Fort Collins

$98+ 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 8/11. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — DEN
Jun 28 — Jul 51
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Cheapflights Tip: The best prices from Seattle/Tacoma Intl to Fort Collins are usually found in January or October, booked 61 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 May 29, 2026.

This Southwest deal was found by Cheapflights users on 5/28. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/116:10 pm
SEA
-
DEN
Nonstop2h 45m
Southwest
Wed 8/199:05 pm
DEN
-
SEA
Nonstop3h 00m
Southwest
Deal found 5/28$196
This Southwest deal was found by Cheapflights users on 5/28. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/116:10 pm
SEA
-
DEN
Nonstop2h 45m
Southwest
Tue 8/182:40 pm
DEN
-
SEA
2 stops7h 35m
Southwest
Deal found 5/28$211
This deal was found by Cheapflights users on 5/27. 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.
Thu 9/177:00 am
SEA
-
DEN
Nonstop2h 51m
Frontier
Mon 9/2110:29 pm
DEN
-
SEA
Nonstop2h 58m
Frontier
Deal found 5/27$213
This deal was found by Cheapflights users on 5/28. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/227:41 pm
SEA
-
DEN
Nonstop2h 55m
Frontier
Sat 8/2912:00 pm
DEN
-
SEA
Nonstop3h 04m
Frontier
Deal found 5/28$222
This Frontier deal was found by Cheapflights users on 5/24. 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.
Tue 9/299:16 pm
SEA
-
DEN
1 stop5h 36m
Frontier
Wed 9/307:30 am
DEN
-
SEA
1 stop6h 30m
Frontier
Deal found 5/24$225
This Frontier deal was found by Cheapflights users on 5/25. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/139:16 pm
SEA
-
DEN
1 stop5h 36m
Frontier
Wed 10/147:45 am
DEN
-
SEA
Nonstop3h 06m
Frontier
Deal found 5/25$227
This Cheapflightsfares deal was found by Cheapflights users on 5/29. 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.
Wed 7/18:12 pm
SEA
-
DEN
1 stop20h 52m
Frontier
Wed 7/87:25 am
DEN
-
SEA
1 stop11h 26m
Frontier
Deal found 5/29$228
This Cheapflightsfares deal was found by Cheapflights users on 5/26. 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 6/2311:53 am
SEA
-
DEN
1 stop20h 33m
Frontier
Tue 6/308:44 am
DEN
-
SEA
1 stop11h 13m
Frontier
Deal found 5/26$229

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 May 29, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$196
(Southwest)

One-way from

$98
(Southwest)

Popular in

June

Cheapest in

January

Average price

$267
Provider with most accurate pricing for Seattle/Tacoma Intl-Denver Intl flight deals.
Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Denver Intl flights.
From Seattle/Tacoma Intl to Fort Collins
One-way flight from Seattle/Tacoma Intl to Fort Collins
Highest demand for flights based on searches. 14% potential increase in price ($37 potential increase over avg. RT price).
Cheapest flight prices on average. 1% potential price decrease ($5 potential savings vs. average RT price).
Average for round-trip flights in May 2026

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 May 29, 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

Price

Cheapest round-trip

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Tue 8/11

8:30 am-5:05 pm

1 stop7h 35m

Denver Intl

Tue 8/18

12:50 pm-8:15 pm

2 stops8h 25m

$330

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Wed 7/15

7:30 am-3:50 pm

2 stops7h 20m

Denver Intl

Wed 7/22

7:25 pm-11:35 pm

1 stop5h 10m

$330

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Wed 6/24

7:30 am-3:50 pm

2 stops7h 20m

Denver Intl

Tue 6/30

6:15 am-11:15 am

1 stop6h 00m

$340

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Tue 6/30

7:30 am-3:50 pm

2 stops7h 20m

Denver Intl

Tue 7/7

12:35 pm-7:20 pm

2 stops7h 45m

$345
Quickest round-trip

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Sun 7/5

5:00 am-8:43 am

Nonstop2h 43m

Denver Intl

Mon 7/6

7:10 pm-9:10 pm

Nonstop3h 00m

$346

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Wed 6/24

7:30 am-5:05 pm

2 stops8h 35m

Denver Intl

Sat 6/27

4:10 pm-11:10 pm

2 stops8h 00m

$356

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Mon 8/24

11:50 am-6:45 pm

1 stop5h 55m

Denver Intl

Thu 8/27

2:05 pm-9:15 pm

2 stops8h 10m

$370

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Fri 7/24

7:30 am-4:05 pm

2 stops7h 35m

Denver Intl

Thu 7/30

9:10 pm-1:45 am

1 stop5h 35m

$371

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Fri 7/17

7:30 am-4:05 pm

2 stops7h 35m

Denver Intl

Sun 7/19

6:45 pm-1:15 am

1 stop7h 30m

$372

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Wed 7/1

5:30 am-11:53 am

1 stop5h 23m

Denver Intl

Wed 7/1

3:55 pm-10:05 pm

1 stop7h 10m

$381

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/28

Showing 1-10 of 22 resultsSorted by cheapest first
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3

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

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 May 29, 2026.

It’s typically best to fly out from Seattle to Fort Collins in the evening. Doing so could potentially save you 25% 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 May 29, 2026.

The most flights from SEA to FC9 are scheduled on a Thursday (41 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (12 on average).

How much does it cost to fly round-trip from Seattle to Fort Collins?

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 May 23, 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 May 29, 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.

Crew

8.6

Entertainment

7.5

Overall

8.0

Boarding

8.1

Food

7.0

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.

Crew

8.6

Entertainment

7.5

Overall

8.0

Boarding

8.1

Food

7.0

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.

Crew

8.6

Entertainment

7.5

Overall

8.0

Boarding

8.1

Food

7.0

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.

Crew

8.6

Entertainment

7.5

Overall

8.0

Boarding

8.1

Food

7.0

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.

Crew

8.6

Entertainment

7.5

Overall

8.0

Boarding

8.1

Food

7.0

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.

Crew

8.6

Entertainment

7.5

Overall

8.0

Boarding

8.1

Food

7.0

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.

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 25 outbound flights to Fort Collins per day from 7 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?

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

    Southwest and United Airlines can get you from Seattle to Fort Collins in just under 2h 43m. Your travel time can differ by up to 4h 52m. The distance from Seattle to Fort Collins is about 1022 mi. This flight may include one or multiple stops.

  • 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 $29. Users have also found prices from $58 and $60 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 STARLUX Airlines (99%), Icelandair (98%) and ANA (97%).

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

    The cheapest flight price from Seattle to Fort Collins is $93. On average you can expect to pay $620. The most popular route, (Seattle/Tacoma Intl - Denver Intl), can usually be booked for $213.

  • 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.

See more FAQs

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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 May 29, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$56Average$172FlexibilityNo cancel feeOn-time62%
Hawaiian AirlinesCheapest$69Average$213FlexibilityNo cancel feeOn-time85%
DeltaCheapest$91Average$240FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$117Average$265FlexibilityNo cancel feeOn-time63%
Alaska AirlinesCheapest$117Average$296FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$130Average$429FlexibilityNo cancel feeOn-time69%
JetBlueCheapest$200Average$328FlexibilityNo cancel feeOn-time62%

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