 7/9. Clicking the “Pick Dates” 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 8/119:45 am
PDX
- DEN
1 stop4h 17m
Delta
Mon 8/176:28 pm
DEN
- PDX
1 stop6h 11m
Delta
Deal found 7/9![Delta logo]()
$203
This Alaska Airlines deal was found by Cheapflights users on 7/9. Clicking the “Pick Dates” 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 11/115:49 pm
PDX
- DEN
Nonstop2h 39m
Alaska Airlines
Sun 11/157:50 am
DEN
- PDX
Nonstop3h 00m
Alaska Airlines
Deal found 7/9![Alaska Airlines logo]()
$235
This United Airlines deal was found by Cheapflights users on 7/10. Clicking the “Pick Dates” 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 10/273:02 pm
SEA
- COS
1 stop6h 00m
United Airlines
Sat 10/315:30 am
COS
- SEA
1 stop5h 16m
United Airlines
Deal found 7/10![United Airlines logo]()
$297
This Southwest deal was found by Cheapflights users on 7/10. Clicking the “Pick Dates” 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 8/136:15 am
SEA
- COS
1 stop7h 00m
Southwest
Mon 8/172:15 pm
COS
- SEA
2 stops9h 40m
Southwest
Deal found 7/10![Southwest logo]()
$178
This Southwest deal was found by Cheapflights users on 7/10. Clicking the “Pick Dates” 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 8/266:25 am
SEA
- COS
2 stops8h 15m
Southwest
Mon 8/316:30 am
COS
- SEA
2 stops7h 20m
Southwest
Deal found 7/10![Southwest logo]()
$183
This Delta deal was found by Cheapflights users on 7/8. Clicking the “Pick Dates” 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 8/259:29 am
PDX
- DEN
1 stop7h 19m
Delta
Thu 8/271:21 pm
DEN
- PDX
1 stop7h 23m
Delta
Deal found 7/8![Delta logo]()
$203
This Delta deal was found by Cheapflights users on 7/8. Clicking the “Pick Dates” 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 9/105:50 pm
PDX
- DEN
1 stop4h 57m
Delta
Tue 9/155:30 am
DEN
- PDX
1 stop4h 11m
Delta
Deal found 7/8![Delta logo]()
$203
This Southwest deal was found by Cheapflights users on 7/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/247:35 pm
PDX
- DEN
Nonstop2h 30m
Southwest
Mon 8/314:10 pm
DEN
- PDX
2 stops7h 00m
Southwest
Deal found 7/10![Southwest logo]()
$198
This Alaska Airlines deal was found by Cheapflights users on 7/8. Clicking the “Pick Dates” 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 7/8![Alaska Airlines logo]()
$249
This Southwest deal was found by Cheapflights users on 7/7. Clicking the “Pick Dates” 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 8/2712:40 pm
PDX
- DEN
2 stops6h 25m
Southwest
Tue 9/11:25 pm
DEN
- PDX
Nonstop2h 35m
Southwest
Deal found 7/7![Southwest logo]()
$200
This Delta deal was found by Cheapflights users on 7/8. Clicking the “Pick Dates” 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 9/199:46 am
PDX
- COS
1 stop6h 48m
Delta
Thu 9/248:16 am
COS
- PDX
1 stop4h 59m
Delta
Deal found 7/8![Delta logo]()
$229
This Alaska Airlines deal was found by Cheapflights users on 7/11. Clicking the “Pick Dates” 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 8/252:18 pm
SEA
- DEN
1 stop5h 55m
Alaska Airlines
Wed 8/261:43 pm
DEN
- SEA
1 stop7h 09m
Alaska Airlines
Deal found 7/11![Alaska Airlines logo]()
$257
This Southwest deal was found by Cheapflights users on 7/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/245:45 am
PDX
- DEN
1 stop5h 25m
Southwest
Wed 8/264:00 pm
DEN
- PDX
1 stop4h 50m
Southwest
Deal found 7/8![Southwest logo]()
$200
This United Airlines deal was found by Cheapflights users on 7/7. Clicking the “Pick Dates” 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 9/3012:16 pm
SEA
- COS
2 stops10h 43m
United Airlines
Sat 10/35:07 pm
COS
- SEA
1 stop5h 08m
United Airlines
Deal found 7/7![United Airlines logo]()
$302
This Delta deal was found by Cheapflights users on 7/8. Clicking the “Pick Dates” 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 8/285:08 pm
PDX
- COS
1 stop4h 20m
Delta
Tue 9/16:16 pm
COS
- PDX
1 stop5h 22m
Delta
Deal found 7/8![Delta logo]()
$229
This Alaska Airlines deal was found by Cheapflights users on 7/8. Clicking the “Pick Dates” 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 9/2212:21 pm
PAE
- DEN
1 stop5h 11m
Alaska Airlines
Tue 9/298:08 am
DEN
- PAE
1 stop4h 33m
Alaska Airlines
Deal found 7/8![Alaska Airlines logo]()
$257
This Delta deal was found by Cheapflights users on 7/9. Clicking the “Pick Dates” 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 9/255:10 pm
PDX
- DEN
1 stop4h 30m
Delta
Mon 9/286:00 am
DEN
- PDX
1 stop5h 40m
Delta
Deal found 7/9![Delta logo]()
$229
This Southwest deal was found by Cheapflights users on 7/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/1911:20 am
PDX
- DEN
1 stop5h 10m
Southwest
Thu 9/244:10 pm
DEN
- PDX
2 stops7h 00m
Southwest
Deal found 7/8![Southwest logo]()
$210
This United Airlines deal was found by Cheapflights users on 7/10. Clicking the “Pick Dates” 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 9/162:34 pm
SEA
- DRO
1 stop5h 20m
United Airlines
Tue 9/227:00 am
DRO
- SEA
2 stops9h 39m
United Airlines
Deal found 7/10![United Airlines logo]()
$334
This Alaska Airlines deal was found by Cheapflights users on 7/11. Clicking the “Pick Dates” 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 11/1212:54 pm
PAE
- DEN
1 stop7h 34m
Alaska Airlines
Wed 11/187:50 am
DEN
- PAE
1 stop4h 37m
Alaska Airlines
Deal found 7/11![Alaska Airlines logo]()
$277
This Southwest deal was found by Cheapflights users on 7/9. Clicking the “Pick Dates” 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 9/86:25 am
SEA
- COS
1 stop5h 10m
Southwest
Thu 9/102:15 pm
COS
- SEA
1 stop6h 20m
Southwest
Deal found 7/9![Southwest logo]()
$215
This United Airlines deal was found by Cheapflights users on 7/7. Clicking the “Pick Dates” 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 10/712:16 pm
SEA
- DRO
2 stops8h 59m
United Airlines
Wed 10/146:00 pm
DRO
- SEA
1 stop5h 59m
United Airlines
Deal found 7/7![United Airlines logo]()
$334
This Delta deal was found by Cheapflights users on 7/8. Clicking the “Pick Dates” 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 9/1712:36 pm
SEA
- COS
2 stops8h 48m
Delta
Mon 9/216:14 pm
COS
- SEA
1 stop4h 51m
Delta
Deal found 7/8![Delta logo]()
$251
This Southwest deal was found by Cheapflights users on 7/7. Clicking the “Pick Dates” 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 9/117:00 am
SEA
- DEN
2 stops8h 45m
Southwest
Tue 9/1511:05 am
DEN
- SEA
1 stop8h 30m
Southwest
Deal found 7/7![Southwest logo]()
$225
This Alaska Airlines deal was found by Cheapflights users on 7/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/2912:21 pm
PAE
- DEN
1 stop5h 11m
Alaska Airlines
Tue 9/18:08 am
DEN
- PAE
1 stop4h 33m
Alaska Airlines
Deal found 7/10![Alaska Airlines logo]()
$305
This United Airlines deal was found by Cheapflights users on 7/11. Clicking the “Pick Dates” 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 7/305:00 am
SEA
- GJT
1 stop6h 31m
United Airlines
Tue 8/41:33 pm
GJT
- SEA
1 stop5h 26m
United Airlines
Deal found 7/11![United Airlines logo]()
$339
This Delta deal was found by Cheapflights users on 7/11. Clicking the “Pick Dates” 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 12/67:40 pm
SEA
- DEN
Nonstop2h 48m
Delta
Sat 12/1212:20 pm
DEN
- SEA
Nonstop3h 11m
Delta
Deal found 7/11![Delta logo]()
$263
This Southwest deal was found by Cheapflights users on 7/10. Clicking the “Pick Dates” 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 10/165:20 am
PDX
- COS
1 stop7h 05m
Southwest
Tue 10/206:30 am
COS
- PDX
1 stop6h 05m
Southwest
Deal found 7/10![Southwest logo]()
$229
This United Airlines deal was found by Cheapflights users on 7/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/314:18 pm
GEG
- DEN
Nonstop2h 25m
United Airlines
Tue 8/47:40 pm
DEN
- GEG
Nonstop2h 25m
United Airlines
Deal found 7/7![United Airlines logo]()
$349
Last-minute flights from Washington to ColoradoDiscover last-minute flight deals from Washington to Colorado. Data last updated July 12, 2026 and is based on user searches.
Discover last-minute flight deals from Washington to Colorado. Data last updated July 12, 2026 and is based on user searches.
This Cheapflightsfares deal was found by Cheapflights users on 7/10. Clicking the “Pick Dates” 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 7/237:06 pm
SEA
- DEN
Nonstop2h 52m
Frontier
Tue 7/287:13 am
DEN
- SEA
Nonstop3h 04m
Frontier
Deal found 7/10![Frontier logo]()
$197
This Super.com deal was found by Cheapflights users on 7/9. Clicking the “Pick Dates” 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 7/247:06 pm
SEA
- DEN
Nonstop2h 52m
Frontier
Mon 7/277:13 am
DEN
- SEA
Nonstop3h 04m
Frontier
Deal found 7/9![Frontier logo]()
$200
This Frontier deal was found by Cheapflights users on 7/9. Clicking the “Pick Dates” 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 8/27:06 pm
SEA
- DEN
Nonstop2h 52m
Frontier
Sat 8/87:00 am
DEN
- SEA
Nonstop3h 04m
Frontier
Deal found 7/9![Frontier logo]()
$198
This Delta deal was found by Cheapflights users on 7/10. Clicking the “Pick Dates” 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 8/78:40 am
SEA
- DEN
Nonstop2h 46m
Delta
Fri 8/286:43 pm
DEN
- SEA
Nonstop3h 02m
Delta
Deal found 7/10![Delta logo]()
$195
This Southwest deal was found by Cheapflights users on 7/10. Clicking the “Pick Dates” 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 8/711:50 am
SEA
- DEN
1 stop5h 55m
Southwest
Tue 8/112:40 pm
DEN
- SEA
2 stops7h 35m
Southwest
Deal found 7/10![Southwest logo]()
$199
This Delta deal was found by Cheapflights users on 7/10. Clicking the “Pick Dates” 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 8/1212:36 pm
SEA
- COS
2 stops8h 52m
Delta
Sat 8/226:16 pm
COS
- SEA
1 stop4h 49m
Delta
Deal found 7/10![Delta logo]()
$178
This Southwest deal was found by Cheapflights users on 7/8. Clicking the “Pick Dates” 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 8/136:15 am
SEA
- COS
1 stop7h 00m
Southwest
Mon 8/172:15 pm
COS
- SEA
1 stop6h 20m
Southwest
Deal found 7/8![Southwest logo]()
$173
This Southwest deal was found by Cheapflights users on 7/9. Clicking the “Pick Dates” 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 8/135:15 pm
PDX
- DEN
1 stop4h 50m
Southwest
Sat 8/156:10 am
DEN
- PDX
1 stop7h 40m
Southwest
Deal found 7/9![Southwest logo]()
$199
This Southwest deal was found by Cheapflights users on 7/7. Clicking the “Pick Dates” 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 8/206:05 am
PDX
- DEN
Nonstop2h 25m
Southwest
Mon 8/244:10 pm
DEN
- PDX
2 stops7h 00m
Southwest
Deal found 7/7![Southwest logo]()
$200
This Kiwi.com deal was found by Cheapflights users on 7/11. Clicking the “Pick Dates” 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 8/2212:20 pm
PDX
- DEN
Nonstop2h 43m
Frontier
Mon 8/246:45 am
DEN
- PDX
2 stops11h 36m
Frontier
Deal found 7/11![Frontier logo]()
$197
This Southwest deal was found by Cheapflights users on 7/9. Clicking the “Pick Dates” 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 8/266:25 am
SEA
- COS
2 stops8h 15m
Southwest
Mon 8/316:30 am
COS
- SEA
2 stops7h 20m
Southwest
Deal found 7/9![Southwest logo]()
$183
This Southwest deal was found by Cheapflights users on 7/9. Clicking the “Pick Dates” 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 8/264:00 pm
PDX
- DEN
Nonstop2h 30m
Southwest
Sat 9/121:35 pm
DEN
- PDX
2 stops7h 25m
Southwest
Deal found 7/9![Southwest logo]()
$198
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 July 12, 2026.
Search for one-way flight options from Washington to Colorado. Find affordable one-way fares based on user searches. Data last updated July 12, 2026.
This Kiwi.com deal was found by Cheapflights users on 7/8. Clicking the “Pick Dates” 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 9/1310:09 am
GEG
- DEN
1 stop16h 43m
Multiple Airlines
Deal found 7/8![Multiple Airlines logo]()
$87
This Southwest deal was found by Cheapflights users on 7/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/55:30 am
SEA
- COS
1 stop5h 40m
Southwest
Deal found 7/8![Southwest logo]()
$87
This Delta deal was found by Cheapflights users on 7/8. Clicking the “Pick Dates” 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 9/2912:36 pm
SEA
- COS
2 stops8h 48m
Delta
Deal found 7/8![Delta logo]()
$92
This Kiwi.com deal was found by Cheapflights users on 7/9. Clicking the “Pick Dates” 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 9/1010:09 am
GEG
- DEN
1 stop7h 31m
Multiple Airlines
Deal found 7/9![Multiple Airlines logo]()
$93
This Delta deal was found by Cheapflights users on 7/8. Clicking the “Pick Dates” 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 8/55:08 pm
PDX
- COS
1 stop4h 20m
Delta
Deal found 7/8![Delta logo]()
$102
This United Airlines deal was found by Cheapflights users on 7/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/265:00 am
SEA
- COS
1 stop7h 17m
United Airlines
Deal found 7/7![United Airlines logo]()
$108
This Kiwi.com deal was found by Cheapflights users on 7/11. Clicking the “Pick Dates” 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 8/99:14 pm
GEG
- DEN
1 stop10h 51m
Multiple Airlines
Deal found 7/11![Multiple Airlines logo]()
$109
This Trip.com deal was found by Cheapflights users on 7/9. Clicking the “Pick Dates” 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.
Thu 8/2010:12 am
GEG
- DEN
1 stop10h 29m
Multiple Airlines
Deal found 7/9![Multiple Airlines logo]()
$111
This Kiwi.com deal was found by Cheapflights users on 7/12. Clicking the “Pick Dates” 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 10/149:16 pm
SEA
- GJT
1 stop13h 44m
Multiple Airlines
Deal found 7/12![Multiple Airlines logo]()
$112
This Southwest deal was found by Cheapflights users on 7/10. Clicking the “Pick Dates” 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 9/229:25 am
SEA
- COS
2 stops8h 40m
Southwest
Deal found 7/10![Southwest logo]()
$117
This Southwest deal was found by Cheapflights users on 7/10. Clicking the “Pick Dates” 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 8/77:35 pm
PDX
- DEN
Nonstop2h 30m
Southwest
Deal found 7/10![Southwest logo]()
$118
This United Airlines deal was found by Cheapflights users on 7/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/65:00 am
GEG
- DEN
Nonstop2h 20m
United Airlines
Deal found 7/9![United Airlines logo]()
$119
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 July 12, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $173 (Southwest) |
One-way from | $87 (Kiwi.com) |
Popular in | June |
Cheapest in | January |
Average price | $267 |
Good round-trip deal | $297 or less |
Good one-way deal | $176 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 July 12, 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
SeattleColorado Springs
SEA - COS
SEACOS
Seattle/Tacoma Intl
Wed 9/23
6:25 am-3:40 pm
2 stops8h 15m
Colorado Springs
Wed 9/30
4:15 pm-11:05 pm
1 stop7h 50m
$178
SeattleColorado Springs
SEA - COS
SEACOS
Seattle/Tacoma Intl
Thu 8/13
6:15 am-2:15 pm
1 stop7h 00m
Colorado Springs
Mon 8/17
2:15 pm-10:55 pm
2 stops9h 40m
$178
SeattleColorado Springs
SEA - COS
SEACOS
Seattle/Tacoma Intl
Wed 8/26
6:25 am-3:40 pm
2 stops8h 15m
Colorado Springs
Mon 8/31
6:30 am-12:50 pm
2 stops7h 20m
$183
PortlandDenver
PDX - DEN
PDXDEN
Portland
Mon 8/24
7:35 pm-11:05 pm
Nonstop2h 30m
Denver Intl
Mon 8/31
4:10 pm-10:10 pm
2 stops7h 00m
$198
PortlandDenver
PDX - DEN
PDXDEN
Portland
Thu 8/27
12:40 pm-8:05 pm
2 stops6h 25m
Denver Intl
Tue 9/1
1:25 pm-3:00 pm
Nonstop2h 35m
$200
PortlandDenver
PDX - DEN
PDXDEN
Portland
Mon 8/24
5:45 am-12:10 pm
1 stop5h 25m
Denver Intl
Wed 8/26
4:00 pm-7:50 pm
1 stop4h 50m
$200
PortlandDenver
PDX - DEN
PDXDEN
Portland
Tue 8/11
9:45 am-3:02 pm
1 stop4h 17m
Denver Intl
Mon 8/17
6:28 pm-11:39 pm
1 stop6h 11m
$203
PortlandDenver
PDX - DEN
PDXDEN
Portland
Tue 8/25
9:29 am-5:48 pm
1 stop7h 19m
Denver Intl
Thu 8/27
1:21 pm-7:44 pm
1 stop7h 23m
$203
PortlandDenver
PDX - DEN
PDXDEN
Portland
Thu 9/10
5:50 pm-11:47 pm
1 stop4h 57m
Denver Intl
Tue 9/15
5:30 am-8:41 am
1 stop4h 11m
$203
PortlandDenver
PDX - DEN
PDXDEN
Portland
Sat 9/19
11:20 am-5:30 pm
1 stop5h 10m
Denver Intl
Thu 9/24
4:10 pm-10:10 pm
2 stops7h 00m
$210
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.
GEG-DEN
SEA-COS
PDX-COS
SEA-GJT
PDX-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
GEG-DEN
SEA-COS
PDX-COS
SEA-GJT
What is the cheapest month to book a flight from State of Washington to Colorado?
Currently, October is the cheapest month in which you can book a flight from State of Washington to Colorado (average of $199). Flying from State of Washington to Colorado in June is currently the most expensive (average of $346). 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 July 12, 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 July 12, 2026.
The most flights from USWA to USCO are scheduled on a Friday (42 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (20 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 July 11, 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. Sunday 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 July 12, 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.
Boarding
8.1
Food
7.1
Crew
8.5
Comfort
7.8
Overall
7.9
Entertainment
7.0
Reviews
1 / 20
4.0
OkayAnonymous,Jun 2026
SEA - RNO
Boarding
8.1
Food
7.1
Crew
8.5
Comfort
7.8
Overall
7.9
Entertainment
7.0
Reviews
1 / 20
4.0
OkayAnonymous,Jun 2026
SEA - RNO
Boarding
8.1
Food
7.1
Crew
8.5
Comfort
7.8
Overall
7.9
Entertainment
7.0
Reviews
1 / 20
4.0
OkayAnonymous,Jun 2026
SEA - RNO
Boarding
8.1
Food
7.1
Crew
8.5
Comfort
7.8
Overall
7.9
Entertainment
7.0
Reviews
1 / 20
4.0
OkayAnonymous,Jun 2026
SEA - RNO
Boarding
8.1
Food
7.1
Crew
8.5
Comfort
7.8
Overall
7.9
Entertainment
7.0
Reviews
1 / 20
4.0
OkayAnonymous,Jun 2026
SEA - RNO
Boarding
8.1
Food
7.1
Crew
8.5
Comfort
7.8
Overall
7.9
Entertainment
7.0
Reviews
1 / 20
4.0
OkayAnonymous,Jun 2026
SEA - RNO
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 July 12, 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 July 12, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$56 | Average$164 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$69 | Average$207 | FlexibilityNo cancel fee | On-time85% | |
| Cheapest$91 | Average$292 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$108 | Average$348 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$117 | Average$402 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$131 | Average$421 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$200 | Average$328 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$228 | Average$450 | FlexibilityNo cancel fee | On-time71% |