$74+ Cheap flights from Seattle (SEA) to Colorado
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 11/2. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — DEN
Oct 10 — Oct 171
Round-trip
1 adult, Economy
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Find cheap flights from Seattle to Colorado with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
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Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Seattle to Colorado
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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 September 10, 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 September 10, 2026.
This Kiwi.com deal was found by Cheapflights users on 9/8. 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.
Mon 11/24:27 pm -
Nonstop2h 48m
Sat 11/71:04 pm -
Nonstop3h 08m
Deal found 9/8![Frontier logo]()
$134
This Justfly.com deal was found by Cheapflights users on 9/8. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/58:09 pm -
1 stop12h 36m
Mon 11/91:04 pm -
Nonstop3h 08m
Deal found 9/8![Frontier logo]()
$135
This Super.com deal was found by Cheapflights users on 9/8. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/44:27 pm -
Nonstop2h 54m
Tue 10/61:07 pm -
Nonstop3h 01m
Deal found 9/8![Frontier logo]()
$136
This Expedia deal was found by Cheapflights users on 9/9. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/164:27 pm -
Nonstop2h 50m
Fri 10/2312:00 pm -
Nonstop2h 59m
Deal found 9/9![Multiple Airlines logo]()
$137
This Cheapflightsfares deal was found by Cheapflights users on 9/8. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/164:27 pm -
Nonstop2h 50m
Mon 10/191:07 pm -
Nonstop3h 05m
Deal found 9/8![Frontier logo]()
$138
This Kiwi.com deal was found by Cheapflights users on 9/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/44:27 pm -
Nonstop2h 48m
Wed 11/111:10 pm -
1 stop6h 44m
Deal found 9/6![Frontier logo]()
$139
This Kiwi.com deal was found by Cheapflights users on 9/6. Clicking the “Pick Dates” 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 11/64:27 pm -
Nonstop2h 48m
Sat 11/141:04 pm -
Nonstop3h 08m
Deal found 9/6![Frontier logo]()
$140
This Kiwi.com deal was found by Cheapflights users on 9/7. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/264:27 pm -
Nonstop2h 54m
Wed 9/301:07 pm -
Nonstop3h 01m
Deal found 9/7![Frontier logo]()
$141
This Kiwi.com deal was found by Cheapflights users on 9/7. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/276:54 pm -
Nonstop2h 43m
Mon 11/21:04 pm -
Nonstop3h 08m
Deal found 9/7![Multiple Airlines logo]()
$142
This Expedia deal was found by Cheapflights users on 9/7. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/194:27 pm -
Nonstop2h 50m
Tue 10/2010:55 pm -
1 stop20h 50m
Deal found 9/7![Frontier logo]()
$143
This Cheapflightsfares deal was found by Cheapflights users on 9/6. Clicking the “Pick Dates” 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 10/314:27 pm -
Nonstop2h 48m
Mon 11/96:42 pm -
1 stop17h 17m
Deal found 9/6![Frontier logo]()
$144
This Cheapflightsfares deal was found by Cheapflights users on 9/6. Clicking the “Pick Dates” 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 10/239:16 pm -
1 stop14h 25m
Mon 10/261:07 pm -
Nonstop3h 05m
Deal found 9/6![Frontier logo]()
$145
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 September 10, 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 September 10, 2026.
This Delta deal was found by Cheapflights users on 9/10. 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.
Tue 11/39:05 am -
Nonstop2h 44m
Tue 11/101:14 pm -
Nonstop3h 11m
Deal found 9/10![Delta logo]()
$157
This Southwest deal was found by Cheapflights users on 9/7. 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.
Sat 10/2411:40 am -
2 stops10h 00m
Mon 10/268:05 pm -
1 stop6h 35m
Deal found 9/7![Southwest logo]()
$227
This United Airlines deal was found by Cheapflights users on 9/5. Clicking the “Pick Dates” 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 11/103:49 pm -
1 stop4h 33m
Wed 11/115:10 pm -
1 stop5h 09m
Deal found 9/5![United Airlines logo]()
$297
This Delta deal was found by Cheapflights users on 9/6. Clicking the “Pick Dates” 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 11/58:00 pm -
Nonstop2h 55m
Tue 11/101:14 pm -
Nonstop3h 11m
Deal found 9/6![Delta logo]()
$157
This Delta deal was found by Cheapflights users on 9/8. 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 10/138:00 pm -
Nonstop2h 55m
Thu 10/156:00 am -
Nonstop3h 10m
Deal found 9/8![Delta logo]()
$157
This Delta deal was found by Cheapflights users on 9/6. Clicking the “Pick Dates” 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 11/611:50 pm -
1 stop9h 12m
Sun 11/86:00 am -
Nonstop3h 10m
Deal found 9/6![Delta logo]()
$167
This Delta deal was found by Cheapflights users on 9/6. Clicking the “Pick Dates” 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 11/107:59 pm -
Nonstop2h 48m
Sat 11/146:15 am -
1 stop7h 25m
Deal found 9/6![Delta logo]()
$167
This Delta deal was found by Cheapflights users on 9/6. Clicking the “Pick Dates” 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 11/58:00 pm -
Nonstop2h 55m
Mon 11/96:10 pm -
1 stop6h 49m
Deal found 9/6![Delta logo]()
$167
This Southwest deal was found by Cheapflights users on 9/10. 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 10/207:30 am -
2 stops8h 30m
Sat 10/2412:30 pm -
2 stops10h 10m
Deal found 9/10![Southwest logo]()
$252
This Delta deal was found by Cheapflights users on 9/6. Clicking the “Pick Dates” 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 10/98:00 pm -
Nonstop2h 55m
Tue 10/137:05 am -
1 stop6h 35m
Deal found 9/6![Delta logo]()
$167
This Delta deal was found by Cheapflights users on 9/5. Clicking the “Pick Dates” 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 10/1911:50 pm -
1 stop9h 12m
Thu 10/226:00 pm -
1 stop6h 59m
Deal found 9/5![Delta logo]()
$177
This Southwest deal was found by Cheapflights users on 9/5. Clicking the “Pick Dates” 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 11/175:40 am -
1 stop6h 20m
Wed 11/187:50 am -
1 stop6h 10m
Deal found 9/5![Southwest logo]()
$287
This United Airlines deal was found by Cheapflights users on 9/9. 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.
Wed 11/118:30 am -
1 stop7h 37m
Sat 11/147:00 am -
1 stop7h 55m
Deal found 9/9![United Airlines logo]()
$318
This United Airlines deal was found by Cheapflights users on 9/10. 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.
Thu 10/112:43 pm -
1 stop6h 38m
Tue 10/271:27 pm -
1 stop5h 30m
Deal found 9/10![United Airlines logo]()
$321
This United Airlines deal was found by Cheapflights users on 9/8. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/265:00 am -
1 stop6h 41m
Tue 9/297:05 am -
1 stop5h 41m
Deal found 9/8![United Airlines logo]()
$331
This United Airlines deal was found by Cheapflights users on 9/10. 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.
Thu 10/16:30 am -
2 stops12h 51m
Wed 10/281:27 pm -
2 stops8h 20m
Deal found 9/10![United Airlines logo]()
$331
This Southwest deal was found by Cheapflights users on 9/5. Clicking the “Pick Dates” 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 10/295:30 am -
2 stops9h 55m
Sun 11/18:35 pm -
1 stop5h 40m
Deal found 9/5![Southwest logo]()
$384
This United Airlines deal was found by Cheapflights users on 9/6. Clicking the “Pick Dates” 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 10/162:27 pm -
1 stop6h 48m
Mon 10/196:00 pm -
1 stop5h 59m
Deal found 9/6![United Airlines logo]()
$338
This Southwest deal was found by Cheapflights users on 9/7. 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.
Sat 9/2611:25 am -
1 stop7h 45m
Mon 10/58:55 pm -
1 stop5h 45m
Deal found 9/7![Southwest logo]()
$389
This United Airlines deal was found by Cheapflights users on 9/10. 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.
Sat 10/109:05 am -
2 stops10h 24m
Sat 10/177:05 am -
2 stops12h 39m
Deal found 9/10![United Airlines logo]()
$339
This United Airlines deal was found by Cheapflights users on 9/5. Clicking the “Pick Dates” 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 12/25:05 am -
1 stop6h 17m
Sat 12/51:29 pm -
2 stops9h 19m
Deal found 9/5![United Airlines logo]()
$344
This Delta deal was found by Cheapflights users on 9/8. 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 10/237:15 am -
1 stop4h 15m
Tue 10/271:15 pm -
1 stop6h 47m
Deal found 9/8![Delta logo]()
$339
This United Airlines deal was found by Cheapflights users on 9/7. 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.
Thu 1/216:29 am -
2 stops12h 40m
Mon 1/252:05 pm -
2 stops7h 43m
Deal found 9/7![United Airlines logo]()
$349
This Delta deal was found by Cheapflights users on 9/8. 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 10/1012:30 pm -
2 stops8h 52m
Tue 10/208:17 am -
2 stops9h 28m
Deal found 9/8![Delta logo]()
$352
This United Airlines deal was found by Cheapflights users on 9/10. 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.
Mon 11/235:05 am -
1 stop6h 16m
Fri 11/275:10 pm -
1 stop5h 09m
Deal found 9/10![United Airlines logo]()
$357
This United Airlines deal was found by Cheapflights users on 9/5. Clicking the “Pick Dates” 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 10/13:55 pm -
1 stop5h 11m
Fri 10/25:08 pm -
1 stop6h 51m
Deal found 9/5![United Airlines logo]()
$359
This United Airlines deal was found by Cheapflights users on 9/9. 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.
Fri 10/26:05 pm -
1 stop4h 54m
Sun 10/45:30 am -
1 stop5h 31m
Deal found 9/9![United Airlines logo]()
$360
This United Airlines deal was found by Cheapflights users on 9/8. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/232:27 pm -
1 stop5h 11m
Sun 10/255:00 am -
1 stop5h 47m
Deal found 9/8![United Airlines logo]()
$385
This United Airlines deal was found by Cheapflights users on 9/7. 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.
Tue 10/135:00 am -
1 stop6h 33m
Mon 10/195:15 am -
1 stop5h 46m
Deal found 9/7![United Airlines logo]()
$391
This United Airlines deal was found by Cheapflights users on 9/8. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/28:30 am -
1 stop5h 06m
Wed 2/33:20 pm -
1 stop6h 52m
Deal found 9/8![United Airlines logo]()
$405
Last-minute flights from Seattle to ColoradoDiscover last-minute flight deals from Seattle to Colorado. Data last updated September 10, 2026 and is based on user searches.
Discover last-minute flight deals from Seattle to Colorado. Data last updated September 10, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 9/7. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/264:27 pm -
Nonstop2h 54m
Wed 9/301:07 pm -
Nonstop3h 01m
Deal found 9/7![Frontier logo]()
$141
This Mytrip deal was found by Cheapflights users on 9/10. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/34:27 pm -
Nonstop2h 54m
Sat 10/1010:45 pm -
1 stop11h 13m
Deal found 9/10![Frontier logo]()
$140
This Super.com deal was found by Cheapflights users on 9/8. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/44:27 pm -
Nonstop2h 54m
Tue 10/61:07 pm -
Nonstop3h 01m
Deal found 9/8![Frontier logo]()
$136
This Kiwi.com deal was found by Cheapflights users on 9/9. 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.
Wed 10/79:45 pm -
1 stop13h 15m
Sun 11/11:10 pm -
1 stop21h 35m
Deal found 9/9![Multiple Airlines logo]()
$285
This CheapOair deal was found by Cheapflights users on 9/9. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/104:27 pm -
Nonstop2h 50m
Sat 10/171:07 pm -
Nonstop3h 05m
Deal found 9/9![Frontier logo]()
$139
This Cheapflightsfares deal was found by Cheapflights users on 9/9. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/148:00 pm -
1 stop12h 30m
Sat 10/171:07 pm -
Nonstop3h 05m
Deal found 9/9![Frontier logo]()
$147
This Expedia deal was found by Cheapflights users on 9/9. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/164:27 pm -
Nonstop2h 50m
Fri 10/2312:00 pm -
Nonstop2h 59m
Deal found 9/9![Multiple Airlines logo]()
$137
This Cheapflightsfares deal was found by Cheapflights users on 9/8. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/164:27 pm -
Nonstop2h 50m
Mon 10/191:07 pm -
Nonstop3h 05m
Deal found 9/8![Frontier logo]()
$138
This Expedia deal was found by Cheapflights users on 9/7. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/194:27 pm -
Nonstop2h 50m
Tue 10/2010:55 pm -
1 stop20h 50m
Deal found 9/7![Frontier logo]()
$143
This Cheapflightsfares deal was found by Cheapflights users on 9/6. Clicking the “Pick Dates” 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 10/239:16 pm -
1 stop14h 25m
Mon 10/261:07 pm -
Nonstop3h 05m
Deal found 9/6![Frontier logo]()
$145
This Kiwi.com deal was found by Cheapflights users on 9/7. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/276:54 pm -
Nonstop2h 43m
Mon 11/21:04 pm -
Nonstop3h 08m
Deal found 9/7![Multiple Airlines logo]()
$142
This Cheapflightsfares deal was found by Cheapflights users on 9/6. Clicking the “Pick Dates” 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 10/314:27 pm -
Nonstop2h 48m
Mon 11/96:42 pm -
1 stop17h 17m
Deal found 9/6![Frontier logo]()
$144
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 September 10, 2026.
Search for one-way flight options from Seattle to Colorado. Find affordable one-way fares based on user searches. Data last updated September 10, 2026.
This Kiwi.com deal was found by Cheapflights users on 9/10. 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.
Mon 11/210:50 am -
1 stop21h 56m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/10![Frontier logo]()
$74
This Trip.com deal was found by Cheapflights users on 9/10. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/46:59 pm -
Nonstop2h 39m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/10![Alaska Airlines logo]()
$77
This United Airlines deal was found by Cheapflights users on 9/10. 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 10/75:00 am -
Nonstop2h 45m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/10![United Airlines logo]()
$79
This United Airlines deal was found by Cheapflights users on 9/6. Clicking the “Pick Dates” 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 12/225:00 am -
Nonstop2h 41m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/6![United Airlines logo]()
$80
This Super.com deal was found by Cheapflights users on 9/9. 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.
Mon 10/54:27 pm -
Nonstop2h 54m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/9![Frontier logo]()
$81
This Kiwi.com deal was found by Cheapflights users on 9/6. Clicking the “Pick Dates” 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 10/138:00 pm -
1 stop18h 14m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/6![Frontier logo]()
$83
This United Airlines deal was found by Cheapflights users on 9/10. 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 10/2812:20 pm -
1 stop8h 07m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/10![United Airlines logo]()
$84
This Super.com deal was found by Cheapflights users on 9/8. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/38:09 pm -
1 stop18h 02m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/8![Frontier logo]()
$85
This Cheapflightsfares deal was found by Cheapflights users on 9/10. 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.
Mon 10/2610:53 am -
1 stop21h 53m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/10![Frontier logo]()
$86
This Kiwi.com deal was found by Cheapflights users on 9/10. 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 9/307:25 pm -
1 stop21h 34m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/10![Frontier logo]()
$87
This Super.com deal was found by Cheapflights users on 9/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/214:37 pm -
Nonstop2h 48m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/5![Frontier logo]()
$88
This Southwest deal was found by Cheapflights users on 9/7. 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.
Tue 10/612:10 am -
1 stop8h 05m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/7![Southwest logo]()
$89
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 September 10, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $134 (Kiwi.com) |
One-way from | $74 (Kiwi.com) |
Popular in | June |
Cheapest in | January |
Average price | $272 |
Good round-trip deal | $296 or less |
Good one-way deal | $184 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 7,457,451 searches. Data last updated September 10, 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 Seattle/Tacoma Intl - DEN Denver Intl
SEADEN
Seattle/Tacoma Intl
Tue 12/15
4:40 pm-8:30 pm
Nonstop2h 50m
Denver Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$79
SeattleDenver
SEA Seattle/Tacoma Intl - DEN Denver Intl
SEADEN
Seattle/Tacoma Intl
Mon 10/12
6:05 pm-9:49 pm
Nonstop2h 44m
Denver Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$79
SeattleDenver
SEA Seattle/Tacoma Intl - DEN Denver Intl
SEADEN
Seattle/Tacoma Intl
Thu 11/5
8:00 pm-11:55 pm
Nonstop2h 55m
Denver Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$79
SeattleDenver
SEA Seattle/Tacoma Intl - DEN Denver Intl
SEADEN
Seattle/Tacoma Intl
Mon 11/23
8:30 am-12:17 pm
Nonstop2h 47m
Denver Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$79
SeattleDenver
SEA Seattle/Tacoma Intl - DEN Denver Intl
SEADEN
Seattle/Tacoma Intl
Sun 10/4
8:55 am-12:45 pm
Nonstop2h 50m
Denver Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$79
SeattleDenver
SEA Seattle/Tacoma Intl - DEN Denver Intl
SEADEN
Seattle/Tacoma Intl
Mon 11/2
8:00 pm-11:55 pm
Nonstop2h 55m
Denver Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$79
SeattleDenver
SEA Seattle/Tacoma Intl - DEN Denver Intl
SEADEN
Seattle/Tacoma Intl
Mon 10/26
12:20 pm-9:27 pm
1 stop8h 07m
Denver Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$84
SeattleDenver
SEA Seattle/Tacoma Intl - DEN Denver Intl
SEADEN
Seattle/Tacoma Intl
Fri 10/30
12:20 pm-9:27 pm
1 stop8h 07m
Denver Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$84
SeattleDenver
SEA Seattle/Tacoma Intl - DEN Denver Intl
SEADEN
Seattle/Tacoma Intl
Tue 10/6
12:10 am-9:15 am
1 stop8h 05m
Denver Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$89
SeattleDenver
SEA Seattle/Tacoma Intl - DEN Denver Intl
SEADEN
Seattle/Tacoma Intl
Sat 10/3
4:15 pm-10:45 pm
1 stop5h 30m
Denver Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$89
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-DRO
SEA-HDN
SEA-GUC
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-DRO
SEA-HDN
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 $195). Flying from Seattle to Colorado in June is currently the most expensive (average of $348). 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 September 10, 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 30% on your trip compared to booking a flight in the morning.
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 September 10, 2026.
The most flights from SEA to USCO are scheduled on a Wednesday (37 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (8 on average).
How much does it cost to fly round-trip from Seattle to Colorado?
Airfare is below average for this route at the moment.
Seattle to Colorado flights typically cost between $175 and $343 in November.The cheapest round-trip price found within the last 5 days was $134 on Frontier (Nov 2-Nov 7).
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 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 September 5, 2026.
Travelers seeking maximum savings on their Seattle to Colorado flight should consider departing on Saturday at noon when fares are most often at their lowest. Thursday mornings 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 September 10, 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.
Crew
8.6
Boarding
8.1
Comfort
8.0
Food
7.0
Entertainment
7.5
Overall
8.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Crew
8.6
Boarding
8.1
Comfort
8.0
Food
7.0
Entertainment
7.5
Overall
8.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Crew
8.6
Boarding
8.1
Comfort
8.0
Food
7.0
Entertainment
7.5
Overall
8.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Crew
8.6
Boarding
8.1
Comfort
8.0
Food
7.0
Entertainment
7.5
Overall
8.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Crew
8.6
Boarding
8.1
Comfort
8.0
Food
7.0
Entertainment
7.5
Overall
8.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Crew
8.6
Boarding
8.1
Comfort
8.0
Food
7.0
Entertainment
7.5
Overall
8.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
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
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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 September 10, 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 8 airlines flying from Seattle to Colorado
Discover the top 8 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 7,457,451 searches. Data last updated September 10, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$55 | Average$193 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$97 | Average$293 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$114 | Average$418 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$118 | Average$373 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$138 | Average$456 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$148 | Average$250 | FlexibilityNo cancel fee | On-time85% | |
| Cheapest$200 | Average$328 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$274 | Average$518 | FlexibilityNo cancel fee | On-time71% |