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Fort Collins

$43+ 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 4/2. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — DEN
Jan 30 — Feb 61
Fri 1/30
Fri 2/6
1 adult, Economy
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Cheapflights Tip: The best prices from Seattle/Tacoma Intl to Fort Collins are usually found in January or September, booked 69 days in advance, depart on a Friday or Saturday and return on a Friday

Cheap 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 December 31, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 12/28. 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 12/311:25 pmSEA - DEN
Nonstop2h 53mFrontier
Mon 2/29:10 amDEN - SEA
Nonstop3h 09mFrontier
Deal found 12/28$142
This Kiwi.com deal was found by Cheapflights users on 12/28. 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 12/311:25 pmSEA - DEN
Nonstop2h 53mFrontier
Sat 1/1011:24 amDEN - SEA
Nonstop3h 10mFrontier
Deal found 12/28$186
This Kiwi.com deal was found by Cheapflights users on 12/28. 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 12/311:25 pmSEA - DEN
Nonstop2h 53mFrontier
Fri 1/99:10 amDEN - SEA
Nonstop3h 11mFrontier
Deal found 12/28$220
This Expedia deal was found by Cheapflights users on 12/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/311:25 pmSEA - DEN
Nonstop2h 53mMultiple Airlines
Mon 2/28:04 amDEN - SEA
1 stop7h 57mMultiple Airlines
Deal found 12/28$222
This Kiwi.com deal was found by Cheapflights users on 12/28. 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 12/302:54 pmSEA - DEN
Nonstop2h 49mFrontier
Thu 1/110:16 amDEN - SEA
Nonstop3h 14mFrontier
Deal found 12/28$250
This Frontier deal was found by Cheapflights users on 12/28. 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 12/311:25 pmSEA - DEN
Nonstop2h 53mFrontier
Thu 1/110:16 amDEN - SEA
Nonstop3h 14mFrontier
Deal found 12/28$253
This Kiwi.com deal was found by Cheapflights users on 12/28. 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 12/311:25 pmSEA - DEN
Nonstop2h 53mFrontier
Thu 1/89:10 amDEN - SEA
Nonstop3h 11mFrontier
Deal found 12/28$265
This Priceline deal was found by Cheapflights users on 12/29. 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.
Mon 12/292:54 pmSEA - DEN
Nonstop2h 49mFrontier
Mon 1/510:16 amDEN - SEA
Nonstop3h 14mFrontier
Deal found 12/29$269
This Cheapflightsfares deal was found by Cheapflights users on 12/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/292:54 pmSEA - DEN
Nonstop2h 49mFrontier
Thu 1/110:16 amDEN - SEA
Nonstop3h 14mFrontier
Deal found 12/29$272
This Frontier deal was found by Cheapflights users on 12/28. 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.
Mon 12/292:54 pmSEA - DEN
Nonstop2h 49mFrontier
Tue 12/3010:16 amDEN - SEA
Nonstop3h 14mFrontier
Deal found 12/28$278

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 December 31, 2025.

Most accurate provider

Mytrip
3 stars

Most trusted provider

Mytrip
3 stars

Round-trip from

$78
(Frontier)

One-way from

$43
(Expedia)

Popular in

December

Cheapest in

January

Average price

$258
Provider with most accurate pricing for Seattle/Tacoma Intl-Denver Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Denver Intl flights.
Search Deals
From Seattle/Tacoma Intl to Fort Collins
Search Deals
One-way flight from Seattle/Tacoma Intl to Fort Collins
Search Deals
High demand for flights, 0% potential price rise
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($4 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

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 December 31, 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

Thu 1/29

7:54 pm-11:35 pm

Nonstop2h 41m

Denver Intl

Sat 1/31

7:00 am-9:11 am

Nonstop3h 11m

$117

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Tue 2/24

5:40 pm-9:23 pm

Nonstop2h 43m

Denver Intl

Wed 2/25

7:00 am-9:10 am

Nonstop3h 10m

$117

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Fri 2/20

8:14 pm-11:59 pm

Nonstop2h 45m

Denver Intl

Tue 2/24

12:34 pm-2:41 pm

Nonstop3h 07m

$117

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Wed 1/28

7:54 pm-11:35 pm

Nonstop2h 41m

Denver Intl

Tue 2/3

7:00 am-9:11 am

Nonstop3h 11m

$117

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Tue 1/27

6:25 am-1:35 pm

1 stop6h 10m

Denver Intl

Tue 2/3

6:20 am-12:20 pm

1 stop7h 00m

$136

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Wed 1/28

1:45 pm-5:34 pm

Nonstop2h 49m

Denver Intl

Tue 2/3

6:29 am-8:40 am

Nonstop3h 11m

$137

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Mon 1/19

5:15 am-8:50 am

Nonstop2h 35m

Denver Intl

Tue 1/20

3:45 pm-5:50 pm

Nonstop3h 05m

$137

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Fri 3/6

5:30 am-12:00 pm

1 stop5h 30m

Denver Intl

Sun 3/8

6:30 am-8:36 am

Nonstop3h 06m

$137

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Thu 3/19

5:35 am-9:10 am

Nonstop2h 35m

Denver Intl

Mon 3/23

8:50 pm-10:50 pm

Nonstop3h 00m

$137

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Wed 2/4

7:54 pm-11:35 pm

Nonstop2h 41m

Denver Intl

Wed 2/11

8:04 am-3:01 pm

1 stop7h 57m

$137

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/29

Showing 1-10 of 22 results
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2
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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 December 26, 2025.

The best time to book flights from Seattle to Fort Collins is 69 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 July is currently the most expensive (average of $100). 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 December 31, 2025.

It’s typically best to fly out from Seattle to Fort Collins at noon. Doing so could potentially save you 25% 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 December 27, 2025.

Travelers seeking maximum savings on their Seattle to Fort Collins flight should consider departing on Friday at noon 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 December 31, 2025.

The most flights from SEA to FC9 are scheduled on a Monday (47 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (17 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 December 31, 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
11,589 reviews

Food

7.1

Comfort

7.8

Overall

8.0

Crew

8.5

Boarding

8.1

Entertainment

7.0

Reviews

1 / 20
4.0
Okay

Anonymous,Dec 2025

SEA - MSY

I really got a lesson in upgrades. I let my seat get chosen . Both times a middle seat...on purpose ...even when we were not full. That's petty I sat behind the first class . They got more than 1 drink ...and a snack . .and the staff actually talked to them...behind a see thru shawl/sheet in the aisle....... You could see over the seats just fine and you could hear the voices just fine. But the sheet let You KNOW. Your not welcome here. For a moment I regretted not spending 300 dollars per seat so I could see a smile and eat a sandwhich and enjoy my seat . The married couple drank champain and laughed and flirted with each other. It looked so happy and care free MONEY really does buy happiness ..the hateful glares and sighs from my seat mates brought me back to reality I wasn't rich and I still had 2 hours left in this middle seat.
Alaska Airlines
8.0
Very good
11,589 reviews
Alaska Airlines
8.0
Very good
11,589 reviews

Food

7.1

Comfort

7.8

Overall

8.0

Crew

8.5

Boarding

8.1

Entertainment

7.0

Reviews

1 / 20
4.0
Okay

Anonymous,Dec 2025

SEA - MSY

I really got a lesson in upgrades. I let my seat get chosen . Both times a middle seat...on purpose ...even when we were not full. That's petty I sat behind the first class . They got more than 1 drink ...and a snack . .and the staff actually talked to them...behind a see thru shawl/sheet in the aisle....... You could see over the seats just fine and you could hear the voices just fine. But the sheet let You KNOW. Your not welcome here. For a moment I regretted not spending 300 dollars per seat so I could see a smile and eat a sandwhich and enjoy my seat . The married couple drank champain and laughed and flirted with each other. It looked so happy and care free MONEY really does buy happiness ..the hateful glares and sighs from my seat mates brought me back to reality I wasn't rich and I still had 2 hours left in this middle seat.
Southwest
8.0
Very good
4,250 reviews
Alaska Airlines
8.0
Very good
11,589 reviews

Food

7.1

Comfort

7.8

Overall

8.0

Crew

8.5

Boarding

8.1

Entertainment

7.0

Reviews

1 / 20
4.0
Okay

Anonymous,Dec 2025

SEA - MSY

I really got a lesson in upgrades. I let my seat get chosen . Both times a middle seat...on purpose ...even when we were not full. That's petty I sat behind the first class . They got more than 1 drink ...and a snack . .and the staff actually talked to them...behind a see thru shawl/sheet in the aisle....... You could see over the seats just fine and you could hear the voices just fine. But the sheet let You KNOW. Your not welcome here. For a moment I regretted not spending 300 dollars per seat so I could see a smile and eat a sandwhich and enjoy my seat . The married couple drank champain and laughed and flirted with each other. It looked so happy and care free MONEY really does buy happiness ..the hateful glares and sighs from my seat mates brought me back to reality I wasn't rich and I still had 2 hours left in this middle seat.
Delta
7.9
Good
8,012 reviews
Alaska Airlines
8.0
Very good
11,589 reviews

Food

7.1

Comfort

7.8

Overall

8.0

Crew

8.5

Boarding

8.1

Entertainment

7.0

Reviews

1 / 20
4.0
Okay

Anonymous,Dec 2025

SEA - MSY

I really got a lesson in upgrades. I let my seat get chosen . Both times a middle seat...on purpose ...even when we were not full. That's petty I sat behind the first class . They got more than 1 drink ...and a snack . .and the staff actually talked to them...behind a see thru shawl/sheet in the aisle....... You could see over the seats just fine and you could hear the voices just fine. But the sheet let You KNOW. Your not welcome here. For a moment I regretted not spending 300 dollars per seat so I could see a smile and eat a sandwhich and enjoy my seat . The married couple drank champain and laughed and flirted with each other. It looked so happy and care free MONEY really does buy happiness ..the hateful glares and sighs from my seat mates brought me back to reality I wasn't rich and I still had 2 hours left in this middle seat.
United Airlines
7.4
Good
9,124 reviews
Alaska Airlines
8.0
Very good
11,589 reviews

Food

7.1

Comfort

7.8

Overall

8.0

Crew

8.5

Boarding

8.1

Entertainment

7.0

Reviews

1 / 20
4.0
Okay

Anonymous,Dec 2025

SEA - MSY

I really got a lesson in upgrades. I let my seat get chosen . Both times a middle seat...on purpose ...even when we were not full. That's petty I sat behind the first class . They got more than 1 drink ...and a snack . .and the staff actually talked to them...behind a see thru shawl/sheet in the aisle....... You could see over the seats just fine and you could hear the voices just fine. But the sheet let You KNOW. Your not welcome here. For a moment I regretted not spending 300 dollars per seat so I could see a smile and eat a sandwhich and enjoy my seat . The married couple drank champain and laughed and flirted with each other. It looked so happy and care free MONEY really does buy happiness ..the hateful glares and sighs from my seat mates brought me back to reality I wasn't rich and I still had 2 hours left in this middle seat.
Frontier
5.7
Fair
3,067 reviews
Alaska Airlines
8.0
Very good
11,589 reviews

Food

7.1

Comfort

7.8

Overall

8.0

Crew

8.5

Boarding

8.1

Entertainment

7.0

Reviews

1 / 20
4.0
Okay

Anonymous,Dec 2025

SEA - MSY

I really got a lesson in upgrades. I let my seat get chosen . Both times a middle seat...on purpose ...even when we were not full. That's petty I sat behind the first class . They got more than 1 drink ...and a snack . .and the staff actually talked to them...behind a see thru shawl/sheet in the aisle....... You could see over the seats just fine and you could hear the voices just fine. But the sheet let You KNOW. Your not welcome here. For a moment I regretted not spending 300 dollars per seat so I could see a smile and eat a sandwhich and enjoy my seat . The married couple drank champain and laughed and flirted with each other. It looked so happy and care free MONEY really does buy happiness ..the hateful glares and sighs from my seat mates brought me back to reality I wasn't rich and I still had 2 hours left in this middle seat.

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 31 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, 276 users have taken a look at flights from Seattle/Tacoma Intl to Fort Collins.

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

    Alaska Airlines can get you from Seattle to Fort Collins in just under 2h 41m. 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 cheapest airlines to fly from Seattle to Fort Collins one-way?

    For one-way options, check prices for Frontier. According to our data, you can fly for as low as $31. Users have also found prices from $69 and $69 on United Airlines and Delta, respectively.

  • 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 United Airlines (95%), Virgin Atlantic (94%) and ANA (93%).

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

    The cheapest flight price from Seattle to Fort Collins is $56. On average you can expect to pay $1,054. The most popular route, (Seattle/Tacoma Intl - Denver Intl), can usually be booked for $84.

  • 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, 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 July is currently the most expensive (average of $100). 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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Alternative routes for Seattle to Fort Collins

See prices for flight routes from nearby airports that may be better suited for you.
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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 December 31, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$60Average$167FlexibilityNo cancel feeOn-time62%
Hawaiian AirlinesCheapest$87Average$233FlexibilityNo cancel feeOn-time85%
DeltaCheapest$110Average$246FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$129Average$263FlexibilityNo cancel feeOn-time63%
Alaska AirlinesCheapest$141Average$292FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$147Average$424FlexibilityNo cancel feeOn-time69%

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