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Flights from Denver to Seattle

Airlines Flying from Denver to Seattle

Compare prices, find the option that best suits your travel needs, and enjoy a comfortable journey with a trusted airline.
Hawaiian Airlines logo Hawaiian Airlines Alaska Airlines logo Alaska Airlines Frontier Airlines logo Frontier Airlines

Flight deals from Denver to Seattle

We've found these cheap flights for you. You can book one-way or return flight tickets.

  • Round-trip
  • One way

Crossed out prices are calculated based on the average price of the corresponding route on Trip.com.

Flight Information from Denver to Seattle

Cheapest one-way flight price £29
Cheapest return ticket price £71
Off-season travel month March
Peak season for travel February
Flight distance 1,644.78km
Average flight time 3 hours 1 minute
Popular airline Alaska Airlines

Find the best time to fly from Denver to Seattle

We monitor flight fares to help you find the best deals effortlessly

Cheapest flights
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  • 18 25

  • Jun

    25 1
  • 1 8
  • 8 15
  • 15 22
  • 22 29

  • Jul

    29 6
  • 6 13
  • 13 20
  • 20 27

  • Aug

    27 3
  • 3 10
Displayed prices are calculated based on the cheapest average weekly prices of the corresponding route on Trip.com.

FAQ

How to find a cheap flight from Denver to Seattle

Wait until the last minute and flight costs are often sky-high. Plan ahead, book the right way, and your savings can soar. We have loads of saving tips to help you find a cheap flight from Denver to Seattle. Book your flights at the right time and save more.
1
Be flexible with your travel dates to get the cheapest flight from Denver to Seattle.
Simply tap "Date" on the flight search bar to browse through the calendar and check out airfare from Denver to Seattle over the next 6 months in 2025. If you're planning to fly within the next three months, it looks like the most affordable option is on Sat, May 31, with one-way flights priced at just £30.
2
Compare cheap flight deals from Denver to Seattle across hundreds of airlines.
With our extensive search, you can compare prices from over 500 airlines to find the cheapest flight tickets from Denver to Seattle. The cheapest airline for this route is Frontier Airlines.
3
Set up a Price Alert
By setting up a Price Alert for your journey from Denver to Seattle, you can easily keep an eye on ticket prices without having to check every day.
4
Don't miss out on cheap flight deals and promo codes from Denver to Seattle.
You can always find the latest offers through Trip.com Deals and Promo Codes for cheap flights. By signing up for a free membership, you'll get access to even more deals for your flights.
5
Book early or wait until the last minute.
It's usually best to book early. Flight tickets are often cheapest when they're first released, typically about a year before the departure date. So, have a look online as soon as the flights you're interested in become available. If you miss the cheapest time, you might still find some good deals as the departure date gets closer.
6
Search for flights on the go.
For the best travel flight booking experience, download the Trip.com app. You can search for cheap flights from Denver to Seattle and snag some exclusive deals just for you.

More Travel Options

  • Top Routes from Denver
  • Top Routes to Seattle
  • Popular Airlines