$103+ 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 8/19. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — DEN
Jul 12 — Jul 191
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 June 12, 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 June 12, 2026.
This Kiwi.com deal was found by Cheapflights users on 6/10. 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.
Thu 7/2312:35 pm
SEA
- DEN
Nonstop3h 05m
Frontier
Tue 8/47:13 am
DEN
- SEA
Nonstop3h 04m
Frontier
Deal found 6/10![Frontier logo]()
$173
This Kiwi.com deal was found by Cheapflights users on 6/10. 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.
Fri 7/247:06 pm
SEA
- DEN
Nonstop2h 52m
Frontier
Tue 8/47:13 am
DEN
- SEA
Nonstop3h 04m
Frontier
Deal found 6/10![Frontier logo]()
$174
This Cheapflightsfares deal was found by Cheapflights users on 6/8. 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.
Thu 8/132:22 pm
SEA
- DEN
Nonstop2h 56m
Frontier
Tue 8/1812:00 pm
DEN
- SEA
Nonstop3h 04m
Frontier
Deal found 6/8![Frontier logo]()
$175
This Cheapflightsfares deal was found by Cheapflights users on 6/10. 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.
Wed 8/57:06 pm
SEA
- DEN
Nonstop2h 52m
Frontier
Wed 8/1211:00 am
DEN
- SEA
Nonstop3h 17m
Frontier
Deal found 6/10![Frontier logo]()
$176
This Frontier deal was found by Cheapflights users on 6/8. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/17:06 pm
SEA
- DEN
Nonstop2h 52m
Frontier
Tue 8/117:00 am
DEN
- SEA
Nonstop3h 04m
Frontier
Deal found 6/8![Frontier logo]()
$177
This Frontier deal was found by Cheapflights users on 6/10. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/87:06 pm
SEA
- DEN
Nonstop2h 52m
Frontier
Sun 8/307:45 am
DEN
- SEA
Nonstop3h 03m
Frontier
Deal found 6/10![Frontier logo]()
$178
This Cheapflightsfares deal was found by Cheapflights users on 6/7. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/197:41 pm
SEA
- DEN
Nonstop2h 55m
Frontier
Mon 8/247:45 am
DEN
- SEA
Nonstop3h 03m
Frontier
Deal found 6/7![Frontier logo]()
$180
This Cheapflightsfares deal was found by Cheapflights users on 6/10. 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.
Fri 7/247:06 pm
SEA
- DEN
Nonstop2h 52m
Frontier
Mon 8/107:00 am
DEN
- SEA
Nonstop3h 04m
Frontier
Deal found 6/10![Frontier logo]()
$181
This Frontier deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/213:19 pm
SEA
- DEN
Nonstop2h 48m
Frontier
Sun 8/237:45 am
DEN
- SEA
Nonstop3h 03m
Frontier
Deal found 6/9![Frontier logo]()
$183
This Frontier deal was found by Cheapflights users on 6/10. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/67:06 pm
SEA
- DEN
Nonstop2h 52m
Frontier
Wed 8/268:44 am
DEN
- SEA
1 stop11h 14m
Frontier
Deal found 6/10![Frontier logo]()
$184
This Cheapflightsfares deal was found by Cheapflights users on 6/10. 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.
Sat 8/17:06 pm
SEA
- DEN
Nonstop2h 52m
Frontier
Wed 8/57:00 am
DEN
- SEA
Nonstop3h 04m
Frontier
Deal found 6/10![Frontier logo]()
$185
This Southwest deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/2712:40 pm
SEA
- COS
1 stop5h 45m
Southwest
Tue 11/37:00 am
COS
- SEA
1 stop4h 55m
Southwest
Deal found 6/11![Southwest logo]()
$215
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 June 12, 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 June 12, 2026.
This Southwest deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/126:25 am
SEA
- DEN
1 stop5h 35m
Southwest
Tue 8/182:40 pm
DEN
- SEA
2 stops7h 35m
Southwest
Deal found 6/10![Southwest logo]()
$221
This United Airlines deal was found by Cheapflights users on 6/11. 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.
Sat 7/115:00 am
SEA
- GJT
1 stop6h 31m
United Airlines
Sat 7/189:28 am
GJT
- SEA
2 stops11h 10m
United Airlines
Deal found 6/11![United Airlines logo]()
$324
This Delta deal was found by Cheapflights users on 6/7. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/87:15 am
SEA
- GJT
2 stops10h 02m
Delta
Thu 7/166:56 pm
GJT
- SEA
1 stop6h 03m
Delta
Deal found 6/7![Delta logo]()
$340
This Alaska Airlines deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/111:59 am
SEA
- DEN
2 stops8h 14m
Alaska Airlines
Sat 9/512:05 pm
DEN
- SEA
1 stop7h 46m
Alaska Airlines
Deal found 6/10![Alaska Airlines logo]()
$355
This Southwest deal was found by Cheapflights users on 6/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/116:10 pm
SEA
- DEN
Nonstop2h 45m
Southwest
Fri 8/148:55 pm
DEN
- SEA
Nonstop3h 00m
Southwest
Deal found 6/8![Southwest logo]()
$256
This Southwest deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/79:10 am
SEA
- COS
1 stop6h 20m
Southwest
Tue 8/117:20 am
COS
- SEA
1 stop7h 00m
Southwest
Deal found 6/10![Southwest logo]()
$291
This American Airlines deal was found by Cheapflights users on 6/10. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/2311:22 pm
SEA
- EGE
1 stop9h 31m
American Airlines
Tue 7/287:50 am
EGE
- SEA
1 stop7h 41m
American Airlines
Deal found 6/10![American Airlines logo]()
$649
This Delta deal was found by Cheapflights users on 6/10. 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 7/1410:05 am
SEA
- DEN
1 stop7h 19m
Delta
Wed 7/2212:29 pm
DEN
- SEA
1 stop8h 58m
Delta
Deal found 6/10![Delta logo]()
$345
This Southwest deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/169:05 am
SEA
- DEN
2 stops7h 30m
Southwest
Wed 8/193:30 pm
DEN
- SEA
1 stop6h 30m
Southwest
Deal found 6/9![Southwest logo]()
$296
This United Airlines deal was found by Cheapflights users on 6/10. 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 8/297:00 am
SEA
- MTJ
2 stops7h 54m
United Airlines
Wed 9/23:24 pm
MTJ
- SEA
1 stop6h 51m
United Airlines
Deal found 6/10![United Airlines logo]()
$361
This Delta deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/1112:36 pm
SEA
- GJT
2 stops8h 20m
Delta
Sat 8/157:41 am
GJT
- SEA
2 stops8h 09m
Delta
Deal found 6/9![Delta logo]()
$359
This United Airlines deal was found by Cheapflights users on 6/11. 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.
Fri 7/103:40 pm
SEA
- ASE
1 stop4h 46m
United Airlines
Mon 7/136:12 pm
ASE
- SEA
1 stop5h 58m
United Airlines
Deal found 6/11![United Airlines logo]()
$368
This Southwest deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/317:30 am
SEA
- DEN
2 stops7h 35m
Southwest
Sat 8/84:10 pm
DEN
- SEA
1 stop7h 45m
Southwest
Deal found 6/9![Southwest logo]()
$317
This United Airlines deal was found by Cheapflights users on 6/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/115:07 am
SEA
- COS
1 stop7h 04m
United Airlines
Thu 11/125:13 pm
COS
- SEA
1 stop6h 46m
United Airlines
Deal found 6/7![United Airlines logo]()
$376
This Delta deal was found by Cheapflights users on 6/10. 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.
Thu 7/239:30 am
SEA
- GJT
2 stops11h 25m
Delta
Mon 7/276:56 pm
GJT
- SEA
1 stop6h 03m
Delta
Deal found 6/10![Delta logo]()
$389
This Southwest deal was found by Cheapflights users on 6/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/35:20 pm
SEA
- COS
1 stop7h 00m
Southwest
Fri 2/266:40 am
COS
- SEA
2 stops8h 20m
Southwest
Deal found 6/7![Southwest logo]()
$324
This United Airlines deal was found by Cheapflights users on 6/6. 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 8/142:34 pm
SEA
- DRO
1 stop6h 26m
United Airlines
Sat 8/227:00 am
DRO
- SEA
2 stops9h 29m
United Airlines
Deal found 6/6![United Airlines logo]()
$393
This Southwest deal was found by Cheapflights users on 6/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/279:10 am
SEA
- DEN
1 stop7h 05m
Southwest
Sun 8/308:35 am
DEN
- SEA
2 stops7h 25m
Southwest
Deal found 6/8![Southwest logo]()
$332
This Delta deal was found by Cheapflights users on 6/7. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/69:40 pm
SEA
- GJT
2 stops23h 15m
Delta
Thu 7/166:56 pm
GJT
- SEA
1 stop4h 04m
Delta
Deal found 6/7![Delta logo]()
$434
This Southwest deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/209:10 am
SEA
- HDN
2 stops9h 05m
Southwest
Tue 8/258:45 am
HDN
- SEA
2 stops13h 15m
Southwest
Deal found 6/9![Southwest logo]()
$334
This United Airlines deal was found by Cheapflights users on 6/11. 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.
Fri 8/75:00 am
SEA
- GJT
1 stop6h 31m
United Airlines
Tue 8/111:40 pm
GJT
- SEA
1 stop5h 02m
United Airlines
Deal found 6/11![United Airlines logo]()
$415
This American Airlines deal was found by Cheapflights users on 6/9. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/1812:49 am
SEA
- GUC
1 stop10h 14m
American Airlines
Fri 6/2612:45 pm
GUC
- SEA
1 stop7h 30m
American Airlines
Deal found 6/9![American Airlines logo]()
$662
This Delta deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/71:25 pm
SEA
- GJT
1 stop3h 53m
Delta
Sun 8/96:53 pm
GJT
- SEA
1 stop6h 06m
Delta
Deal found 6/11![Delta logo]()
$455
This Southwest deal was found by Cheapflights users on 6/6. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/196:25 am
SEA
- DEN
1 stop5h 35m
Southwest
Mon 8/249:00 am
DEN
- SEA
2 stops7h 50m
Southwest
Deal found 6/6![Southwest logo]()
$350
This United Airlines deal was found by Cheapflights users on 6/7. 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.
Sat 8/229:00 am
SEA
- GJT
2 stops11h 59m
United Airlines
Mon 8/241:40 pm
GJT
- SEA
2 stops9h 11m
United Airlines
Deal found 6/7![United Airlines logo]()
$425
This Southwest deal was found by Cheapflights users on 6/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/147:30 am
SEA
- DEN
2 stops7h 20m
Southwest
Mon 7/208:35 pm
DEN
- SEA
1 stop5h 20m
Southwest
Deal found 6/8![Southwest logo]()
$350
This United Airlines deal was found by Cheapflights users on 6/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/195:00 am
SEA
- GUC
1 stop6h 41m
United Airlines
Tue 8/257:00 am
GUC
- SEA
2 stops9h 39m
United Airlines
Deal found 6/7![United Airlines logo]()
$432
This Southwest deal was found by Cheapflights users on 6/7. 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.
Wed 9/912:40 pm
SEA
- DEN
2 stops7h 40m
Southwest
Sun 9/134:15 pm
DEN
- SEA
1 stop6h 00m
Southwest
Deal found 6/7![Southwest logo]()
$351
This United Airlines deal was found by Cheapflights users on 6/9. 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 8/262:34 pm
SEA
- GJT
1 stop5h 01m
United Airlines
Sat 8/291:40 pm
GJT
- SEA
1 stop5h 02m
United Airlines
Deal found 6/9![United Airlines logo]()
$460
This Southwest deal was found by Cheapflights users on 6/7. 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 8/13:55 pm
SEA
- DEN
1 stop7h 55m
Southwest
Sun 8/27:50 am
DEN
- SEA
2 stops8h 05m
Southwest
Deal found 6/7![Southwest logo]()
$351
Last-minute flights from Seattle to ColoradoDiscover last-minute flight deals from Seattle to Colorado. Data last updated June 12, 2026 and is based on user searches.
Discover last-minute flight deals from Seattle to Colorado. Data last updated June 12, 2026 and is based on user searches.
This Super.com deal was found by Cheapflights users on 6/8. 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.
Wed 7/812:35 pm
SEA
- DEN
Nonstop3h 05m
Frontier
Sat 7/117:13 am
DEN
- SEA
Nonstop3h 04m
Frontier
Deal found 6/8![Frontier logo]()
$192
This Delta deal was found by Cheapflights users on 6/7. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/81:30 pm
SEA
- GJT
1 stop3h 47m
Delta
Mon 7/136:56 pm
GJT
- SEA
1 stop6h 03m
Delta
Deal found 6/7![Delta logo]()
$271
This Delta deal was found by Cheapflights users on 6/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/812:35 pm
SEA
- GJT
2 stops8h 20m
Delta
Wed 7/156:56 pm
GJT
- SEA
1 stop6h 03m
Delta
Deal found 6/8![Delta logo]()
$276
This Frontier deal was found by Cheapflights users on 6/10. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/157:06 pm
SEA
- DEN
Nonstop2h 52m
Frontier
Wed 7/227:13 am
DEN
- SEA
Nonstop3h 04m
Frontier
Deal found 6/10![Frontier logo]()
$196
This Cheapflightsfares deal was found by Cheapflights users on 6/10. 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.
Tue 7/217:06 pm
SEA
- DEN
Nonstop2h 52m
Frontier
Sat 7/257:13 am
DEN
- SEA
Nonstop3h 04m
Frontier
Deal found 6/10![Frontier logo]()
$194
This Kiwi.com deal was found by Cheapflights users on 6/10. 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.
Thu 7/2312:35 pm
SEA
- DEN
Nonstop3h 05m
Frontier
Tue 8/47:13 am
DEN
- SEA
Nonstop3h 04m
Frontier
Deal found 6/10![Frontier logo]()
$173
This Kiwi.com deal was found by Cheapflights users on 6/10. 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.
Fri 7/247:06 pm
SEA
- DEN
Nonstop2h 52m
Frontier
Tue 8/47:13 am
DEN
- SEA
Nonstop3h 04m
Frontier
Deal found 6/10![Frontier logo]()
$174
This Cheapflightsfares deal was found by Cheapflights users on 6/10. 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.
Fri 7/247:06 pm
SEA
- DEN
Nonstop2h 52m
Frontier
Mon 8/107:00 am
DEN
- SEA
Nonstop3h 04m
Frontier
Deal found 6/10![Frontier logo]()
$181
This Kiwi.com deal was found by Cheapflights users on 6/10. 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.
Tue 7/288:13 pm
SEA
- DEN
1 stop6h 35m
Frontier
Tue 8/47:13 am
DEN
- SEA
Nonstop3h 04m
Frontier
Deal found 6/10![Frontier logo]()
$190
This Cheapflightsfares deal was found by Cheapflights users on 6/10. 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.
Wed 7/297:06 pm
SEA
- DEN
Nonstop2h 52m
Frontier
Wed 8/57:00 am
DEN
- SEA
Nonstop3h 04m
Frontier
Deal found 6/10![Frontier logo]()
$185
This Cheapflightsfares deal was found by Cheapflights users on 6/8. 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.
Thu 7/307:06 pm
SEA
- DEN
Nonstop2h 52m
Frontier
Tue 8/47:13 am
DEN
- SEA
Nonstop3h 04m
Frontier
Deal found 6/8![Frontier logo]()
$184
This Cheapflightsfares deal was found by Cheapflights users on 6/8. 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.
Thu 7/307:06 pm
SEA
- DEN
Nonstop2h 52m
Frontier
Mon 8/39:13 am
DEN
- SEA
Nonstop3h 07m
Frontier
Deal found 6/8![Frontier logo]()
$200
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 June 12, 2026.
Search for one-way flight options from Seattle to Colorado. Find affordable one-way fares based on user searches. Data last updated June 12, 2026.
This Cheapflightsfares deal was found by Cheapflights users on 6/9. 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 8/198:13 pm
SEA
- DEN
1 stop6h 45m
Frontier
Deal found 6/9![Frontier logo]()
$103
This Frontier deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/58:13 pm
SEA
- DEN
1 stop6h 37m
Frontier
Deal found 6/11![Frontier logo]()
$105
This Frontier deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/268:13 pm
SEA
- DEN
1 stop6h 45m
Frontier
Deal found 6/11![Frontier logo]()
$106
This Southwest deal was found by Cheapflights users on 6/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/126:25 am
SEA
- DEN
1 stop5h 35m
Southwest
Deal found 6/8![Southwest logo]()
$108
This Cheapflightsfares deal was found by Cheapflights users on 6/9. 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.
Tue 8/410:34 am
SEA
- DEN
1 stop22h 29m
Frontier
Deal found 6/9![Frontier logo]()
$109
This Kiwi.com deal was found by Cheapflights users on 6/10. 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 8/248:13 pm
SEA
- DEN
1 stop6h 45m
Frontier
Deal found 6/10![Frontier logo]()
$110
This Gotogate deal was found by Cheapflights users on 6/11. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/128:13 pm
SEA
- DEN
1 stop6h 37m
Frontier
Deal found 6/11![Frontier logo]()
$111
This Kiwi.com deal was found by Cheapflights users on 6/10. 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 8/318:13 pm
SEA
- DEN
1 stop6h 45m
Frontier
Deal found 6/10![Frontier logo]()
$113
This Delta deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/2912:36 pm
SEA
- COS
2 stops9h 18m
Delta
Deal found 6/11![Delta logo]()
$113
This Super.com deal was found by Cheapflights users on 6/8. 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.
Thu 7/237:06 pm
SEA
- DEN
Nonstop2h 52m
Frontier
Deal found 6/8![Frontier logo]()
$114
This Super.com deal was found by Cheapflights users on 6/6. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/33:33 pm
SEA
- DEN
Nonstop2h 48m
Frontier
Deal found 6/6![Frontier logo]()
$115
This Cheapflightsfares deal was found by Cheapflights users on 6/9. 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.
Thu 7/167:06 pm
SEA
- DEN
Nonstop2h 52m
Frontier
Deal found 6/9![Frontier logo]()
$116
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 June 12, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $173 (Frontier) |
One-way from | $103 (Cheapflightsfares) |
Popular in | June |
Cheapest in | January |
Average price | $317 |
Good round-trip deal | $304 or less |
Good one-way deal | $165 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 June 12, 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 8/12
6:25 am-1:00 pm
1 stop5h 35m
Denver Intl
Tue 8/18
2:40 pm-9:15 pm
2 stops7h 35m
$221
Quickest round-trip
SeattleDenver
SEA - DEN
SEADEN
Seattle/Tacoma Intl
Tue 8/11
6:10 pm-9:55 pm
Nonstop2h 45m
Denver Intl
Fri 8/14
8:55 pm-10:55 pm
Nonstop3h 00m
$256
SeattleColorado Springs
SEA - COS
SEACOS
Seattle/Tacoma Intl
Fri 8/7
9:10 am-4:30 pm
1 stop6h 20m
Colorado Springs
Tue 8/11
7:20 am-1:20 pm
1 stop7h 00m
$291
SeattleDenver
SEA - DEN
SEADEN
Seattle/Tacoma Intl
Sun 8/16
9:05 am-5:35 pm
2 stops7h 30m
Denver Intl
Wed 8/19
3:30 pm-9:00 pm
1 stop6h 30m
$296
SeattleDenver
SEA - DEN
SEADEN
Seattle/Tacoma Intl
Fri 7/31
7:30 am-4:05 pm
2 stops7h 35m
Denver Intl
Sat 8/8
4:10 pm-10:55 pm
1 stop7h 45m
$317
SeattleGrand Junction
SEA - GJT
SEAGJT
Seattle/Tacoma Intl
Sat 7/11
5:00 am-12:31 pm
1 stop6h 31m
Grand Junction Regnl
Sat 7/18
9:28 am-7:38 pm
2 stops11h 10m
$324
SeattleColorado Springs
SEA - COS
SEACOS
Seattle/Tacoma Intl
Fri 7/3
5:20 pm-1:20 am
1 stop7h 00m
Colorado Springs
Fri 2/26
6:40 am-2:00 pm
2 stops8h 20m
$324
SeattleDenver
SEA - DEN
SEADEN
Seattle/Tacoma Intl
Thu 8/27
9:10 am-5:15 pm
1 stop7h 05m
Denver Intl
Sun 8/30
8:35 am-3:00 pm
2 stops7h 25m
$332
SeattleHayden
SEA - HDN
SEAHDN
Seattle/Tacoma Intl
Thu 8/20
9:10 am-7:15 pm
2 stops9h 05m
Hayden Yampa Valley
Tue 8/25
8:45 am-9:00 pm
2 stops13h 15m
$334
SeattleGrand Junction
SEA - GJT
SEAGJT
Seattle/Tacoma Intl
Wed 7/8
7:15 am-6:17 pm
2 stops10h 02m
Grand Junction Regnl
Thu 7/16
6:56 pm-11:59 pm
1 stop6h 03m
$340
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-GJT
SEA-HDN
SEA-ASE
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-GJT
SEA-HDN
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 $243). Flying from Seattle to Colorado in March is currently the most expensive (average of $423). 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 June 12, 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 46% 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 June 12, 2026.
The most flights from SEA to USCO are scheduled on a Friday (42 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (22 on average).
How much does it cost to fly round-trip from Seattle to Colorado?
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 June 8, 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. Sunday 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 June 12, 2026.
See what other customers who have flown with Alaska Airlines,Southwest, 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.
Boarding
8.1
Food
7.0
Entertainment
7.0
Overall
7.9
Crew
8.5
Comfort
7.8
Reviews
1 / 20
4.0
OkayAnonymous,Jun 2026
SEA - RNO
Boarding
8.1
Food
7.0
Entertainment
7.0
Overall
7.9
Crew
8.5
Comfort
7.8
Reviews
1 / 20
4.0
OkayAnonymous,Jun 2026
SEA - RNO
Boarding
8.1
Food
7.0
Entertainment
7.0
Overall
7.9
Crew
8.5
Comfort
7.8
Reviews
1 / 20
4.0
OkayAnonymous,Jun 2026
SEA - RNO
Boarding
8.1
Food
7.0
Entertainment
7.0
Overall
7.9
Crew
8.5
Comfort
7.8
Reviews
1 / 20
4.0
OkayAnonymous,Jun 2026
SEA - RNO
Boarding
8.1
Food
7.0
Entertainment
7.0
Overall
7.9
Crew
8.5
Comfort
7.8
Reviews
1 / 20
4.0
OkayAnonymous,Jun 2026
SEA - RNO
Boarding
8.1
Food
7.0
Entertainment
7.0
Overall
7.9
Crew
8.5
Comfort
7.8
Reviews
1 / 20
4.0
OkayAnonymous,Jun 2026
SEA - RNO
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
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to Colorado by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from 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 June 12, 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 2,558,603 searches. Data last updated June 12, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$56 | Average$175 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$69 | Average$209 | FlexibilityNo cancel fee | On-time85% | |
| Cheapest$91 | Average$279 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$117 | Average$385 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$117 | Average$355 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$130 | Average$456 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$200 | Average$328 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$228 | Average$446 | FlexibilityNo cancel fee | On-time71% |