$109+ Cheap flights from Seattle (SEA) to Fort Collins, CO
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 8/18. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — DEN
Aug 24 — Aug 311
Round-trip
1 adult, Economy
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Find cheap flights from Seattle to Fort Collins 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
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheapflights Tip: The best prices from Seattle/Tacoma Intl to Fort Collins are usually found in January or October, booked 74 days in advance, depart on a Friday or Thursday and return on a Friday
Cheap flight deals from Seattle to Fort Collins
Cheapest
Best
Last-minute
One-way
Cheapest flights from Seattle to Fort CollinsExplore the most affordable flight options available from Seattle to Fort Collins. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 25, 2026.
Explore the most affordable flight options available from Seattle to Fort Collins. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 25, 2026.
This Kiwi.com deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/148:53 pm
SEA
- DEN
1 stop11h 12m
Frontier
Wed 8/197:15 am
DEN
- SEA
Nonstop3h 04m
Frontier
Deal found 7/24![Frontier logo]()
$144
This Kiwi.com deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/219:29 pm
SEA
- DEN
1 stop10h 36m
Frontier
Sun 8/237:15 am
DEN
- SEA
Nonstop3h 04m
Frontier
Deal found 7/24![Frontier logo]()
$145
This Kiwi.com deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/217:06 pm
SEA
- DEN
Nonstop2h 52m
Frontier
Wed 8/268:45 am
DEN
- SEA
1 stop11h 53m
Frontier
Deal found 7/24![Frontier logo]()
$146
This Kiwi.com deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/158:15 pm
SEA
- DEN
1 stop12h 17m
Frontier
Tue 9/221:07 pm
DEN
- SEA
Nonstop3h 01m
Frontier
Deal found 7/24![Frontier logo]()
$147
This Kiwi.com deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/257:06 pm
SEA
- DEN
Nonstop2h 52m
Frontier
Sat 8/298:45 am
DEN
- SEA
1 stop11h 53m
Frontier
Deal found 7/24![Frontier logo]()
$148
This WAYA deal was found by Cheapflights users on 7/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure WAYA is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/28:53 pm
SEA
- DEN
1 stop5h 55m
Frontier
Wed 9/910:29 pm
DEN
- SEA
Nonstop2h 58m
Frontier
Deal found 7/22![Frontier logo]()
$151
This Cheapflightsfares deal was found by Cheapflights users on 7/22. Clicking the “Pick Dates” 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 8/117:06 pm
SEA
- DEN
Nonstop2h 52m
Frontier
Thu 8/1311:00 am
DEN
- SEA
Nonstop3h 17m
Frontier
Deal found 7/22![Frontier logo]()
$152
This Super.com deal was found by Cheapflights users on 7/22. Clicking the “Pick Dates” 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 9/307:00 am
SEA
- DEN
Nonstop2h 51m
Frontier
Sun 10/47:45 am
DEN
- SEA
Nonstop3h 06m
Frontier
Deal found 7/22![Frontier logo]()
$153
This Frontier deal was found by Cheapflights users on 7/22. Clicking the “Pick Dates” 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 8/267:06 pm
SEA
- DEN
Nonstop2h 52m
Frontier
Mon 8/317:15 am
DEN
- SEA
Nonstop3h 04m
Frontier
Deal found 7/22![Frontier logo]()
$154
This Kiwi.com deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/18:48 pm
SEA
- DEN
1 stop11h 17m
Frontier
Tue 9/87:15 am
DEN
- SEA
Nonstop3h 04m
Frontier
Deal found 7/24![Frontier logo]()
$155
This Cheapflightsfares deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/52:37 pm
SEA
- DEN
Nonstop2h 56m
Frontier
Sun 9/67:15 am
DEN
- SEA
Nonstop3h 04m
Frontier
Deal found 7/24![Frontier logo]()
$156
This Cheapflightsfares deal was found by Cheapflights users on 7/21. Clicking the “Pick Dates” 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 8/147:06 pm
SEA
- DEN
Nonstop2h 52m
Frontier
Sat 8/227:15 am
DEN
- SEA
Nonstop3h 04m
Frontier
Deal found 7/21![Frontier logo]()
$157
Best flights from Seattle to Fort CollinsDiscover carefully curated flight deals from Seattle to Fort Collins that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 25, 2026.
Discover carefully curated flight deals from Seattle to Fort Collins that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 25, 2026.
This Delta deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/272:50 pm
SEA
- DEN
1 stop8h 02m
Delta
Sat 8/296:28 pm
DEN
- SEA
1 stop4h 37m
Delta
Deal found 7/24![Delta logo]()
$227
This Southwest deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/295:00 am
SEA
- DEN
1 stop6h 10m
Southwest
Sat 8/294:10 pm
DEN
- SEA
1 stop7h 45m
Southwest
Deal found 7/24![Southwest logo]()
$242
This Alaska Airlines deal was found by Cheapflights users on 7/20. Clicking the “Pick Dates” 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 9/262:18 pm
SEA
- DEN
1 stop5h 55m
Alaska Airlines
Tue 9/291:43 pm
DEN
- SEA
1 stop7h 09m
Alaska Airlines
Deal found 7/20![Alaska Airlines logo]()
$257
This Delta deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/252:50 pm
SEA
- DEN
1 stop8h 02m
Delta
Sat 8/291:44 pm
DEN
- SEA
1 stop7h 46m
Delta
Deal found 7/24![Delta logo]()
$227
This Southwest deal was found by Cheapflights users on 7/21. Clicking the “Pick Dates” 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 9/195:30 am
SEA
- DEN
1 stop6h 55m
Southwest
Sat 9/2611:40 am
DEN
- SEA
2 stops10h 15m
Southwest
Deal found 7/21![Southwest logo]()
$262
This Alaska Airlines deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/2511:41 am
SEA
- DEN
1 stop6h 45m
Alaska Airlines
Sat 8/298:08 am
DEN
- SEA
1 stop6h 37m
Alaska Airlines
Deal found 7/24![Alaska Airlines logo]()
$287
This Southwest deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/189:25 am
SEA
- DEN
1 stop6h 30m
Southwest
Sat 8/221:35 pm
DEN
- SEA
2 stops7h 55m
Southwest
Deal found 7/24![Southwest logo]()
$272
This Alaska Airlines deal was found by Cheapflights users on 7/20. Clicking the “Pick Dates” 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 9/510:18 am
SEA
- DEN
1 stop8h 08m
Alaska Airlines
Sun 9/61:43 pm
DEN
- SEA
1 stop6h 09m
Alaska Airlines
Deal found 7/20![Alaska Airlines logo]()
$293
This Southwest deal was found by Cheapflights users on 7/22. Clicking the “Pick Dates” 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 8/229:20 am
SEA
- DEN
2 stops9h 15m
Southwest
Wed 8/262:40 pm
DEN
- SEA
2 stops7h 35m
Southwest
Deal found 7/22![Southwest logo]()
$278
This Southwest deal was found by Cheapflights users on 7/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/28:05 am
SEA
- DEN
1 stop6h 05m
Southwest
Tue 10/68:50 am
DEN
- SEA
2 stops7h 05m
Southwest
Deal found 7/21![Southwest logo]()
$284
This Southwest deal was found by Cheapflights users on 7/20. Clicking the “Pick Dates” 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 8/295:30 am
SEA
- DEN
2 stops7h 55m
Southwest
Sun 8/306:20 am
DEN
- SEA
1 stop6h 45m
Southwest
Deal found 7/20![Southwest logo]()
$288
Last-minute flights from Seattle to Fort CollinsDiscover last-minute flight deals from Seattle to Fort Collins. Data last updated July 25, 2026 and is based on user searches.
Discover last-minute flight deals from Seattle to Fort Collins. Data last updated July 25, 2026 and is based on user searches.
This Frontier deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/87:06 pm
SEA
- DEN
Nonstop2h 52m
Frontier
Sun 8/167:00 am
DEN
- SEA
Nonstop3h 04m
Frontier
Deal found 7/24![Frontier logo]()
$162
This Cheapflightsfares deal was found by Cheapflights users on 7/22. Clicking the “Pick Dates” 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 8/117:06 pm
SEA
- DEN
Nonstop2h 52m
Frontier
Thu 8/1311:00 am
DEN
- SEA
Nonstop3h 17m
Frontier
Deal found 7/22![Frontier logo]()
$152
This Cheapflightsfares deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/117:06 pm
SEA
- DEN
Nonstop2h 52m
Frontier
Fri 8/147:00 am
DEN
- SEA
Nonstop3h 04m
Frontier
Deal found 7/24![Frontier logo]()
$161
This Frontier deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/147:06 pm
SEA
- DEN
Nonstop2h 52m
Frontier
Sun 8/167:00 am
DEN
- SEA
Nonstop3h 04m
Frontier
Deal found 7/24![Frontier logo]()
$144
This Cheapflightsfares deal was found by Cheapflights users on 7/21. Clicking the “Pick Dates” 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 8/147:06 pm
SEA
- DEN
Nonstop2h 52m
Frontier
Sat 8/227:15 am
DEN
- SEA
Nonstop3h 04m
Frontier
Deal found 7/21![Frontier logo]()
$157
This Kiwi.com deal was found by Cheapflights users on 7/21. Clicking the “Pick Dates” 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 8/192:37 pm
SEA
- DEN
Nonstop2h 56m
Frontier
Tue 8/2510:49 pm
DEN
- SEA
1 stop12h 50m
Frontier
Deal found 7/21![Frontier logo]()
$159
This Kiwi.com deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/219:29 pm
SEA
- DEN
1 stop10h 36m
Frontier
Sun 8/237:15 am
DEN
- SEA
Nonstop3h 04m
Frontier
Deal found 7/24![Frontier logo]()
$145
This Kiwi.com deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/217:06 pm
SEA
- DEN
Nonstop2h 52m
Frontier
Wed 8/268:45 am
DEN
- SEA
1 stop11h 53m
Frontier
Deal found 7/24![Frontier logo]()
$146
This Kiwi.com deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/2410:34 am
SEA
- DEN
1 stop13h 10m
Frontier
Wed 8/267:15 am
DEN
- SEA
Nonstop3h 04m
Frontier
Deal found 7/24![Frontier logo]()
$158
This Kiwi.com deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/257:06 pm
SEA
- DEN
Nonstop2h 52m
Frontier
Sat 8/298:45 am
DEN
- SEA
1 stop11h 53m
Frontier
Deal found 7/24![Frontier logo]()
$148
This Frontier deal was found by Cheapflights users on 7/22. Clicking the “Pick Dates” 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 8/267:06 pm
SEA
- DEN
Nonstop2h 52m
Frontier
Mon 8/317:15 am
DEN
- SEA
Nonstop3h 04m
Frontier
Deal found 7/22![Frontier logo]()
$154
This Cheapflightsfares deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/297:06 pm
SEA
- DEN
Nonstop2h 52m
Frontier
Sat 9/511:05 am
DEN
- SEA
Nonstop3h 17m
Frontier
Deal found 7/24![Frontier logo]()
$160
One-way flights from Seattle to Fort CollinsSearch for one-way flight options from Seattle to Fort Collins. Find affordable one-way fares based on user searches. Data last updated July 25, 2026.
Search for one-way flight options from Seattle to Fort Collins. Find affordable one-way fares based on user searches. Data last updated July 25, 2026.
This Delta deal was found by Cheapflights users on 7/23. Clicking the “Pick Dates” 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 8/189:59 am
SEA
- DEN
1 stop7h 19m
Delta
Deal found 7/23![Delta logo]()
$109
This Kiwi.com deal was found by Cheapflights users on 7/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/2711:15 am
SEA
- DEN
1 stop21h 11m
Frontier
Deal found 7/23![Frontier logo]()
$110
This Kiwi.com deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/69:29 pm
SEA
- DEN
1 stop29h 19m
Frontier
Deal found 7/24![Frontier logo]()
$111
This Kiwi.com deal was found by Cheapflights users on 7/22. Clicking the “Pick Dates” 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 9/169:16 pm
SEA
- DEN
2 stops16h 21m
Frontier
Deal found 7/22![Frontier logo]()
$113
This Kiwi.com deal was found by Cheapflights users on 7/21. Clicking the “Pick Dates” 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 11/511:06 am
SEA
- DEN
1 stop12h 19m
Frontier
Deal found 7/21![Frontier logo]()
$114
This Kiwi.com deal was found by Cheapflights users on 7/22. Clicking the “Pick Dates” 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 9/18:53 pm
SEA
- DEN
2 stops19h 17m
Frontier
Deal found 7/22![Frontier logo]()
$115
This Cheapflightsfares deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/17:41 pm
SEA
- DEN
Nonstop2h 53m
Frontier
Deal found 7/24![Frontier logo]()
$116
This Kiwi.com deal was found by Cheapflights users on 7/22. Clicking the “Pick Dates” 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 10/211:06 am
SEA
- DEN
1 stop21h 34m
Frontier
Deal found 7/22![Frontier logo]()
$117
This Super.com deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com 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
Deal found 7/25![Frontier logo]()
$118
This Kiwi.com deal was found by Cheapflights users on 7/22. Clicking the “Pick Dates” 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 11/39:16 pm
SEA
- DEN
1 stop5h 36m
Frontier
Deal found 7/22![Frontier logo]()
$119
Find flight deals from Seattle to Fort Collins
Keep the following information in mind while searching for Seattle to Fort Collins flight deals. Data was last updated July 25, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $144 (Frontier) |
One-way from | $109 (Delta) |
Popular in | June |
Cheapest in | January |
Average price | $300 |
Cheapflights Fare Finder
Customize your flight search to find flights from Seattle to Fort Collins that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 25, 2026.
Use the filters below to find and compare flights from Seattle to Fort Collins that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
Quickest round-trip
SeattleDenver
SEA - DEN
SEADEN
Seattle/Tacoma Intl
Thu 8/27
2:50 pm-11:52 pm
1 stop8h 02m
Denver Intl
Sat 8/29
6:28 pm-10:05 pm
1 stop4h 37m
$227
SeattleDenver
SEA - DEN
SEADEN
Seattle/Tacoma Intl
Tue 8/25
2:50 pm-11:52 pm
1 stop8h 02m
Denver Intl
Sat 8/29
1:44 pm-8:30 pm
1 stop7h 46m
$227
SeattleDenver
SEA - DEN
SEADEN
Seattle/Tacoma Intl
Sat 8/29
5:00 am-12:10 pm
1 stop6h 10m
Denver Intl
Sat 8/29
4:10 pm-10:55 pm
1 stop7h 45m
$242
SeattleDenver
SEA - DEN
SEADEN
Seattle/Tacoma Intl
Sat 9/26
2:18 pm-9:13 pm
1 stop5h 55m
Denver Intl
Tue 9/29
1:43 pm-7:52 pm
1 stop7h 09m
$257
SeattleDenver
SEA - DEN
SEADEN
Seattle/Tacoma Intl
Sat 9/19
5:30 am-1:25 pm
1 stop6h 55m
Denver Intl
Sat 9/26
11:40 am-8:55 pm
2 stops10h 15m
$262
SeattleDenver
SEA - DEN
SEADEN
Seattle/Tacoma Intl
Tue 8/18
9:25 am-4:55 pm
1 stop6h 30m
Denver Intl
Sat 8/22
1:35 pm-8:30 pm
2 stops7h 55m
$272
SeattleDenver
SEA - DEN
SEADEN
Seattle/Tacoma Intl
Sat 8/22
9:20 am-7:35 pm
2 stops9h 15m
Denver Intl
Wed 8/26
2:40 pm-9:15 pm
2 stops7h 35m
$278
SeattleDenver
SEA - DEN
SEADEN
Seattle/Tacoma Intl
Fri 10/2
8:05 am-3:10 pm
1 stop6h 05m
Denver Intl
Tue 10/6
8:50 am-2:55 pm
2 stops7h 05m
$284
SeattleDenver
SEA - DEN
SEADEN
Seattle/Tacoma Intl
Tue 8/25
11:41 am-7:26 pm
1 stop6h 45m
Denver Intl
Sat 8/29
8:08 am-1:45 pm
1 stop6h 37m
$287
SeattleDenver
SEA - DEN
SEADEN
Seattle/Tacoma Intl
Sat 8/29
5:30 am-2:25 pm
2 stops7h 55m
Denver Intl
Sun 8/30
6:20 am-12:05 pm
1 stop6h 45m
$288
Showing 1-10 of 22 resultsSorted by cheapest first
Best time to book a flight from Seattle to Fort Collins
Have a flexible travel schedule? Discover the best time to fly to Fort Collins from Seattle with our price prediction graph.
SEA-DEN
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from Seattle to Fort Collins
SEA-FC9
SEA-DEN
What is the cheapest time of day to fly from SEA to FC9?
Find hourly flight availability from Seattle to Fort Collins. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated July 25, 2026.
It’s typically best to fly out from Seattle to Fort Collins in the evening. Doing so could potentially save you 27% on the flight price compared to flying in the morning, which is usually more expensive.
Weekly flight availability from Seattle to Fort Collins
Explore weekly flight availability from Seattle to Fort Collins. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated July 25, 2026.
The most flights from SEA to FC9 are scheduled on a Friday (48 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 Fort Collins?
Airfare is below average for this route at the moment.
Seattle to Fort Collins flights typically cost between $194 and $352 in August.The cheapest round-trip price found within the last 5 days was $144 on Frontier (Aug 14-Aug 16).
What is the cheapest day to fly from Seattle to Fort Collins?
Use this chart to determine the cheapest time to fly round-trip from Seattle to Fort Collins. Price data was last updated on July 18, 2026.
Travelers seeking maximum savings on their Seattle to Fort Collins flight should consider departing on Saturday 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.
Reviews of airlines servicing Fort Collins
Get insights into the airlines that provide service to Fort Collins. 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 Fort Collins. Reviews last updated July 25, 2026.
Read through reviews of airlines operating flights from Seattle to Fort Collins, such as Southwest,Alaska Airlines, andDelta. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Overall
8.0
Comfort
8.0
Crew
8.6
Boarding
8.1
Entertainment
7.5
Food
7.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Overall
8.0
Comfort
8.0
Crew
8.6
Boarding
8.1
Entertainment
7.5
Food
7.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Overall
8.0
Comfort
8.0
Crew
8.6
Boarding
8.1
Entertainment
7.5
Food
7.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Overall
8.0
Comfort
8.0
Crew
8.6
Boarding
8.1
Entertainment
7.5
Food
7.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Overall
8.0
Comfort
8.0
Crew
8.6
Boarding
8.1
Entertainment
7.5
Food
7.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Overall
8.0
Comfort
8.0
Crew
8.6
Boarding
8.1
Entertainment
7.5
Food
7.0
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 Fort Collins. 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 Fort Collins
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Complete your trip
Complete your trip to Fort Collins by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Seattle to Fort Collins by cabin class
Find flights from Seattle to Fort Collins, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Seattle and Fort Collins flights
Browse other Seattle and Fort Collins flight options. Last updated on July 25, 2026.
Other flights from Seattle
Browse through other flights departing from Seattle. Flights are based on user searches made on Cheapflights and were last updated on July 25, 2026.
Popular flight searches
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Seattle to Fort Collins flights
Consider these flights traveling from Seattle to Fort Collins.
Top 7 airlines flying from Seattle to Fort Collins
Discover the top 7 airlines that operate flights from Seattle to Fort Collins. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 25, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$55 | Average$181 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$69 | Average$211 | FlexibilityNo cancel fee | On-time85% | |
| Cheapest$89 | Average$255 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$117 | Average$285 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$117 | Average$306 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$131 | Average$319 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$200 | Average$328 | FlexibilityNo cancel fee | On-time62% |