Cheap flights from Denver to Seattle
Cheapflights Tip: The best prices from Denver Intl to Seattle/Tacoma Intl are usually found in October or September, booked 39 days in advance, depart on a Saturday or Thursday and return on a Monday
Cheap flight deals from Denver to Seattle
Discover tips and strategies to find the most affordable flight options for your journey from Denver (DEN) to Seattle (SEA). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 11 September 2025.
Popular in | June |
|---|---|
Cheapest in | October |
Average price | C$ 243 |
Good one-way deal | C$ 199 or less |
Best time to book a flight from Denver to Seattle
Have a flexible travel schedule? Discover the best time to fly to Seattle from Denver with our price prediction graph.
Cheapflights Insights
Everything you need to know about your flight from Denver to Seattle
How far ahead should I book a flight from Denver to Seattle?
The best time to book flights from Denver to Seattle is 39 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 Denver to Seattle?
Currently, January is the cheapest month in which you can book a flight from Denver to Seattle (average of C$ 262). Flying from Denver to Seattle in December is currently the most expensive (average of C$ 353). 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 DEN to SEA?
Unlike at noon, when flights are generally more expensive, you can save up to 60% on flights from Denver to Seattle by exploring options for tickets in the afternoon.
Related info for your journey
Find useful and relevant information for your journey from Denver to Seattle. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Travelling to a place near Seattle?
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Alternative routes for Denver to Seattle
See prices for flight routes from nearby airports that may be better suited for you.
Fly with Cheapflights
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How does Cheapflights help users find flights from Denver to Seattle?
900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight to Seattle from Denver today with Cheapflights!
Why should you use Cheapflights to find cheap flight tickets from Denver to Seattle?
By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Seattle from Denver.
Can Cheapflights find flights from Denver to Seattle with no change fees?
Cheapflights does show flights with no change fees to all users. To see these options for flights from Denver to Seattle, users can toggle the no change fees filter when performing a flight search.
Can Cheapflights notify me if prices for flights from Denver to Seattle become cheaper?
Yes! Start tracking prices for Denver to Seattle flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.