$53+ 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 5/19. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — DEN
Apr 16 — Apr 231
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 March 17, 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 March 17, 2026.
This Kiwi.com deal was found by Cheapflights users on 3/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/227:12 pm
SEA
- DEN
Nonstop2h 47m
Frontier
Fri 4/2412:51 pm
DEN
- SEA
Nonstop3h 14m
Frontier
Deal found 3/14![Frontier logo]()
$81
This Cheapflightsfares deal was found by Cheapflights users on 3/14. Clicking the “Pick Dates” 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 4/912:42 pm
SEA
- DEN
Nonstop2h 55m
Frontier
Tue 4/147:15 am
DEN
- SEA
Nonstop3h 12m
Frontier
Deal found 3/14![Frontier logo]()
$82
This Expedia deal was found by Cheapflights users on 3/12. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/248:05 pm
SEA
- DEN
Nonstop2h 54m
Multiple Airlines
Mon 4/277:15 am
DEN
- SEA
Nonstop3h 12m
Multiple Airlines
Deal found 3/12![Multiple Airlines logo]()
$87
This Cheapflightsfares deal was found by Cheapflights users on 3/16. Clicking the “Pick Dates” 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 5/44:20 pm
SEA
- DEN
Nonstop2h 51m
Frontier
Mon 5/117:50 am
DEN
- SEA
Nonstop2h 59m
Frontier
Deal found 3/16![Frontier logo]()
$88
This Kiwi.com deal was found by Cheapflights users on 3/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/158:07 pm
SEA
- DEN
Nonstop2h 52m
Frontier
Mon 4/207:15 am
DEN
- SEA
Nonstop3h 12m
Frontier
Deal found 3/14![Frontier logo]()
$91
This Cheapflightsfares deal was found by Cheapflights users on 3/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/187:12 pm
SEA
- DEN
Nonstop2h 47m
Frontier
Mon 4/207:15 am
DEN
- SEA
Nonstop3h 12m
Frontier
Deal found 3/13![Frontier logo]()
$92
This Trip.com deal was found by Cheapflights users on 3/16. Clicking the “Pick Dates” 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 4/234:20 pm
SEA
- DEN
Nonstop2h 51m
Multiple Airlines
Mon 4/276:00 am
DEN
- SEA
Nonstop3h 03m
Multiple Airlines
Deal found 3/16![Multiple Airlines logo]()
$93
This Cheapflightsfares deal was found by Cheapflights users on 3/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/37:12 pm
SEA
- DEN
Nonstop2h 47m
Frontier
Sat 5/167:15 am
DEN
- SEA
Nonstop3h 12m
Frontier
Deal found 3/14![Frontier logo]()
$95
This Expedia deal was found by Cheapflights users on 3/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/147:12 pm
SEA
- DEN
Nonstop2h 47m
Multiple Airlines
Tue 4/217:00 am
DEN
- SEA
Nonstop3h 10m
Multiple Airlines
Deal found 3/15![Multiple Airlines logo]()
$97
This Frontier deal was found by Cheapflights users on 3/16. Clicking the “Pick Dates” 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 4/187:12 pm
SEA
- DEN
Nonstop2h 47m
Frontier
Wed 4/227:15 am
DEN
- SEA
Nonstop3h 12m
Frontier
Deal found 3/16![Frontier logo]()
$98
This Kiwi.com deal was found by Cheapflights users on 3/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/158:07 pm
SEA
- DEN
Nonstop2h 52m
Multiple Airlines
Wed 4/226:00 am
DEN
- SEA
Nonstop3h 03m
Multiple Airlines
Deal found 3/13![Multiple Airlines logo]()
$99
This Trip.com deal was found by Cheapflights users on 3/16. Clicking the “Pick Dates” 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 4/167:12 pm
SEA
- DEN
Nonstop2h 47m
Frontier
Wed 4/227:15 am
DEN
- SEA
Nonstop3h 12m
Frontier
Deal found 3/16![Frontier logo]()
$101
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 March 17, 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 March 17, 2026.
This Delta deal was found by Cheapflights users on 3/15. Clicking the “Pick Dates” 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 4/154:36 pm
SEA
- DEN
1 stop4h 53m
Delta
Wed 4/226:55 am
DEN
- SEA
Nonstop3h 06m
Delta
Deal found 3/15![Delta logo]()
$147
This Southwest deal was found by Cheapflights users on 3/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/35:35 am
SEA
- COS
1 stop6h 35m
Southwest
Wed 5/64:05 pm
COS
- SEA
1 stop7h 25m
Southwest
Deal found 3/13![Southwest logo]()
$157
This Alaska Airlines deal was found by Cheapflights users on 3/15. Clicking the “Pick Dates” 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 5/52:41 pm
SEA
- DEN
1 stop8h 18m
Alaska Airlines
Wed 5/66:45 am
DEN
- SEA
1 stop8h 21m
Alaska Airlines
Deal found 3/15![Alaska Airlines logo]()
$197
This United Airlines deal was found by Cheapflights users on 3/12. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/183:48 pm
SEA
- DEN
Nonstop2h 51m
United Airlines
Tue 4/215:57 pm
DEN
- SEA
1 stop6h 30m
United Airlines
Deal found 3/12![United Airlines logo]()
$203
This Delta deal was found by Cheapflights users on 3/15. Clicking the “Pick Dates” 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 4/87:46 pm
SEA
- DEN
Nonstop2h 46m
Delta
Wed 4/156:55 am
DEN
- SEA
Nonstop3h 06m
Delta
Deal found 3/15![Delta logo]()
$147
This Southwest deal was found by Cheapflights users on 3/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/25:45 am
SEA
- COS
1 stop6h 55m
Southwest
Wed 5/64:05 pm
COS
- SEA
1 stop7h 25m
Southwest
Deal found 3/13![Southwest logo]()
$157
This American Airlines deal was found by Cheapflights users on 3/12. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/155:20 pm
SEA
- DRO
1 stop5h 56m
American Airlines
Wed 8/194:38 pm
DRO
- SEA
1 stop9h 16m
American Airlines
Deal found 3/12![American Airlines logo]()
$339
This United Airlines deal was found by Cheapflights users on 3/16. Clicking the “Pick Dates” 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 5/165:02 am
SEA
- DEN
Nonstop2h 44m
United Airlines
Wed 5/205:20 am
DEN
- SEA
1 stop6h 23m
United Airlines
Deal found 3/16![United Airlines logo]()
$206
This Alaska Airlines deal was found by Cheapflights users on 3/16. Clicking the “Pick Dates” 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.
Mon 5/44:42 pm
SEA
- DEN
1 stop6h 17m
Alaska Airlines
Wed 5/66:45 am
DEN
- SEA
1 stop8h 21m
Alaska Airlines
Deal found 3/16![Alaska Airlines logo]()
$207
This Southwest deal was found by Cheapflights users on 3/15. Clicking the “Pick Dates” 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 4/165:35 pm
SEA
- COS
1 stop5h 15m
Southwest
Mon 4/205:20 pm
COS
- SEA
1 stop7h 10m
Southwest
Deal found 3/15![Southwest logo]()
$236
This United Airlines deal was found by Cheapflights users on 3/11. 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.
Wed 4/83:48 pm
SEA
- GJT
1 stop5h 29m
United Airlines
Wed 4/156:10 pm
GJT
- SEA
1 stop5h 46m
United Airlines
Deal found 3/11![United Airlines logo]()
$251
This Alaska Airlines deal was found by Cheapflights users on 3/12. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/188:30 am
SEA
- DEN
1 stop8h 58m
Alaska Airlines
Wed 4/226:45 am
DEN
- SEA
1 stop17h 08m
Alaska Airlines
Deal found 3/12![Alaska Airlines logo]()
$275
This Southwest deal was found by Cheapflights users on 3/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/12:50 pm
SEA
- DEN
1 stop7h 55m
Southwest
Mon 5/44:00 pm
DEN
- SEA
2 stops7h 30m
Southwest
Deal found 3/16![Southwest logo]()
$261
This United Airlines deal was found by Cheapflights users on 3/12. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/186:30 am
SEA
- ASE
1 stop6h 11m
United Airlines
Mon 7/205:10 pm
ASE
- SEA
1 stop7h 00m
United Airlines
Deal found 3/12![United Airlines logo]()
$289
This Southwest deal was found by Cheapflights users on 3/12. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/275:30 am
SEA
- DEN
Nonstop2h 35m
Southwest
Sun 4/59:10 pm
DEN
- SEA
Nonstop2h 55m
Southwest
Deal found 3/12![Southwest logo]()
$267
This Delta deal was found by Cheapflights users on 3/13. Clicking the “Pick Dates” 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
Wed 5/2011:55 am
COS
- SEA
2 stops9h 35m
Delta
Deal found 3/13![Delta logo]()
$342
This United Airlines deal was found by Cheapflights users on 3/12. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/285:00 am
SEA
- COS
1 stop5h 05m
United Airlines
Wed 4/291:33 pm
COS
- SEA
1 stop5h 27m
United Airlines
Deal found 3/12![United Airlines logo]()
$297
This Delta deal was found by Cheapflights users on 3/16. Clicking the “Pick Dates” 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 8/812:00 pm
SEA
- ASE
1 stop7h 03m
Delta
Wed 8/1212:00 pm
ASE
- SEA
1 stop5h 55m
Delta
Deal found 3/16![Delta logo]()
$379
This United Airlines deal was found by Cheapflights users on 3/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/2512:22 pm
SEA
- DRO
2 stops9h 03m
United Airlines
Tue 4/285:25 am
DRO
- SEA
1 stop5h 21m
United Airlines
Deal found 3/14![United Airlines logo]()
$314
This Southwest deal was found by Cheapflights users on 3/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/16:30 am
SEA
- MTJ
2 stops11h 40m
Southwest
Mon 6/88:00 am
MTJ
- SEA
2 stops9h 55m
Southwest
Deal found 3/15![Southwest logo]()
$345
This United Airlines deal was found by Cheapflights users on 3/12. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/95:00 am
SEA
- HDN
1 stop6h 40m
United Airlines
Thu 4/161:40 pm
HDN
- SEA
1 stop5h 20m
United Airlines
Deal found 3/12![United Airlines logo]()
$319
This Delta deal was found by Cheapflights users on 3/12. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/37:25 am
SEA
- COS
2 stops13h 40m
Delta
Sun 4/58:15 am
COS
- SEA
1 stop7h 39m
Delta
Deal found 3/12![Delta logo]()
$386
This United Airlines deal was found by Cheapflights users on 3/12. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/315:00 am
SEA
- HDN
1 stop6h 40m
United Airlines
Wed 4/11:40 pm
HDN
- SEA
1 stop5h 20m
United Airlines
Deal found 3/12![United Airlines logo]()
$321
This Alaska Airlines deal was found by Cheapflights users on 3/15. Clicking the “Pick Dates” 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.
Mon 3/305:59 pm
SEA
- ASE
1 stop18h 09m
Alaska Airlines
Fri 4/37:24 pm
ASE
- SEA
1 stop14h 35m
Alaska Airlines
Deal found 3/15![Alaska Airlines logo]()
$479
This Southwest deal was found by Cheapflights users on 3/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/236:40 am
SEA
- MTJ
2 stops11h 10m
Southwest
Tue 5/268:45 am
MTJ
- SEA
2 stops10h 15m
Southwest
Deal found 3/15![Southwest logo]()
$385
This United Airlines deal was found by Cheapflights users on 3/12. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/25:05 am
SEA
- GJT
1 stop4h 38m
United Airlines
Wed 5/65:30 am
GJT
- SEA
1 stop5h 10m
United Airlines
Deal found 3/12![United Airlines logo]()
$321
This United Airlines deal was found by Cheapflights users on 3/12. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/32:36 pm
SEA
- MTJ
1 stop4h 34m
United Airlines
Wed 6/107:25 am
MTJ
- SEA
2 stops12h 53m
United Airlines
Deal found 3/12![United Airlines logo]()
$326
This Southwest deal was found by Cheapflights users on 3/12. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/98:00 am
SEA
- HDN
1 stop10h 10m
Southwest
Thu 4/168:40 am
HDN
- SEA
2 stops12h 25m
Southwest
Deal found 3/12![Southwest logo]()
$415
This United Airlines deal was found by Cheapflights users on 3/12. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/262:36 pm
SEA
- DRO
1 stop4h 46m
United Airlines
Sat 5/3011:00 am
DRO
- SEA
2 stops10h 53m
United Airlines
Deal found 3/12![United Airlines logo]()
$328
This United Airlines deal was found by Cheapflights users on 3/12. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/128:45 am
SEA
- MTJ
2 stops10h 33m
United Airlines
Sat 5/161:43 pm
MTJ
- SEA
2 stops10h 46m
United Airlines
Deal found 3/12![United Airlines logo]()
$331
Last-minute flights from Seattle to ColoradoDiscover last-minute flight deals from Seattle to Colorado. Data last updated March 17, 2026 and is based on user searches.
Discover last-minute flight deals from Seattle to Colorado. Data last updated March 17, 2026 and is based on user searches.
This Cheapflightsfares deal was found by Cheapflights users on 3/14. Clicking the “Pick Dates” 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 4/912:42 pm
SEA
- DEN
Nonstop2h 55m
Frontier
Tue 4/147:15 am
DEN
- SEA
Nonstop3h 12m
Frontier
Deal found 3/14![Frontier logo]()
$82
This Expedia deal was found by Cheapflights users on 3/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/147:12 pm
SEA
- DEN
Nonstop2h 47m
Multiple Airlines
Tue 4/217:00 am
DEN
- SEA
Nonstop3h 10m
Multiple Airlines
Deal found 3/15![Multiple Airlines logo]()
$97
This Frontier deal was found by Cheapflights users on 3/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/147:12 pm
SEA
- DEN
Nonstop2h 47m
Frontier
Thu 4/2312:51 pm
DEN
- SEA
Nonstop3h 14m
Frontier
Deal found 3/16![Frontier logo]()
$102
This Super.com deal was found by Cheapflights users on 3/13. Clicking the “Pick Dates” 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 4/147:12 pm
SEA
- DEN
Nonstop2h 47m
Frontier
Sat 4/187:15 am
DEN
- SEA
Nonstop3h 12m
Frontier
Deal found 3/13![Frontier logo]()
$103
This Kiwi.com deal was found by Cheapflights users on 3/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/158:07 pm
SEA
- DEN
Nonstop2h 52m
Frontier
Mon 4/207:15 am
DEN
- SEA
Nonstop3h 12m
Frontier
Deal found 3/14![Frontier logo]()
$91
This Kiwi.com deal was found by Cheapflights users on 3/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/158:07 pm
SEA
- DEN
Nonstop2h 52m
Multiple Airlines
Wed 4/226:00 am
DEN
- SEA
Nonstop3h 03m
Multiple Airlines
Deal found 3/13![Multiple Airlines logo]()
$99
This Trip.com deal was found by Cheapflights users on 3/16. Clicking the “Pick Dates” 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 4/167:12 pm
SEA
- DEN
Nonstop2h 47m
Frontier
Wed 4/227:15 am
DEN
- SEA
Nonstop3h 12m
Frontier
Deal found 3/16![Frontier logo]()
$101
This Cheapflightsfares deal was found by Cheapflights users on 3/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/187:12 pm
SEA
- DEN
Nonstop2h 47m
Frontier
Mon 4/207:15 am
DEN
- SEA
Nonstop3h 12m
Frontier
Deal found 3/13![Frontier logo]()
$92
This Frontier deal was found by Cheapflights users on 3/16. Clicking the “Pick Dates” 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 4/187:12 pm
SEA
- DEN
Nonstop2h 47m
Frontier
Wed 4/227:15 am
DEN
- SEA
Nonstop3h 12m
Frontier
Deal found 3/16![Frontier logo]()
$98
This Kiwi.com deal was found by Cheapflights users on 3/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/227:12 pm
SEA
- DEN
Nonstop2h 47m
Frontier
Fri 4/2412:51 pm
DEN
- SEA
Nonstop3h 14m
Frontier
Deal found 3/14![Frontier logo]()
$81
This Trip.com deal was found by Cheapflights users on 3/16. Clicking the “Pick Dates” 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 4/234:20 pm
SEA
- DEN
Nonstop2h 51m
Multiple Airlines
Mon 4/276:00 am
DEN
- SEA
Nonstop3h 03m
Multiple Airlines
Deal found 3/16![Multiple Airlines logo]()
$93
This Expedia deal was found by Cheapflights users on 3/12. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/248:05 pm
SEA
- DEN
Nonstop2h 54m
Multiple Airlines
Mon 4/277:15 am
DEN
- SEA
Nonstop3h 12m
Multiple Airlines
Deal found 3/12![Multiple Airlines logo]()
$87
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 March 17, 2026.
Search for one-way flight options from Seattle to Colorado. Find affordable one-way fares based on user searches. Data last updated March 17, 2026.
This Kiwi.com deal was found by Cheapflights users on 3/14. Clicking the “Pick Dates” 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 5/197:50 pm
SEA
- DEN
Nonstop3h 04m
Frontier
Deal found 3/14![Frontier logo]()
$53
This CheapOair deal was found by Cheapflights users on 3/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/912:42 pm
SEA
- DEN
Nonstop2h 55m
Frontier
Deal found 3/14![Frontier logo]()
$54
This Delta deal was found by Cheapflights users on 3/12. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/138:00 pm
SEA
- DEN
Nonstop2h 50m
Delta
Deal found 3/12![Delta logo]()
$59
This Southwest deal was found by Cheapflights users on 3/12. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/166:40 am
SEA
- DEN
1 stop5h 10m
Southwest
Deal found 3/12![Southwest logo]()
$64
This Kiwi.com deal was found by Cheapflights users on 3/12. 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.
Mon 4/1310:09 pm
SEA
- DEN
1 stop10h 34m
Frontier
Deal found 3/12![Frontier logo]()
$67
This United Airlines deal was found by Cheapflights users on 3/13. Clicking the “Pick Dates” 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 5/135:05 am
SEA
- DEN
Nonstop2h 44m
United Airlines
Deal found 3/13![United Airlines logo]()
$69
This Delta deal was found by Cheapflights users on 3/12. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/285:35 am
SEA
- COS
1 stop4h 37m
Delta
Deal found 3/12![Delta logo]()
$69
This Cheapflightsfares deal was found by Cheapflights users on 3/12. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/69:14 pm
SEA
- DEN
Nonstop2h 55m
Frontier
Deal found 3/12![Frontier logo]()
$73
This Southwest deal was found by Cheapflights users on 3/12. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/157:50 am
SEA
- DEN
2 stops8h 20m
Southwest
Deal found 3/12![Southwest logo]()
$74
This Kiwi.com deal was found by Cheapflights users on 3/16. Clicking the “Pick Dates” 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 4/199:54 pm
SEA
- DEN
1 stop29h 05m
Frontier
Deal found 3/16![Frontier logo]()
$75
This Delta deal was found by Cheapflights users on 3/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/77:46 pm
SEA
- DEN
Nonstop2h 46m
Delta
Deal found 3/13![Delta logo]()
$79
This Southwest deal was found by Cheapflights users on 3/12. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/2811:40 am
SEA
- COS
2 stops8h 05m
Southwest
Deal found 3/12![Southwest logo]()
$84
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 March 17, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $81 (Kiwi.com) |
One-way from | $53 (Kiwi.com) |
Popular in | June |
Cheapest in | January |
Average price | $219 |
Good round-trip deal | $185 or less |
Good one-way deal | $143 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 March 17, 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
SeattleDenver
SEA - DEN
SEADEN
Seattle/Tacoma Intl
Wed 4/15
4:36 pm-10:29 pm
1 stop4h 53m
Denver Intl
Wed 4/22
6:55 am-9:01 am
Nonstop3h 06m
$147
SeattleDenver
SEA - DEN
SEADEN
Seattle/Tacoma Intl
Wed 4/8
7:46 pm-11:32 pm
Nonstop2h 46m
Denver Intl
Wed 4/15
6:55 am-9:01 am
Nonstop3h 06m
$147
SeattleColorado Springs
SEA - COS
SEACOS
Seattle/Tacoma Intl
Sun 5/3
5:35 am-1:10 pm
1 stop6h 35m
Colorado Springs
Wed 5/6
4:05 pm-10:30 pm
1 stop7h 25m
$157
SeattleColorado Springs
SEA - COS
SEACOS
Seattle/Tacoma Intl
Sat 5/2
5:45 am-1:40 pm
1 stop6h 55m
Colorado Springs
Wed 5/6
4:05 pm-10:30 pm
1 stop7h 25m
$157
SeattleDenver
SEA - DEN
SEADEN
Seattle/Tacoma Intl
Tue 5/5
2:41 pm-11:59 pm
1 stop8h 18m
Denver Intl
Wed 5/6
6:45 am-2:06 pm
1 stop8h 21m
$197
SeattleDenver
SEA - DEN
SEADEN
Seattle/Tacoma Intl
Sat 4/18
3:48 pm-7:39 pm
Nonstop2h 51m
Denver Intl
Tue 4/21
5:57 pm-11:27 pm
1 stop6h 30m
$203
SeattleDenver
SEA - DEN
SEADEN
Seattle/Tacoma Intl
Sat 5/16
5:02 am-8:46 am
Nonstop2h 44m
Denver Intl
Wed 5/20
5:20 am-10:43 am
1 stop6h 23m
$206
SeattleDenver
SEA - DEN
SEADEN
Seattle/Tacoma Intl
Mon 5/4
4:42 pm-11:59 pm
1 stop6h 17m
Denver Intl
Wed 5/6
6:45 am-2:06 pm
1 stop8h 21m
$207
SeattleColorado Springs
SEA - COS
SEACOS
Seattle/Tacoma Intl
Thu 4/16
5:35 pm-11:50 pm
1 stop5h 15m
Colorado Springs
Mon 4/20
5:20 pm-11:30 pm
1 stop7h 10m
$236
SeattleGrand Junction
SEA - GJT
SEAGJT
Seattle/Tacoma Intl
Wed 4/8
3:48 pm-10:17 pm
1 stop5h 29m
Grand Junction Regnl
Wed 4/15
6:10 pm-10:56 pm
1 stop5h 46m
$251
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-MTJ
SEA-COS
SEA-GJT
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-MTJ
SEA-COS
SEA-GJT
What is the cheapest month to book a flight from Seattle to Colorado?
Currently, January is the cheapest month in which you can book a flight from Seattle to Colorado (average of $37). Flying from Seattle to Colorado in July is currently the most expensive (average of $100). 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 March 17, 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 March 14, 2026.
Travelers seeking maximum savings on their Seattle to Colorado flight should consider departing on Wednesday 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 March 17, 2026.
The most flights from SEA to USCO are scheduled on a Monday (35 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (11 on average).
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 March 17, 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.
Comfort
8.0
Boarding
8.1
Entertainment
7.5
Overall
8.0
Crew
8.6
Food
7.0
Reviews
1 / 20
10.0
ExcellentAnonymous,Mar 2026
KOA - HNL
Comfort
8.0
Boarding
8.1
Entertainment
7.5
Overall
8.0
Crew
8.6
Food
7.0
Reviews
1 / 20
10.0
ExcellentAnonymous,Mar 2026
KOA - HNL
Comfort
8.0
Boarding
8.1
Entertainment
7.5
Overall
8.0
Crew
8.6
Food
7.0
Reviews
1 / 20
10.0
ExcellentAnonymous,Mar 2026
KOA - HNL
Comfort
8.0
Boarding
8.1
Entertainment
7.5
Overall
8.0
Crew
8.6
Food
7.0
Reviews
1 / 20
10.0
ExcellentAnonymous,Mar 2026
KOA - HNL
Comfort
8.0
Boarding
8.1
Entertainment
7.5
Overall
8.0
Crew
8.6
Food
7.0
Reviews
1 / 20
10.0
ExcellentAnonymous,Mar 2026
KOA - HNL
Comfort
8.0
Boarding
8.1
Entertainment
7.5
Overall
8.0
Crew
8.6
Food
7.0
Reviews
1 / 20
10.0
ExcellentAnonymous,Mar 2026
KOA - HNL
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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Complete your trip
Complete your trip to Colorado by adding a car rental and/or hotel reservation to your travel itinerary.
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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 March 17, 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 March 17, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$57 | Average$164 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$78 | Average$216 | FlexibilityNo cancel fee | On-time85% | |
| Cheapest$97 | Average$263 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$118 | Average$392 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$118 | Average$349 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$130 | Average$452 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$216 | Average$412 | FlexibilityNo cancel fee | On-time71% |