Denver → Seattle flights
Last observed price · Last checked: 1 Sep 2026 · Price may change
Short answer
Alaska Airlines flies Denver to Seattle non-stop. The lowest fare our own searches returned is €77, seen on 1 Sep 2026. The average across the fares we caught is €134. November 2026 is the cheapest month in our observations, at €77. These are prices our searches returned on the dates shown, not quotes; run a live search for today's fare.
Tickets found in the last 7 days
The lowest fares our queries caught, cheapest first.
Starting prices by month
The lowest fare our queries observed in each month. Open a month to see its days; click a day with no price and we will search it for you.
Round trip
Route facts
Frequently asked
Are there direct flights from Denver to Seattle?+−
Yes. We have seen non-stop flights on this route, flown by Alaska Airlines, Frontier Airlines, United Airlines, Southwest Airlines.
How much is a flight from Denver to Seattle?+−
The lowest fare we have observed is €77, found on 1 Sep 2026. Prices move, so read it as a floor rather than a quote.
Which airlines fly from Denver to Seattle?+−
These are the carriers we have seen on the route: Alaska Airlines, Frontier Airlines, United Airlines, Southwest Airlines.
When is the cheapest month to fly from Denver to Seattle?+−
In our observations November 2026 is the cheapest month so far, at €77.
Similar routes
More routes from Denver
More routes to Seattle
Last checked: 1 Sep 2026