$381 Cheap Flights from Denver (DEN) to Seattle (BFI)

View $381 flight on Sat, Sep 6, 2025Opens in a new window

Popular airlines from Denver Intl. Airport (DEN) to Seattle, WA (BFI-Boeing Field)

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Cheap Flights from Denver to Seattle (DEN-BFI)

Prices were available within the past 7 days and start at $381 for one-way flights and $751 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Alaska Airlines
Tue, Aug 12 - Sat, Aug 16
DEN
Denver
BFI
Seattle
$751 Roundtrip, found 6 days ago
$751
Roundtrip
found 6 days ago
Select Alaska Airlines flight, departing Tue, Aug 12 from Denver to Seattle, returning Sat, Aug 16, priced at $751 found 6 days ago
Alaska Airlines
Tue, Aug 26 - Sun, Sep 7
DEN
Denver
BFI
Seattle
$755 Roundtrip, found 1 day ago
$755
Roundtrip
found 1 day ago
Select Alaska Airlines flight, departing Tue, Aug 26 from Denver to Seattle, returning Sun, Sep 7, priced at $755 found 1 day ago
Alaska Airlines
Tue, Aug 12 - Wed, Aug 13
DEN
Denver
BFI
Seattle
$761 Roundtrip, found 6 days ago
$761
Roundtrip
found 6 days ago
Select Alaska Airlines flight, departing Tue, Aug 12 from Denver to Seattle, returning Wed, Aug 13, priced at $761 found 6 days ago
Alaska Airlines
Tue, Aug 26 - Sat, Sep 13
DEN
Denver
BFI
Seattle
$765 Roundtrip, found 1 day ago
$765
Roundtrip
found 1 day ago
Select Alaska Airlines flight, departing Tue, Aug 26 from Denver to Seattle, returning Sat, Sep 13, priced at $765 found 1 day ago
Alaska Airlines
Thu, Aug 14 - Sat, Aug 16
DEN
Denver
BFI
Seattle
$771 Roundtrip, found 6 days ago
$771
Roundtrip
found 6 days ago
Select Alaska Airlines flight, departing Thu, Aug 14 from Denver to Seattle, returning Sat, Aug 16, priced at $771 found 6 days ago
Alaska Airlines
Wed, Aug 27 - Sat, Sep 13
DEN
Denver
BFI
Seattle
$775 Roundtrip, found 1 day ago
$775
Roundtrip
found 1 day ago
Select Alaska Airlines flight, departing Wed, Aug 27 from Denver to Seattle, returning Sat, Sep 13, priced at $775 found 1 day ago
Alaska Airlines
Tue, Aug 12 - Fri, Aug 15
DEN
Denver
BFI
Seattle
$781 Roundtrip, found 6 days ago
$781
Roundtrip
found 6 days ago
Select Alaska Airlines flight, departing Tue, Aug 12 from Denver to Seattle, returning Fri, Aug 15, priced at $781 found 6 days ago
Alaska Airlines
Tue, Aug 26 - Mon, Sep 8
DEN
Denver
BFI
Seattle
$785 Roundtrip, found 1 day ago
$785
Roundtrip
found 1 day ago
Select Alaska Airlines flight, departing Tue, Aug 26 from Denver to Seattle, returning Mon, Sep 8, priced at $785 found 1 day ago
Alaska Airlines
Sun, Aug 24 - Sun, Sep 7
DEN
Denver
BFI
Seattle
$795 Roundtrip, found 1 day ago
$795
Roundtrip
found 1 day ago
Select Alaska Airlines flight, departing Sun, Aug 24 from Denver to Seattle, returning Sun, Sep 7, priced at $795 found 1 day ago
Alaska Airlines
Thu, Aug 7 - Sat, Aug 16
DEN
Denver
BFI
Seattle
$800 Roundtrip, found 4 hours ago
$800
Roundtrip
found 4 hours ago
Select Alaska Airlines flight, departing Thu, Aug 7 from Denver to Seattle, returning Sat, Aug 16, priced at $800 found 4 hours ago

Alternative airports near Seattle

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Snohomish County - Paine Field PAE. Cheapest option available. Average driving time to city center is 29 minutes. Flights from $765
PAE
Snohomish County - Paine Field
Cheapest
Average driving time to city center29 min
Flights from $765
Flights from Denver (DEN) to Seattle (BFI)
Origin airport
Denver Intl.
Destination airport
Boeing Field
Roundtrip price
$751
Distance
1024 mi

Denver to Seattle Flights

The cheapest times to fly from Denver to Seattle

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Denver to Seattle are during the month of August. You can find some of the cheapest flights from Denver to Seattle with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Denver to Seattle

Sunday is one of the best days to book for cheap flights from Denver to Seattle: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Denver to Seattle

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Denver to Seattle in 2025. You can also book with separate airlines for your outbound and return journeys, from $381 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Denver to Seattle flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Denver to Seattle airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from Denver Intl. Airport (DEN) to Boeing Field Airport (BFI) cost?
Discover the latest flight deals from DEN to BFI by entering your preferred travel dates and searching on Expedia. Easily compare prices by departure date if you have flexibility with your schedule and use handy filters to explore prices for your preferred journey. As a member of One Key™, our free loyalty program, you can use Price Tracking to watch fares and receive notifications if prices go up or down.
What is the cheapest month to fly from DEN to BFI?
The cheapest flights from DEN to BFI are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
What is the cheapest airline that flies from DEN to BFI?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that'll take you from DEN to BFI. Sort your results by "Price (lowest to highest)" to snap up a great deal.
How many flights per day from Denver Intl. Airport (DEN) to Boeing Field Airport (BFI)?
There are no daily direct flights from Denver Intl. Airport (DEN) to Boeing Field Airport (BFI). But you can opt for flights with layovers. Filter your search results on Expedia to include one or more stops, and you'll be cruising above the clouds in no time at all.
What day of the week has the most flights from DEN to BFI?
Friday is typically the busiest day for flights, while Tuesday tends to be the quietest.* Keep in mind that flight schedules can change depending on a number of factors, including the carrier and season.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Denver Intl. Airport (DEN) to Boeing Field Airport (BFI)?
Select a flight from Denver Intl. Airport (DEN) to Boeing Field Airport (BFI) that leaves before 3 PM to reduce the risk of delays and cancellations. Departures later than this have a 22% higher chance of being canceled, on average.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
What airports do you fly into for Seattle from Denver Intl. Airport (DEN)?
Seattle - Tacoma Intl. Airport (SEA) is the only airport in Seattle with direct flights from Denver Intl. Airport (DEN). Browse your options and find cheap fares on Expedia.
Is it cheaper to buy a plane ticket from Denver Intl. Airport (DEN) to Boeing Field Airport (BFI) last-minute?
Last-minute fares from DEN to BFI are typically more expensive. To secure the best prices, start looking for flights early. That being said, if your travel plans are flexible, it's possible to find a cheap ticket right before your trip.
Is it cheaper to book a DEN to BFI flight and hotel package?
Compared with arranging hotels and flights separately, booking a DEN to BFI flight and hotel package with Expedia could result in significant savings. What's more, having everything in one place will take the hassle out of planning your trip. Just secure your flights and select from our wide range of stays, then customize your trip with other add-ons like tours, car rentals and activities.
Can I cancel or change the date of my flight from Denver Intl. Airport (DEN) to Boeing Field Airport (BFI)?
In most cases, you can cancel or modify your DEN to BFI flight. However, additional fees may apply, especially if your booking was made more than 24 hours ago. Check your itinerary for the airline's fees and policies on flight changes, or if you need more information, visit our Customer Service portal.

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*Available to One Key members.