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Fort Collins

$72+ 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 10/6. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — DEN
Oct 17 — Oct 241
Fri 10/17
Fri 10/24
1 adult, Economy
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Cheapflights Tip: The best prices from Seattle/Tacoma Intl to Fort Collins are usually found in October or November, booked 77 days in advance, depart on a Saturday or Friday and return on a Friday

Cheap 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 September 17, 2025.

Round-trip from

$96
(Frontier)

One-way from

$72
(Cheapflightsfares)

Popular in

December

Cheapest in

October

Average price

$189
From Seattle/Tacoma Intl to Fort Collins
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One-way flight from Seattle/Tacoma Intl to Fort Collins
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High demand for flights, 0% potential price rise
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Cheapest flight prices on average. 2% potential price decrease ($5 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find flight deals from Seattle to Fort Collins

Cheapest flights from Seattle to Fort Collins
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 September 17, 2025.

This Trip.com deal was found by Cheapflights users on 9/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/118:43 pmSEA - DEN
Nonstop2h 52mFrontier
Mon 10/135:30 amDEN - SEA
Nonstop3h 03mFrontier
Deal found 9/17$95
This Frontier deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/312:22 pmSEA - DEN
Nonstop2h 51mFrontier
Wed 11/510:00 amDEN - SEA
Nonstop3h 13mFrontier
Deal found 9/16$96
This Cheapflightsfares deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/312:22 pmSEA - DEN
Nonstop2h 51mFrontier
Mon 11/310:50 amDEN - SEA
Nonstop3h 13mFrontier
Deal found 9/16$98
This Cheapflightsfares deal was found by Cheapflights users on 9/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/178:43 pmSEA - DEN
Nonstop2h 52mFrontier
Thu 10/239:58 amDEN - SEA
Nonstop3h 09mFrontier
Deal found 9/17$99
This Cheapflightsfares deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/178:43 pmSEA - DEN
Nonstop2h 52mFrontier
Sun 10/195:30 amDEN - SEA
Nonstop3h 03mFrontier
Deal found 9/16$100
This Flightnetwork deal was found by Cheapflights users on 9/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/108:43 pmSEA - DEN
Nonstop2h 52mFrontier
Sun 10/125:30 amDEN - SEA
Nonstop3h 03mFrontier
Deal found 9/17$101
This Mytrip deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/228:43 pmSEA - DEN
Nonstop2h 52mFrontier
Mon 10/279:58 amDEN - SEA
Nonstop3h 09mFrontier
Deal found 9/16$102
This Cheapflightsfares deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/56:12 amSEA - DEN
Nonstop2h 56mFrontier
Tue 10/79:58 amDEN - SEA
Nonstop3h 09mFrontier
Deal found 9/15$103
This Priceline deal was found by Cheapflights users on 9/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/108:43 pmSEA - DEN
Nonstop2h 52mFrontier
Tue 10/149:58 amDEN - SEA
Nonstop3h 09mFrontier
Deal found 9/17$104
This Cheapflightsfares deal was found by Cheapflights users on 9/17. Clicking the “Pick Dates” 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 9/247:00 amSEA - DEN
Nonstop2h 53mFrontier
Fri 10/245:30 amDEN - SEA
Nonstop3h 03mFrontier
Deal found 9/17$105
This Cheapflightsfares deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/188:43 pmSEA - DEN
Nonstop2h 52mFrontier
Tue 10/219:58 amDEN - SEA
Nonstop3h 09mFrontier
Deal found 9/15$106
This Priceline deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/1112:58 pmSEA - DEN
Nonstop2h 59mFrontier
Mon 11/1710:00 amDEN - SEA
Nonstop3h 13mFrontier
Deal found 9/15$107

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 September 17, 2025.
Use the filters below to find and compare flights from Seattle to Fort Collins that are best for you.

Fly from

Seattle

Fly to

Fort Collins

Route

Depart

Return

Price

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Fri 10/31

7:30 pm-11:14 pm

Nonstop2h 44m

Denver Intl

Sun 11/2

5:25 am-7:31 am

Nonstop3h 06m

$133

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Wed 11/5

7:35 am-11:28 am

Nonstop2h 53m

Denver Intl

Wed 11/5

6:23 pm-11:59 pm

1 stop6h 36m

$143

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Sat 1/3

7:59 pm-11:47 pm

Nonstop2h 48m

Denver Intl

Sat 1/10

6:15 am-8:24 am

Nonstop3h 09m

$155

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Wed 12/3

7:35 pm-11:21 pm

Nonstop2h 46m

Denver Intl

Sat 12/6

7:45 pm-10:01 pm

Nonstop3h 16m

$157

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Sat 10/25

5:59 pm-9:46 pm

Nonstop2h 47m

Denver Intl

Tue 10/28

8:20 am-2:50 pm

1 stop7h 30m

$177

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Tue 3/3

7:40 pm-11:22 pm

Nonstop2h 42m

Denver Intl

Wed 3/4

6:15 am-8:24 am

Nonstop3h 09m

$177

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Thu 10/30

9:55 am-7:30 pm

2 stops8h 35m

Denver Intl

Sun 11/2

10:35 pm-12:35 am

Nonstop3h 00m

$178

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Wed 10/15

1:20 pm-9:20 pm

1 stop7h 00m

Denver Intl

Sun 10/19

10:40 pm-12:35 am

Nonstop2h 55m

$185

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Tue 3/3

9:55 am-6:33 pm

1 stop7h 38m

Denver Intl

Wed 3/4

7:00 am-9:00 am

Nonstop3h 00m

$187

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Wed 10/15

1:20 pm-11:50 pm

2 stops9h 30m

Denver Intl

Wed 10/22

3:30 pm-10:55 pm

1 stop8h 25m

$192

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/16

Showing 1-10 of 21 results
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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.
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

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 September 12, 2025.

The best time to book flights from Seattle to Fort Collins is 77 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, October is the cheapest month in which you can book a flight from Seattle to Fort Collins (average of $197). Flying from Seattle to Fort Collins in March is currently the most expensive (average of $278). 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 September 17, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Seattle to Fort Collins as you normally would.

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 December 16, 2024.

Travelers seeking maximum savings on their Seattle to Fort Collins flight should consider departing on Tuesday evenings when fares are most often at their lowest. Monday 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 September 17, 2025.

The most flights from SEA to FC9 are scheduled on a Wednesday (44 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (20 on average).

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 September 17, 2025.
Read through reviews of airlines operating flights from Seattle to Fort Collins, such as Alaska Airlines, Southwest, and Delta. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Food

7.1

Overall

8.0

Comfort

7.8

Crew

8.5

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Sep 2025

SEA - MKE

The crew were excellent, flight good, but the actual space for a person to occupy for 4 hours seems to get smaller and smaller 🤣. I am not overweight, and average height….very uncomfortable,, especially when I couldn’t recliner the seat at all, and the pocket in front doesn’t accommodate a water bottle.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Food

7.1

Overall

8.0

Comfort

7.8

Crew

8.5

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Sep 2025

SEA - MKE

The crew were excellent, flight good, but the actual space for a person to occupy for 4 hours seems to get smaller and smaller 🤣. I am not overweight, and average height….very uncomfortable,, especially when I couldn’t recliner the seat at all, and the pocket in front doesn’t accommodate a water bottle.
Southwest
8.0
Very good
4,242 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Food

7.1

Overall

8.0

Comfort

7.8

Crew

8.5

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Sep 2025

SEA - MKE

The crew were excellent, flight good, but the actual space for a person to occupy for 4 hours seems to get smaller and smaller 🤣. I am not overweight, and average height….very uncomfortable,, especially when I couldn’t recliner the seat at all, and the pocket in front doesn’t accommodate a water bottle.
Delta
8.0
Very good
7,961 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Food

7.1

Overall

8.0

Comfort

7.8

Crew

8.5

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Sep 2025

SEA - MKE

The crew were excellent, flight good, but the actual space for a person to occupy for 4 hours seems to get smaller and smaller 🤣. I am not overweight, and average height….very uncomfortable,, especially when I couldn’t recliner the seat at all, and the pocket in front doesn’t accommodate a water bottle.
United Airlines
7.4
Good
8,926 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Food

7.1

Overall

8.0

Comfort

7.8

Crew

8.5

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Sep 2025

SEA - MKE

The crew were excellent, flight good, but the actual space for a person to occupy for 4 hours seems to get smaller and smaller 🤣. I am not overweight, and average height….very uncomfortable,, especially when I couldn’t recliner the seat at all, and the pocket in front doesn’t accommodate a water bottle.
Frontier
5.8
Fair
3,173 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Food

7.1

Overall

8.0

Comfort

7.8

Crew

8.5

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Sep 2025

SEA - MKE

The crew were excellent, flight good, but the actual space for a person to occupy for 4 hours seems to get smaller and smaller 🤣. I am not overweight, and average height….very uncomfortable,, especially when I couldn’t recliner the seat at all, and the pocket in front doesn’t accommodate a water bottle.

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.

  • What airport do you fly from for flights from Seattle to Fort Collins?

    Most people fly from Seattle/Tacoma Intl (SEA) if they book a flight from Seattle to Fort Collins. On average, Seattle/Tacoma Intl has 35 outbound flights to Fort Collins per day from 6 airlines. Seattle/Tacoma Intl is conveniently located just 11.4 mi from Seattle’s city center.

  • How popular is this Seattle to Fort Collins flight route?

    Within the past month, 306 users have taken a look at flights from Seattle/Tacoma Intl to Fort Collins.

  • How long is the flight from Seattle to Fort Collins?

    Delta can get you from Seattle to Fort Collins in just under 2h 44m. Your travel time will be generally consistent. The distance from Seattle to Fort Collins is about 1022 mi. All flights are typically nonstop.

  • What are the most reliable airlines from Seattle to Fort Collins?

    The top 3 most reliable airlines when flying from Seattle to Fort Collins are ANA (82%), China Airlines (82%) and United Airlines (79%).

  • What are the cheapest flights from Seattle to Fort Collins?

    The cheapest flight price from Seattle to Fort Collins is $79. On average you can expect to pay $655. The most popular route, (Seattle/Tacoma Intl - Denver Intl), can usually be booked for $86.

  • Can I find deals for flights from Seattle to Fort Collins that include hotel bookings?

    Yes. In addition to deals on Seattle to Fort Collins flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Seattle to Fort Collins?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Seattle to Fort Collins.

  • Can I find deals for business class flights from Seattle to Fort Collins?

    Yes. Cheapflights offers flight deals from Seattle to Fort Collins by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Seattle to Fort Collins?

    Currently, October is the cheapest month in which you can book a flight from Seattle to Fort Collins (average of $197). Flying from Seattle to Fort Collins in March is currently the most expensive (average of $278). 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.

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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 September 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$67Average$161FlexibilityNo cancel feeOn-time62%
Hawaiian AirlinesCheapest$87Average$232FlexibilityNo cancel feeOn-time85%
DeltaCheapest$117Average$250FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$127Average$252FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$149Average$422FlexibilityNo cancel feeOn-time69%
Alaska AirlinesCheapest$168Average$302FlexibilityNo cancel feeOn-time75%

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