Book Cheap Flight Tickets from Denver (DEN) to Seattle (SEA)

Enjoy the cheapest airfares on your Denver to Seattle flights!

From the expansive greenery to picturesque waterways, a trip to Seattle offers respite. The last thing you might want to do while planning your trip to Seattle is to go over budget and then worry about your expenses. We are here to ensure that you do not face hassle. That’s why we have gathered many deals to offer you a secure and budget-friendly journey. 

Be it to attend a business meeting at the last minute, watch your favorite professional sports event, or quench your adrenaline. We have deals for all. Check out our cheap flights from Denver to Seattle and save some dollars to spend on your trip. 

About Denver

Denver is a melting pot of modern attractions and natural beauty. The city is renowned for its picturesque setting and many ski resorts with the Rocky Mountains in its surroundings. The Mile High City is a haven for nature lovers and adventure enthusiasts with plenty of things to do and see, including camping, hiking, fishing, and skiing. Denver offers lively bars, thriving restaurants, and book shops with many fun family attractions.

About Seattle

Straddling the banks of the Lake Washington River, Seattle is surrounded by pristine water bodies and expansive greenery. The city is filled with dozens of trails, lush parks, and waterfronts within its limit, making it picturesque. Seattle houses great cultural attractions and flavorsome cuisine for its visitors and locals alike. The city also houses several shopping arcades, tech giants, and vibrant nightlife scenes.
Cheap Flights from Denver to Seattle

Click on the nearest Origin Airport of your choice to unlock various flight deals

Denver International Airport ( DEN )
Frontier Airlines
August 03, 2021
DEN
09:17

Denver International Airport

depart
11:29
SEA

Tacoma International Airport

From $104
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Alaska Airlines
August 03, 2021
DEN
16:56

Denver International Airport

depart
19:03
SEA

Tacoma International Airport

From $145
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United Airlines
August 03, 2021
DEN
06:00

Denver International Airport

depart
11:20
SEA

Tacoma International Airport

From $208
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All fares mentioned above are approximate unless indicated. Fares are round trip. Fares incl. all fuel surcharges, taxes and fees. Displayed fares are subject to change and cannot be guaranteed at the time of booking. See all booking terms and conditions.

FAQs on Denver to Seattle Flights
Which airlines fly directly from Denver to Seattle?

The airlines offering direct flights between Denver and Seattle are:

  • Alaska Airlines
  • Delta Air Lines
  • Delta Connection
  • Frontier Airlines
  • Southwest Airlines
  • United Airlines
  • United Express (seasonal)
I’m booking a direct/non-stop flight to Seattle from Denver. Which airport do I choose?
A non-stop flight from Denver to Seattle departs from Denver International Airport (DEN) and lands at Seattle-Tacoma International Airport (SEA). There are no other commercial airports in these two cities, so you do not have the liberty of choosing airports.
What is the flight duration between Denver and Seattle?
The flight distance between Denver and Seattle is about 1024 miles or 890 nautical miles. A non-stop flight from Denver takes about 3 hours to reach Seattle, Washington.
Which airline has the least delayed flights to Seattle from Denver?
As per the data available till May 2022, Delta Air Lines offers the least number of delayed flights between Denver and Seattle, followed by Alaska and Southwest Airlines.
Which is the cheapest day of the week to fly from Denver to Seattle?
As per the trend, Thursday is the cheapest day to fly from Denver to Seattle. Flights are pricier during the weekend, with Friday (evening) and Monday (morning) being the most expensive days to fly to Seattle from Denver.
Do I need to pay any fees or charges for canceling my flight from DEN to SEA?
Most airlines typically charge a penalty fee for changes or cancellations of flights. However, whether you incur a cancellation fee depends on your airline, airfare, and route. Please check the cancelation policy of the airlines or contact our customer support team for more information.
Do airlines offer sleeping areas to passengers traveling from Denver, Colorado?
There are no dedicated sleeping areas for passengers at Denver International Airport (DEN). However, airlines offer lounges where business and first-class ticket holders can relax and enjoy complimentary meals before taking off. Also, there are recliner chairs and pre-installed seats in the concourse area where passengers can sit and rest.
Am I allowed to carry food/eatables on my flight to Seattle?
You may carry food and eatables in your carry-on or checked baggage as long as it is solid and well packed according to the TSA policy. However, you cannot carry liquid, semi-liquid, and gel items on flights to Seattle.
What is the baggage allowance on a flight to Seattle?

The baggage allowance may vary with the airlines and the ticket fare. As per the standard for domestic flights in the USA, you can check in one piece of baggage and carry one in the cabin. 

  • The dimensions (length + width + height) of the checked baggage must not exceed 63 inches (159 cm) and the weight should be less than 50 pounds (23 kg). 
  • The carry-on weight cannot exceed 18 lbs (8 kg), and its dimensions must be compatible to fit in the overhead cabin or beneath the seat.
I lost my baggage during my flight to Seattle from Denver, Colorado. How can I recover it?
Contact the airlines immediately if you cannot find your baggage after a flight from Denver. Airlines are responsible for any lost, damaged, or delayed baggage during a flight. The airline will compensate you for the baggage and its content if it is lost during a flight. Contact our travel experts or check the airline and government policies for more information.
How would I get the best deal on my flight from Denver to Seattle?
Visit the Crystal Travel website regularly to get the best deals and offers for your flight journey. Our extensive search engine fetches some of the latest offers with just a few clicks. Alternatively, you can get regular updates on our dynamic deals by subscribing to our newsletter and stalking us on Facebook, Instagram, and Twitter. However, if you are still unsure, call our travel experts, they will give you all the latest offers available.
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