$63+ 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 5/22. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — DEN
May 10 — May 171
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 September, booked 66 days in advance, depart on a Friday or Saturday 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 April 10, 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 April 10, 2026.
This Kiwi.com deal was found by Cheapflights users on 4/6. 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.
Thu 5/77:50 pm
SEA
- DEN
Nonstop3h 04m
Frontier
Wed 5/137:50 am
DEN
- SEA
Nonstop2h 59m
Frontier
Deal found 4/6![Frontier logo]()
$97
This Cheapflightsfares deal was found by Cheapflights users on 4/6. 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.
Wed 4/297:12 pm
SEA
- DEN
Nonstop2h 47m
Frontier
Mon 5/47:15 am
DEN
- SEA
Nonstop3h 12m
Frontier
Deal found 4/6![Frontier logo]()
$98
This Booking.com deal was found by Cheapflights users on 4/5. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/27:12 pm
SEA
- DEN
Nonstop2h 47m
Frontier
Sun 5/37:15 am
DEN
- SEA
Nonstop3h 12m
Frontier
Deal found 4/5![Frontier logo]()
$99
This Cheapflightsfares deal was found by Cheapflights users on 4/6. 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.
Wed 4/227:12 pm
SEA
- DEN
Nonstop2h 47m
Frontier
Sun 4/2612:51 pm
DEN
- SEA
Nonstop3h 14m
Frontier
Deal found 4/6![Frontier logo]()
$102
This Frontier deal was found by Cheapflights users on 4/9. 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.
Thu 6/43:19 pm
SEA
- DEN
Nonstop2h 59m
Frontier
Sun 6/712:00 pm
DEN
- SEA
Nonstop3h 01m
Frontier
Deal found 4/9![Frontier logo]()
$103
This Cheapflightsfares deal was found by Cheapflights users on 4/6. 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 5/14:20 pm
SEA
- DEN
Nonstop2h 51m
Frontier
Sun 5/37:15 am
DEN
- SEA
Nonstop3h 12m
Frontier
Deal found 4/6![Frontier logo]()
$107
This Frontier deal was found by Cheapflights users on 4/8. 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.
Fri 5/17:12 pm
SEA
- DEN
Nonstop2h 47m
Frontier
Mon 5/47:15 am
DEN
- SEA
Nonstop3h 12m
Frontier
Deal found 4/8![Frontier logo]()
$108
This Kiwi.com deal was found by Cheapflights users on 4/8. 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.
Wed 4/2910:57 am
SEA
- DEN
1 stop7h 52m
Frontier
Tue 5/57:50 am
DEN
- SEA
Nonstop2h 59m
Frontier
Deal found 4/8![Frontier logo]()
$113
This Kiwi.com deal was found by Cheapflights users on 4/8. 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.
Wed 4/2910:57 am
SEA
- DEN
1 stop21h 48m
Frontier
Wed 5/137:50 am
DEN
- SEA
Nonstop2h 59m
Frontier
Deal found 4/8![Frontier logo]()
$118
This Cheapflightsfares deal was found by Cheapflights users on 4/7. 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.
Tue 5/57:50 pm
SEA
- DEN
Nonstop3h 04m
Frontier
Wed 5/67:01 pm
DEN
- SEA
1 stop16h 21m
Frontier
Deal found 4/7![Frontier logo]()
$123
This Kiwi.com deal was found by Cheapflights users on 4/8. 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.
Wed 4/2910:57 am
SEA
- DEN
1 stop7h 52m
Frontier
Fri 5/17:40 am
DEN
- SEA
Nonstop3h 12m
Frontier
Deal found 4/8![Frontier logo]()
$124
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 April 10, 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 April 10, 2026.
This Delta deal was found by Cheapflights users on 4/5. 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.
Sat 5/161:40 pm
SEA
- DEN
Nonstop3h 00m
Delta
Wed 5/201:08 pm
DEN
- SEA
Nonstop3h 02m
Delta
Deal found 4/5![Delta logo]()
$217
This United Airlines deal was found by Cheapflights users on 4/7. 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.
Fri 5/17:05 pm
SEA
- DEN
Nonstop2h 51m
United Airlines
Mon 5/48:58 pm
DEN
- SEA
Nonstop3h 01m
United Airlines
Deal found 4/7![United Airlines logo]()
$237
This Southwest deal was found by Cheapflights users on 4/5. 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.
Wed 5/611:40 am
SEA
- DEN
2 stops8h 00m
Southwest
Mon 5/114:25 pm
DEN
- SEA
2 stops7h 40m
Southwest
Deal found 4/5![Southwest logo]()
$257
This Southwest deal was found by Cheapflights users on 4/6. 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.
Tue 4/216:50 am
SEA
- DEN
2 stops7h 15m
Southwest
Tue 5/122:50 pm
DEN
- SEA
2 stops7h 10m
Southwest
Deal found 4/6![Southwest logo]()
$293
This United Airlines deal was found by Cheapflights users on 4/7. 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 5/25:25 pm
SEA
- DEN
1 stop6h 34m
United Airlines
Wed 5/65:20 am
DEN
- SEA
1 stop8h 05m
United Airlines
Deal found 4/7![United Airlines logo]()
$327
This Southwest deal was found by Cheapflights users on 4/6. 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 5/137:50 am
SEA
- DEN
2 stops8h 20m
Southwest
Fri 5/153:20 pm
DEN
- SEA
2 stops8h 45m
Southwest
Deal found 4/6![Southwest logo]()
$302
This Delta deal was found by Cheapflights users on 4/5. 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.
Tue 6/305:30 am
SEA
- DEN
1 stop5h 21m
Delta
Sat 7/45:40 am
DEN
- SEA
1 stop4h 25m
Delta
Deal found 4/5![Delta logo]()
$335
This Delta deal was found by Cheapflights users on 4/9. 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.
Fri 9/187:40 pm
SEA
- DEN
Nonstop2h 50m
Delta
Mon 9/216:45 am
DEN
- SEA
Nonstop3h 08m
Delta
Deal found 4/9![Delta logo]()
$336
This Southwest deal was found by Cheapflights users on 4/5. 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 4/237:20 am
SEA
- DEN
1 stop6h 20m
Southwest
Tue 4/281:45 pm
DEN
- SEA
2 stops10h 10m
Southwest
Deal found 4/5![Southwest logo]()
$312
This Southwest deal was found by Cheapflights users on 4/7. 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 9/56:00 am
SEA
- DEN
1 stop4h 40m
Southwest
Wed 9/912:50 pm
DEN
- SEA
2 stops8h 25m
Southwest
Deal found 4/7![Southwest logo]()
$320
This Southwest deal was found by Cheapflights users on 4/8. 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.
Fri 5/152:50 pm
SEA
- DEN
1 stop7h 55m
Southwest
Mon 5/184:25 pm
DEN
- SEA
2 stops7h 40m
Southwest
Deal found 4/8![Southwest logo]()
$327
This Southwest deal was found by Cheapflights users on 4/6. 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.
Fri 4/249:40 am
SEA
- DEN
2 stops7h 25m
Southwest
Mon 4/276:25 pm
DEN
- SEA
1 stop7h 30m
Southwest
Deal found 4/6![Southwest logo]()
$342
Last-minute flights from Seattle to Fort CollinsDiscover last-minute flight deals from Seattle to Fort Collins. Data last updated April 10, 2026 and is based on user searches.
Discover last-minute flight deals from Seattle to Fort Collins. Data last updated April 10, 2026 and is based on user searches.
This Cheapflightsfares deal was found by Cheapflights users on 4/6. 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.
Wed 4/227:12 pm
SEA
- DEN
Nonstop2h 47m
Frontier
Sun 4/2612:51 pm
DEN
- SEA
Nonstop3h 14m
Frontier
Deal found 4/6![Frontier logo]()
$102
This Cheapflightsfares deal was found by Cheapflights users on 4/6. 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.
Wed 4/297:12 pm
SEA
- DEN
Nonstop2h 47m
Frontier
Mon 5/47:15 am
DEN
- SEA
Nonstop3h 12m
Frontier
Deal found 4/6![Frontier logo]()
$98
This Kiwi.com deal was found by Cheapflights users on 4/8. 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.
Wed 4/2910:57 am
SEA
- DEN
1 stop7h 52m
Frontier
Tue 5/57:50 am
DEN
- SEA
Nonstop2h 59m
Frontier
Deal found 4/8![Frontier logo]()
$113
This Kiwi.com deal was found by Cheapflights users on 4/8. 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.
Wed 4/2910:57 am
SEA
- DEN
1 stop21h 48m
Frontier
Wed 5/137:50 am
DEN
- SEA
Nonstop2h 59m
Frontier
Deal found 4/8![Frontier logo]()
$118
This Kiwi.com deal was found by Cheapflights users on 4/8. 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.
Wed 4/2910:57 am
SEA
- DEN
1 stop7h 52m
Frontier
Fri 5/17:40 am
DEN
- SEA
Nonstop3h 12m
Frontier
Deal found 4/8![Frontier logo]()
$124
This Cheapflightsfares deal was found by Cheapflights users on 4/6. 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 5/14:20 pm
SEA
- DEN
Nonstop2h 51m
Frontier
Mon 5/47:15 am
DEN
- SEA
Nonstop3h 12m
Frontier
Deal found 4/6![Frontier logo]()
$107
This Booking.com deal was found by Cheapflights users on 4/5. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/27:12 pm
SEA
- DEN
Nonstop2h 47m
Frontier
Sun 5/37:15 am
DEN
- SEA
Nonstop3h 12m
Frontier
Deal found 4/5![Frontier logo]()
$99
This Frontier deal was found by Cheapflights users on 4/9. 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.
Sat 5/27:12 pm
SEA
- DEN
Nonstop2h 47m
Frontier
Mon 5/410:29 pm
DEN
- SEA
1 stop21h 06m
Frontier
Deal found 4/9![Frontier logo]()
$125
This Cheapflightsfares deal was found by Cheapflights users on 4/7. 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.
Tue 5/57:50 pm
SEA
- DEN
Nonstop3h 04m
Frontier
Wed 5/67:01 pm
DEN
- SEA
1 stop16h 21m
Frontier
Deal found 4/7![Frontier logo]()
$123
This Kiwi.com deal was found by Cheapflights users on 4/6. 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.
Thu 5/77:50 pm
SEA
- DEN
Nonstop3h 04m
Frontier
Wed 5/137:50 am
DEN
- SEA
Nonstop2h 59m
Frontier
Deal found 4/6![Frontier logo]()
$97
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 April 10, 2026.
Search for one-way flight options from Seattle to Fort Collins. Find affordable one-way fares based on user searches. Data last updated April 10, 2026.
This Super.com deal was found by Cheapflights users on 4/8. 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.
Fri 5/223:19 pm
SEA
- DEN
Nonstop2h 59m
Frontier
Deal found 4/8![Frontier logo]()
$63
This Kiwi.com deal was found by Cheapflights users on 4/7. 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 5/2611:21 am
SEA
- DEN
1 stop21h 43m
Frontier
Deal found 4/7![Frontier logo]()
$64
This Kiwi.com deal was found by Cheapflights users on 4/6. 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.
Mon 4/2710:11 pm
SEA
- DEN
1 stop12h 19m
Frontier
Deal found 4/6![Frontier logo]()
$65
This Kiwi.com deal was found by Cheapflights users on 4/7. 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.
Wed 4/2910:57 am
SEA
- DEN
1 stop21h 48m
Frontier
Deal found 4/7![Frontier logo]()
$70
This deal was found by Cheapflights users on 4/9. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/307:41 pm
SEA
- DEN
Nonstop2h 55m
Frontier
Deal found 4/9![Frontier logo]()
$72
This Kiwi.com deal was found by Cheapflights users on 4/6. 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 6/211:21 am
SEA
- DEN
1 stop7h 45m
Frontier
Deal found 4/6![Frontier logo]()
$78
This Super.com deal was found by Cheapflights users on 4/6. 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.
Thu 4/3010:57 am
SEA
- DEN
1 stop6h 19m
Frontier
Deal found 4/6![Frontier logo]()
$79
This Cheapflightsfares deal was found by Cheapflights users on 4/9. 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.
Fri 5/111:07 am
SEA
- DEN
1 stop6h 09m
Frontier
Deal found 4/9![Frontier logo]()
$80
This Kiwi.com deal was found by Cheapflights users on 4/7. 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 6/167:41 pm
SEA
- DEN
Nonstop2h 55m
Frontier
Deal found 4/7![Frontier logo]()
$82
This Cheapflightsfares deal was found by Cheapflights users on 4/5. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/103:19 pm
SEA
- DEN
Nonstop2h 48m
Frontier
Deal found 4/5![Frontier logo]()
$83
This Frontier deal was found by Cheapflights users on 4/8. 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.
Fri 6/57:50 pm
SEA
- DEN
Nonstop3h 04m
Frontier
Deal found 4/8![Frontier logo]()
$84
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 April 10, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $97 (Kiwi.com) |
One-way from | $63 (Super.com) |
Popular in | June |
Cheapest in | January |
Average price | $228 |
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 April 10, 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
SeattleDenver
SEA - DEN
SEADEN
Seattle/Tacoma Intl
Sat 5/16
1:40 pm-5:40 pm
Nonstop3h 00m
Denver Intl
Wed 5/20
1:08 pm-3:10 pm
Nonstop3h 02m
$217
Quickest round-trip
SeattleDenver
SEA - DEN
SEADEN
Seattle/Tacoma Intl
Fri 5/1
7:05 pm-10:56 pm
Nonstop2h 51m
Denver Intl
Mon 5/4
8:58 pm-10:59 pm
Nonstop3h 01m
$237
SeattleDenver
SEA - DEN
SEADEN
Seattle/Tacoma Intl
Wed 5/6
11:40 am-8:40 pm
2 stops8h 00m
Denver Intl
Mon 5/11
4:25 pm-11:05 pm
2 stops7h 40m
$257
SeattleDenver
SEA - DEN
SEADEN
Seattle/Tacoma Intl
Tue 4/21
6:50 am-3:05 pm
2 stops7h 15m
Denver Intl
Tue 5/12
2:50 pm-9:00 pm
2 stops7h 10m
$293
SeattleDenver
SEA - DEN
SEADEN
Seattle/Tacoma Intl
Wed 5/13
7:50 am-5:10 pm
2 stops8h 20m
Denver Intl
Fri 5/15
3:20 pm-11:05 pm
2 stops8h 45m
$302
SeattleDenver
SEA - DEN
SEADEN
Seattle/Tacoma Intl
Thu 4/23
7:20 am-2:40 pm
1 stop6h 20m
Denver Intl
Tue 4/28
1:45 pm-10:55 pm
2 stops10h 10m
$312
SeattleDenver
SEA - DEN
SEADEN
Seattle/Tacoma Intl
Sat 9/5
6:00 am-11:40 am
1 stop4h 40m
Denver Intl
Wed 9/9
12:50 pm-8:15 pm
2 stops8h 25m
$320
SeattleDenver
SEA - DEN
SEADEN
Seattle/Tacoma Intl
Sat 5/2
5:25 pm-12:59 am
1 stop6h 34m
Denver Intl
Wed 5/6
5:20 am-12:25 pm
1 stop8h 05m
$327
SeattleDenver
SEA - DEN
SEADEN
Seattle/Tacoma Intl
Fri 5/15
2:50 pm-11:45 pm
1 stop7h 55m
Denver Intl
Mon 5/18
4:25 pm-11:05 pm
2 stops7h 40m
$327
SeattleDenver
SEA - DEN
SEADEN
Seattle/Tacoma Intl
Tue 6/30
5:30 am-11:51 am
1 stop5h 21m
Denver Intl
Sat 7/4
5:40 am-9:05 am
1 stop4h 25m
$335
Showing 1-10 of 24 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
How far ahead should I book a flight from Seattle to Fort Collins?
Use this chart to determine the optimal time to book a round-trip flight from Seattle to Fort Collins. Price data was last updated on April 3, 2026.
The best time to book flights from Seattle to Fort Collins is 66 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.
What is the cheapest month to book a flight from Seattle to Fort Collins?
Currently, January is the cheapest month in which you can book a flight from Seattle to Fort Collins (average of $37). Flying from Seattle to Fort Collins in June is currently the most expensive (average of $113). 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 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 April 10, 2026.
It’s typically best to fly out from Seattle to Fort Collins in the evening. Doing so could potentially save you 23% on the flight price compared to flying in the morning, which is usually more expensive.
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 April 4, 2026.
Travelers seeking maximum savings on their Seattle to Fort Collins flight should consider departing on Friday evenings when fares are most often at their lowest. Sunday mornings flights should be avoided if possible as fares are typically the most expensive at this time.
Weekly flight availability from Seattle to 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 April 10, 2026.
The most flights from SEA to FC9 are scheduled on a Thursday (34 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (7 on average).
How much does it cost to fly round-trip from Seattle to Fort Collins?
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 April 10, 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
Entertainment
7.5
Food
7.0
Crew
8.6
Boarding
8.1
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Overall
8.0
Comfort
8.0
Entertainment
7.5
Food
7.0
Crew
8.6
Boarding
8.1
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Overall
8.0
Comfort
8.0
Entertainment
7.5
Food
7.0
Crew
8.6
Boarding
8.1
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Overall
8.0
Comfort
8.0
Entertainment
7.5
Food
7.0
Crew
8.6
Boarding
8.1
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Overall
8.0
Comfort
8.0
Entertainment
7.5
Food
7.0
Crew
8.6
Boarding
8.1
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Overall
8.0
Comfort
8.0
Entertainment
7.5
Food
7.0
Crew
8.6
Boarding
8.1
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Related info for your journey
Find useful and relevant information for your journey from Seattle to 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
See prices for flight routes from nearby airports that may be better suited for you.
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 April 10, 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 April 10, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Seattle to Fort Collins flights
Consider these flights traveling from Seattle to Fort Collins.
Top 6 airlines flying from Seattle to Fort Collins
Discover the top 6 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 April 10, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$56 | Average$167 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$78 | Average$223 | FlexibilityNo cancel fee | On-time85% | |
| Cheapest$94 | Average$232 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$117 | Average$286 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$118 | Average$250 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$130 | Average$439 | FlexibilityNo cancel fee | On-time69% |