$59+ Cheap flights from Seattle (SEA) 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 5/27. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — DEN
May 29 — Jun 51
Round-trip
1 adult, Economy
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Find cheap flights from Seattle to Colorado with Cheapflights
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Cheapest flights from Seattle to ColoradoExplore the most affordable flight options available from Seattle to Colorado. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 29, 2026.
Explore the most affordable flight options available from Seattle to Colorado. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 29, 2026.
This Super.com deal was found by Cheapflights users on 4/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/207:50 pm
SEA
- DEN
Nonstop3h 04m
Frontier
Sun 5/248:41 am
DEN
- SEA
1 stop11h 24m
Frontier
Deal found 4/24![Frontier logo]()
$114
This Kiwi.com deal was found by Cheapflights users on 4/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/227:50 pm
SEA
- DEN
Nonstop3h 04m
Frontier
Wed 5/278:00 am
DEN
- SEA
Nonstop3h 06m
Frontier
Deal found 4/24![Frontier logo]()
$117
This Kiwi.com deal was found by Cheapflights users on 4/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/2811:21 am
SEA
- DEN
1 stop12h 17m
Frontier
Wed 6/38:00 am
DEN
- SEA
Nonstop3h 06m
Frontier
Deal found 4/27![Frontier logo]()
$118
This Cheapflightsfares deal was found by Cheapflights users on 4/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/2011:06 am
SEA
- DEN
1 stop21h 58m
Frontier
Fri 5/298:00 am
DEN
- SEA
Nonstop3h 06m
Frontier
Deal found 4/27![Frontier logo]()
$123
This Kiwi.com deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/311:21 am
SEA
- DEN
1 stop7h 45m
Frontier
Sun 6/78:00 am
DEN
- SEA
Nonstop3h 06m
Frontier
Deal found 4/28![Frontier logo]()
$124
This Cheapflightsfares deal was found by Cheapflights users on 4/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/247:41 pm
SEA
- DEN
Nonstop2h 55m
Frontier
Tue 9/17:45 am
DEN
- SEA
Nonstop3h 03m
Frontier
Deal found 4/25![Frontier logo]()
$125
This Kiwi.com deal was found by Cheapflights users on 4/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/37:50 pm
SEA
- DEN
Nonstop3h 04m
Frontier
Mon 6/810:29 pm
DEN
- SEA
1 stop13h 06m
Frontier
Deal found 4/24![Frontier logo]()
$126
This Super.com deal was found by Cheapflights users on 4/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/197:50 pm
SEA
- DEN
Nonstop3h 04m
Frontier
Wed 5/207:50 am
DEN
- SEA
Nonstop2h 59m
Frontier
Deal found 4/27![Frontier logo]()
$127
This Kiwi.com deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/318:20 pm
SEA
- DEN
1 stop6h 05m
Frontier
Tue 6/28:00 am
DEN
- SEA
Nonstop3h 06m
Frontier
Deal found 4/28![Frontier logo]()
$129
This United Airlines deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/156:00 pm
SEA
- COS
1 stop4h 49m
United Airlines
Sat 9/1912:51 pm
COS
- SEA
1 stop5h 54m
United Airlines
Deal found 4/28![United Airlines logo]()
$217
This Southwest deal was found by Cheapflights users on 4/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/288:00 am
SEA
- COS
1 stop6h 30m
Southwest
Thu 6/49:05 pm
COS
- SEA
1 stop5h 35m
Southwest
Deal found 4/27![Southwest logo]()
$237
This Delta deal was found by Cheapflights users on 4/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/39:40 am
SEA
- COS
1 stop6h 34m
Delta
Tue 10/65:55 pm
COS
- SEA
1 stop5h 10m
Delta
Deal found 4/25![Delta logo]()
$238
Best flights from Seattle to ColoradoDiscover carefully curated flight deals from Seattle to Colorado that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 29, 2026.
Discover carefully curated flight deals from Seattle to Colorado that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 29, 2026.
This Southwest deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/115:15 am
SEA
- DEN
Nonstop2h 35m
Southwest
Mon 6/151:25 pm
DEN
- SEA
2 stops7h 05m
Southwest
Deal found 4/28![Southwest logo]()
$272
This Alaska Airlines deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/23:02 pm
SEA
- DEN
1 stop7h 47m
Alaska Airlines
Sat 6/62:19 pm
DEN
- SEA
1 stop7h 09m
Alaska Airlines
Deal found 4/28![Alaska Airlines logo]()
$286
This United Airlines deal was found by Cheapflights users on 4/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/125:02 am
SEA
- HDN
1 stop6h 31m
United Airlines
Sat 5/161:40 pm
HDN
- SEA
2 stops12h 32m
United Airlines
Deal found 4/27![United Airlines logo]()
$292
This Delta deal was found by Cheapflights users on 4/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/2110:15 am
SEA
- ASE
1 stop8h 50m
Delta
Wed 5/2712:00 pm
ASE
- SEA
1 stop5h 53m
Delta
Deal found 4/27![Delta logo]()
$309
This American Airlines deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/1611:22 pm
SEA
- EGE
1 stop9h 31m
American Airlines
Sun 7/197:50 am
EGE
- SEA
1 stop9h 49m
American Airlines
Deal found 4/28![American Airlines logo]()
$454
This Southwest deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/196:50 am
SEA
- DEN
1 stop5h 50m
Southwest
Wed 5/202:50 pm
DEN
- SEA
2 stops7h 10m
Southwest
Deal found 4/28![Southwest logo]()
$283
This Delta deal was found by Cheapflights users on 4/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/1211:05 am
SEA
- GJT
1 stop6h 12m
Delta
Mon 7/206:56 pm
GJT
- SEA
1 stop4h 04m
Delta
Deal found 4/25![Delta logo]()
$315
This Southwest deal was found by Cheapflights users on 4/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/2611:40 am
SEA
- DEN
2 stops8h 00m
Southwest
Tue 6/22:50 pm
DEN
- SEA
2 stops7h 10m
Southwest
Deal found 4/26![Southwest logo]()
$293
This United Airlines deal was found by Cheapflights users on 4/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/98:38 am
SEA
- HDN
2 stops10h 39m
United Airlines
Wed 5/131:40 pm
HDN
- SEA
2 stops10h 49m
United Airlines
Deal found 4/24![United Airlines logo]()
$326
This Southwest deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/105:35 pm
SEA
- COS
1 stop6h 40m
Southwest
Sun 7/126:00 am
COS
- SEA
1 stop12h 40m
Southwest
Deal found 4/29![Southwest logo]()
$300
This Delta deal was found by Cheapflights users on 4/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/2212:40 pm
SEA
- ASE
1 stop6h 25m
Delta
Wed 5/2712:00 pm
ASE
- SEA
1 stop5h 53m
Delta
Deal found 4/25![Delta logo]()
$334
This United Airlines deal was found by Cheapflights users on 4/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/53:33 pm
SEA
- DEN
1 stop7h 10m
United Airlines
Sun 6/76:00 am
DEN
- SEA
Nonstop3h 00m
United Airlines
Deal found 4/26![United Airlines logo]()
$337
This Southwest deal was found by Cheapflights users on 4/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/286:30 am
SEA
- DEN
1 stop5h 30m
Southwest
Mon 6/13:20 pm
DEN
- SEA
2 stops8h 45m
Southwest
Deal found 4/25![Southwest logo]()
$307
This United Airlines deal was found by Cheapflights users on 4/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/25:00 am
SEA
- HDN
1 stop6h 24m
United Airlines
Sat 6/61:20 pm
HDN
- SEA
2 stops10h 59m
United Airlines
Deal found 4/27![United Airlines logo]()
$356
This Alaska Airlines deal was found by Cheapflights users on 4/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/23:59 pm
SEA
- GJT
1 stop6h 44m
Alaska Airlines
Mon 6/812:05 pm
GJT
- SEA
1 stop8h 02m
Alaska Airlines
Deal found 4/25![Alaska Airlines logo]()
$453
This Southwest deal was found by Cheapflights users on 4/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/137:50 am
SEA
- DEN
2 stops8h 20m
Southwest
Wed 5/205:05 pm
DEN
- SEA
1 stop7h 50m
Southwest
Deal found 4/24![Southwest logo]()
$312
This United Airlines deal was found by Cheapflights users on 4/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/2712:50 pm
SEA
- HDN
1 stop6h 27m
United Airlines
Sat 5/303:20 pm
HDN
- SEA
2 stops9h 12m
United Airlines
Deal found 4/26![United Airlines logo]()
$356
This Southwest deal was found by Cheapflights users on 4/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/166:15 am
SEA
- DEN
1 stop6h 15m
Southwest
Tue 6/167:25 pm
DEN
- SEA
1 stop5h 05m
Southwest
Deal found 4/27![Southwest logo]()
$315
This United Airlines deal was found by Cheapflights users on 4/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/95:02 am
SEA
- GJT
1 stop4h 41m
United Airlines
Wed 5/135:30 am
GJT
- SEA
1 stop5h 10m
United Airlines
Deal found 4/24![United Airlines logo]()
$356
This Delta deal was found by Cheapflights users on 4/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/165:30 am
SEA
- COS
1 stop4h 45m
Delta
Mon 5/1811:55 am
COS
- SEA
2 stops10h 45m
Delta
Deal found 4/24![Delta logo]()
$446
This Alaska Airlines deal was found by Cheapflights users on 4/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/169:59 am
SEA
- GJT
1 stop7h 24m
Alaska Airlines
Sun 7/198:35 am
GJT
- SEA
1 stop6h 55m
Alaska Airlines
Deal found 4/26![Alaska Airlines logo]()
$500
This Southwest deal was found by Cheapflights users on 4/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/209:20 am
SEA
- DEN
1 stop6h 05m
Southwest
Sun 5/241:40 pm
DEN
- SEA
2 stops8h 40m
Southwest
Deal found 4/24![Southwest logo]()
$317
This United Airlines deal was found by Cheapflights users on 4/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/25:00 am
SEA
- COS
1 stop4h 46m
United Airlines
Sat 6/611:31 am
COS
- SEA
2 stops11h 28m
United Airlines
Deal found 4/26![United Airlines logo]()
$356
This Southwest deal was found by Cheapflights users on 4/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/135:30 am
SEA
- DEN
2 stops7h 20m
Southwest
Wed 6/176:25 pm
DEN
- SEA
1 stop7h 15m
Southwest
Deal found 4/24![Southwest logo]()
$320
This United Airlines deal was found by Cheapflights users on 4/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/225:00 am
SEA
- HDN
1 stop6h 18m
United Airlines
Sat 7/257:13 am
HDN
- SEA
2 stops13h 25m
United Airlines
Deal found 4/27![United Airlines logo]()
$370
This American Airlines deal was found by Cheapflights users on 4/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/166:20 am
SEA
- EGE
2 stops11h 44m
American Airlines
Sun 6/217:50 am
EGE
- SEA
1 stop9h 54m
American Airlines
Deal found 4/27![American Airlines logo]()
$678
This Southwest deal was found by Cheapflights users on 4/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/135:30 am
SEA
- DEN
2 stops7h 20m
Southwest
Tue 6/166:15 am
DEN
- SEA
2 stops8h 20m
Southwest
Deal found 4/27![Southwest logo]()
$325
This United Airlines deal was found by Cheapflights users on 4/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/278:58 am
SEA
- GUC
1 stop4h 41m
United Airlines
Sat 5/301:25 pm
GUC
- SEA
2 stops8h 28m
United Airlines
Deal found 4/26![United Airlines logo]()
$384
This Southwest deal was found by Cheapflights users on 4/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/25:35 pm
SEA
- DEN
1 stop6h 05m
Southwest
Wed 7/85:30 pm
DEN
- SEA
2 stops7h 00m
Southwest
Deal found 4/25![Southwest logo]()
$340
This United Airlines deal was found by Cheapflights users on 4/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/2712:50 pm
SEA
- ASE
1 stop6h 21m
United Airlines
Sat 5/304:42 pm
ASE
- SEA
1 stop6h 26m
United Airlines
Deal found 4/27![United Airlines logo]()
$389
Last-minute flights from Seattle to ColoradoDiscover last-minute flight deals from Seattle to Colorado. Data last updated April 29, 2026 and is based on user searches.
Discover last-minute flight deals from Seattle to Colorado. Data last updated April 29, 2026 and is based on user searches.
This Frontier deal was found by Cheapflights users on 4/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/157:50 pm
SEA
- DEN
Nonstop3h 04m
Frontier
Sun 5/248:41 am
DEN
- SEA
1 stop11h 24m
Frontier
Deal found 4/24![Frontier logo]()
$134
This Super.com deal was found by Cheapflights users on 4/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/157:50 pm
SEA
- DEN
Nonstop3h 04m
Frontier
Tue 5/197:50 am
DEN
- SEA
Nonstop2h 59m
Frontier
Deal found 4/26![Frontier logo]()
$137
This Super.com deal was found by Cheapflights users on 4/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/187:50 pm
SEA
- DEN
Nonstop3h 04m
Frontier
Wed 6/107:45 am
DEN
- SEA
Nonstop3h 03m
Frontier
Deal found 4/24![Frontier logo]()
$136
This Super.com deal was found by Cheapflights users on 4/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/197:50 pm
SEA
- DEN
Nonstop3h 04m
Frontier
Wed 5/207:50 am
DEN
- SEA
Nonstop2h 59m
Frontier
Deal found 4/27![Frontier logo]()
$127
This Super.com deal was found by Cheapflights users on 4/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/207:50 pm
SEA
- DEN
Nonstop3h 04m
Frontier
Sun 5/248:41 am
DEN
- SEA
1 stop11h 24m
Frontier
Deal found 4/24![Frontier logo]()
$114
This Cheapflightsfares deal was found by Cheapflights users on 4/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/2011:06 am
SEA
- DEN
1 stop21h 58m
Frontier
Fri 5/298:00 am
DEN
- SEA
Nonstop3h 06m
Frontier
Deal found 4/27![Frontier logo]()
$123
This Kiwi.com deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/207:50 pm
SEA
- DEN
Nonstop3h 04m
Frontier
Wed 5/277:20 am
DEN
- SEA
1 stop12h 15m
Frontier
Deal found 4/28![Frontier logo]()
$131
This Kiwi.com deal was found by Cheapflights users on 4/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/227:50 pm
SEA
- DEN
Nonstop3h 04m
Frontier
Wed 5/278:00 am
DEN
- SEA
Nonstop3h 06m
Frontier
Deal found 4/24![Frontier logo]()
$117
This Kiwi.com deal was found by Cheapflights users on 4/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/2811:21 am
SEA
- DEN
1 stop12h 17m
Frontier
Wed 6/38:00 am
DEN
- SEA
Nonstop3h 06m
Frontier
Deal found 4/27![Frontier logo]()
$118
This Southwest deal was found by Cheapflights users on 4/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/288:00 am
SEA
- COS
1 stop6h 30m
Southwest
Thu 6/49:05 pm
COS
- SEA
1 stop5h 35m
Southwest
Deal found 4/27![Southwest logo]()
$237
This Kiwi.com deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/298:20 pm
SEA
- DEN
1 stop6h 05m
Frontier
Tue 6/28:00 am
DEN
- SEA
Nonstop3h 06m
Frontier
Deal found 4/28![Frontier logo]()
$135
This Kiwi.com deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/318:20 pm
SEA
- DEN
1 stop6h 05m
Frontier
Tue 6/28:00 am
DEN
- SEA
Nonstop3h 06m
Frontier
Deal found 4/28![Frontier logo]()
$129
One-way flights from Seattle to ColoradoSearch for one-way flight options from Seattle to Colorado. Find affordable one-way fares based on user searches. Data last updated April 29, 2026.
Search for one-way flight options from Seattle to Colorado. Find affordable one-way fares based on user searches. Data last updated April 29, 2026.
This Trip.com deal was found by Cheapflights users on 4/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/2711:21 am
SEA
- DEN
1 stop7h 45m
Frontier
Deal found 4/25![Frontier logo]()
$59
This Kiwi.com deal was found by Cheapflights users on 4/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/2011:06 am
SEA
- DEN
1 stop21h 58m
Frontier
Deal found 4/27![Frontier logo]()
$62
This Cheapflightsfares deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/227:50 pm
SEA
- DEN
Nonstop3h 04m
Frontier
Deal found 4/28![Frontier logo]()
$64
This Kiwi.com deal was found by Cheapflights users on 4/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/1911:06 am
SEA
- DEN
1 stop21h 58m
Frontier
Deal found 4/26![Frontier logo]()
$65
This Kiwi.com deal was found by Cheapflights users on 4/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/2811:21 am
SEA
- DEN
1 stop7h 45m
Frontier
Deal found 4/26![Frontier logo]()
$67
This Super.com deal was found by Cheapflights users on 4/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/217:50 pm
SEA
- DEN
Nonstop3h 04m
Frontier
Deal found 4/24![Frontier logo]()
$74
This Kiwi.com deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/2411:51 am
SEA
- DEN
1 stop20h 31m
Frontier
Deal found 4/28![Frontier logo]()
$82
This Cheapflightsfares deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/17:41 pm
SEA
- DEN
Nonstop2h 55m
Frontier
Deal found 4/29![Frontier logo]()
$83
This Delta deal was found by Cheapflights users on 4/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/245:30 am
SEA
- COS
1 stop4h 45m
Delta
Deal found 4/25![Delta logo]()
$109
This Delta deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/2712:40 pm
SEA
- COS
2 stops8h 42m
Delta
Deal found 4/29![Delta logo]()
$114
This Delta deal was found by Cheapflights users on 4/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/255:30 am
SEA
- COS
1 stop4h 45m
Delta
Deal found 4/25![Delta logo]()
$129
This American Airlines deal was found by Cheapflights users on 4/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/275:10 am
SEA
- MTJ
1 stop7h 20m
American Airlines
Deal found 4/27![American Airlines logo]()
$136
Find flight deals from Seattle to Colorado
Keep the following information in mind while searching for Seattle to Colorado flight deals. Data was last updated April 29, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $118 (Kiwi.com) |
One-way from | $59 (Trip.com) |
Popular in | June |
Cheapest in | January |
Average price | $237 |
Good round-trip deal | $256 or less |
Good one-way deal | $149 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from Seattle 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 April 29, 2026.
Use the filters below to find and compare flights from Seattle to Colorado that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
Quickest round-trip
SeattleDenver
SEA - DEN
SEADEN
Seattle/Tacoma Intl
Thu 6/11
5:15 am-8:50 am
Nonstop2h 35m
Denver Intl
Mon 6/15
1:25 pm-7:30 pm
2 stops7h 05m
$272
SeattleDenver
SEA - DEN
SEADEN
Seattle/Tacoma Intl
Tue 5/19
6:50 am-1:40 pm
1 stop5h 50m
Denver Intl
Wed 5/20
2:50 pm-9:00 pm
2 stops7h 10m
$283
SeattleDenver
SEA - DEN
SEADEN
Seattle/Tacoma Intl
Tue 6/2
3:02 pm-11:49 pm
1 stop7h 47m
Denver Intl
Sat 6/6
2:19 pm-8:28 pm
1 stop7h 09m
$286
SeattleHayden
SEA - HDN
SEAHDN
Seattle/Tacoma Intl
Tue 5/12
5:02 am-12:33 pm
1 stop6h 31m
Hayden Yampa Valley
Sat 5/16
1:40 pm-1:12 am
2 stops12h 32m
$292
SeattleDenver
SEA - DEN
SEADEN
Seattle/Tacoma Intl
Tue 5/26
11:40 am-8:40 pm
2 stops8h 00m
Denver Intl
Tue 6/2
2:50 pm-9:00 pm
2 stops7h 10m
$293
SeattleColorado Springs
SEA - COS
SEACOS
Seattle/Tacoma Intl
Fri 7/10
5:35 pm-1:15 am
1 stop6h 40m
Colorado Springs
Sun 7/12
6:00 am-5:40 pm
1 stop12h 40m
$300
SeattleDenver
SEA - DEN
SEADEN
Seattle/Tacoma Intl
Thu 5/28
6:30 am-1:00 pm
1 stop5h 30m
Denver Intl
Mon 6/1
3:20 pm-11:05 pm
2 stops8h 45m
$307
SeattleAspen
SEA - ASE
SEAASE
Seattle/Tacoma Intl
Thu 5/21
10:15 am-8:05 pm
1 stop8h 50m
Aspen Pitkin County
Wed 5/27
12:00 pm-4:53 pm
1 stop5h 53m
$309
SeattleDenver
SEA - DEN
SEADEN
Seattle/Tacoma Intl
Wed 5/13
7:50 am-5:10 pm
2 stops8h 20m
Denver Intl
Wed 5/20
5:05 pm-11:55 pm
1 stop7h 50m
$312
SeattleGrand Junction
SEA - GJT
SEAGJT
Seattle/Tacoma Intl
Sun 7/12
11:05 am-6:17 pm
1 stop6h 12m
Grand Junction Regnl
Mon 7/20
6:56 pm-10:00 pm
1 stop4h 04m
$315
Showing 1-10 of 60 resultsSorted by cheapest first
Best time to book a flight from Seattle to Colorado
Have a flexible travel schedule? Discover the best time to fly to Colorado from Seattle with our price prediction graph.
SEA-DEN
SEA-COS
SEA-HDN
SEA-ASE
SEA-EGE
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 Seattle to Colorado
SEA-USCO
SEA-DEN
SEA-COS
SEA-HDN
SEA-ASE
How far ahead should I book a flight from Seattle to Colorado?
The price you pay for your flight from Seattle to Colorado may vary depending on when you book. For the best chance of a lower fare, look to book 65 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.
What is the cheapest month to book a flight from Seattle to Colorado?
Currently, October is the cheapest month in which you can book a flight from Seattle to Colorado (average of $244). Flying from Seattle to Colorado in March is currently the most expensive (average of $412). 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 SEA to CO?
Find hourly flight availability from Seattle 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 April 29, 2026.
A simple way to save on the total cost of your ticket is to fly from Seattle to Colorado in the evening. If you’re flexible enough to do this you can expect to save up to 48% on your trip compared to booking a flight in the morning.
What is the cheapest day to fly from Seattle to Colorado?
Use this chart to determine the cheapest time to fly round-trip from Seattle to Colorado. Price data was last updated on April 25, 2026.
Travelers seeking maximum savings on their Seattle to Colorado flight should consider departing on Friday evenings when fares are most often at their lowest. Sunday mornings flights should be avoided if possible as fares are typically the most expensive at this time.
Weekly flight availability from Seattle to Colorado
Explore weekly flight availability from Seattle 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 April 29, 2026.
The most flights from SEA to USCO are scheduled on a Wednesday (30 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (14 on average).
How much does it cost to fly round-trip from Seattle to Colorado?
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 April 29, 2026.
See what other customers who have flown with Southwest,Alaska Airlines, andDelta from Seattle to Colorado have to say. 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.
Overall
8.0
Boarding
8.1
Food
7.0
Crew
8.6
Comfort
8.0
Entertainment
7.5
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Overall
8.0
Boarding
8.1
Food
7.0
Crew
8.6
Comfort
8.0
Entertainment
7.5
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Overall
8.0
Boarding
8.1
Food
7.0
Crew
8.6
Comfort
8.0
Entertainment
7.5
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Overall
8.0
Boarding
8.1
Food
7.0
Crew
8.6
Comfort
8.0
Entertainment
7.5
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Overall
8.0
Boarding
8.1
Food
7.0
Crew
8.6
Comfort
8.0
Entertainment
7.5
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Overall
8.0
Boarding
8.1
Food
7.0
Crew
8.6
Comfort
8.0
Entertainment
7.5
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Related info for your journey
Find useful and relevant information for your journey from Seattle 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 Seattle to Colorado
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Complete your trip
Complete your trip to Colorado by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Seattle to Colorado by cabin class
Find flights from Seattle to Colorado, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Seattle and Colorado flights
Browse other Seattle and Colorado flight options. Last updated on April 29, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Seattle to Colorado flights
Consider these flights traveling from Seattle to Colorado.
Top 7 airlines flying from Seattle to Colorado
Discover the top 7 airlines that operate flights from Seattle 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 April 29, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$56 | Average$168 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$78 | Average$225 | FlexibilityNo cancel fee | On-time85% | |
| Cheapest$95 | Average$255 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$117 | Average$352 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$117 | Average$300 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$130 | Average$455 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$216 | Average$419 | FlexibilityNo cancel fee | On-time71% |