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Compare Cheap Flights from Denver to Seattle

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Round Trip Flights from Denver to Seattle

20 Feb
DEN
26 Feb
SEA
$ 62.96
01 Apr
DEN
29 Apr
SEA
$ 120.28
01 Apr
DEN
29 Apr
SEA
$ 150.46
01 Apr
DEN
29 Apr
SEA
$ 226.36
*Note: All fares are quoted in USD.

Last updated on Monday 01/27/2025 at 05:00 AM, the fares mentioned above are for flight tickets and inclusive of fuel surcharges, service fee and taxes. Based on historical data, these fares are subject to change without prior notice and cannot be guaranteed at the time of booking. Kindly go through our terms and conditions before booking.

Book Denver To Seattle Flights

Seattle is a cultural, commercial, and metropolitan city in Washington State. It is also one of the largest cities in North America. Seattle is home to an abundance of greenery with parks and forests around, which gives it the name - The Emerald City. The city is nothing less than an urban retreat where you can enjoy a leisurely visit. 

Seattle is all about art, culture, and food. Starbucks originated here to give a refreshing coffee. You can enjoy the craft beer, seafood, and also the famous Fran's Chocolates. The Pike Place Market is the best place to enjoy fresh seafood and buy artisanal souvenirs. Adding some thrill to your experience in Seattle, you can visit the Space Needle and enjoy the stunning view of the Seattle skyline. Other must-visit places in Seattle are Chihuly Garden and Glass, the Museum of Flight, Olympic Sculpture Park, and the Woodland Park Zoo. 

While May to August is the peak season, it is best to book cheap flights from Denver to Seattle for September, October, March,or April. Being shoulder season, you will get the best fare for your airline ticket from Denver to Seattle. Frontier, Alaska, Southwest, and United Airlines are among the top US carriers that operate DEN to SEA flights. Direct and connecting flights operate from Denver International Airport (DEN) to Seattle-Tacoma International Airport (SEA). To know more regarding Denver to Seattle flights, call our customer care team. We are here 24/7 to assist with flight deals and reservations. 

Finding Cheap Flights From Denver To Seattle : Frequently Asked Questions

* The mentioned flight facts are based on the last 3 months' data. Information regarding the highest and lowest booking months is based on the last 12 months' data.

Major Carriers Operating Flights From Denver To Seattle
Airline Cheapest Average

AMERICAN AIRLINES $128 $412

ALASKA AIRLINES $73 $199

FRONTIER AIRLINES $28 $131

Low Cost Carriers Operating Flights From Denver To Seattle
Airline Cheapest Average

FRONTIER AIRLINES $28 $131

ALASKA AIRLINES $73 $199

UNITED AIRLINES $108 $226

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One of the largest airlines in the world, American Airlines is known for its prompt service, exclusive in-flight facilities, and worldwide connectivity. American Airlines commenced operations in 1936, and it has been more than 80 years of being a trusted carrier for domestic and international passengers.