$34 Cheap Flights from Denver to Seattle

Feel at ease with free flight cancellations within 24 hours of booking

Change your flight without a fee on select flights

Find The Best Dates To Fly from Denver Intl. to Seattle - Tacoma Intl.

Amazing DEN to SEA Flight Deals

The cheapest flights to Seattle - Tacoma Intl. found within the past 7 days were $68 round trip and $34 one way. Prices and availability subject to change. Additional terms may apply.

Best Seattle - Tacoma Intl. Flight and Hotel Packages

Seattle - Tacoma Intl. flight + hotel packages - economy flights

Level Seattle Downtown - South Lake Union
Comfort Inn & Suites Sea-Tac Airport
Sleep Inn - SeaTac Airport
Hilton Bellevue
La Quinta Inn & Suites by Wyndham Seattle Sea-Tac Airport
Don't see what you're looking for?
See all available trips from Denver Intl. to Seattle - Tacoma Intl.
View all trips

Frequently asked questions

Can I catch a flight from DIA airport to Sea-Tac Airport right now?
It’s always wise to find out about any travel advice reports and quarantine requirements in effect in your destination. Ensure you check out our Covid-19 Travel Advisor for up-to-date information on catching a flight to SEA.
Are there direct flights from DIA airport to SEA?
Kick off your escape calm and relaxed and head straight to Sea-Tac Airport from DIA airport. United Airlines and Southwest Airlines are among the airlines that sell direct services on this route.
If I am not able to travel due to COVID-19, can I change my booking to a later date?
For more info about changing your flight to Sea-Tac Airport, please visit our Customer Service Portal.
How long is the flight from DEN to SEA?
If you’re flying from Denver to Seattle, you can expect the journey to take an average of 3 hours and 2 minutes. If this sounds longer than you had hoped, why not make the most of it? Read up on your destination, fine tune your itinerary and have a nap before the adventure starts.
What is the flight distance from DEN to Seattle - Tacoma Intl. Airport (SEA)?
The flight distance from DEN to SEA is 1,000 mi. Make sure to pack some reading material or a few podcasts to make the journey more relaxing.
What airlines fly from DIA airport to Seattle - Tacoma Intl. Airport (SEA)?
With quite a few airlines operating direct flights from Denver Intl. Airport (DEN) to Seattle - Tacoma Intl. Airport (SEA), you shouldn’t have a problem finding that perfect fare. Here are some of the top air carriers:

  • United Airlines - (UA) with 182 flights every month
  • Southwest Airlines - (WN) with 178 flights every month
  • Alaska Airlines - (AS) with 121 flights every month
  • Delta - (DL) with 121 flights every month

What airlines have practices regarding COVID-19 in place and use social distancing?
From the moment you enter the departure terminal to when you leave the arrivals terminal, if you’re flying with Alaska Airlines, Delta or Southwest Airlines you can be sure that COVID-19 measures and social distancing rules have been adhered to. Many airlines have introduced capped capacity flights and keeping the middle seat empty.
What is the best day to buy a plane ticket?
This just in! Airfares offered on Thursdays tend to be the cheapest, according to flight demand on Travelocity in 2021. Tuesday and Wednesday prices are also good, but you may want to prepare your budget if booking during the weekend, as data shows that is when prices are generally at their highest.
What are the cheapest days to fly?
Frequent travelers may already know this, but earlier in the week can be the cheapest time to fly. In 2021, flights departing on a Monday were generally the cheapest of the week, whereas you may pay a premium for weekend flights when demand is usually high. On average, tickets were most expensive for Saturday departures, so if you need to fly out on a weekend, you might look for deals ahead of time.
How far in advance can you book a flight?
Trying to figure out how early you should book your flight? It’s possible to start comparing international airfares on Travelocity up to 12 months in advance. However, it does depend on the carrier as not all airlines release their prices that far out. According to our 2021 flight demand trends, last minute planners can still bag a bargain with some of the cheapest fares appearing 0-2 weeks prior to their travel dates.*According to flight demand on Travelocity.com from January to December 2021. Savings are subject to change based on departure location, date and destination.


Traveling From Denver Intl.
Traveling To Seattle - Tacoma Intl.
Shortest Flight Time 3 hours 0 mins
Earliest Departure Time 6:15AM MST
Latest Departure Time 10:15PM MST
Lowest Flight Price $68

Route Info

Flight path for flights from Denver International Airport to Seattle-Tacoma International Airport

1,028.00 miles

Airlines & Aircraft Used on DEN to SEA Flight Routes

Airline Carrier
United Airlines
Aerospatiale/Alenia ATR 42-300 / 320

Discover our best flights from Denver DEN to Seattle SEA. 

With 20 airlines to choose from on Travelocity, you can easily find the best option for you. Use our filters to sort by price, compare airlines, and find the most convenient flight times. 


Find our best return flights from Denver DEN to Seattle SEA at the right price  

Airfares to Seattle SEA from Denver DEN currently cost between $68 and $102. It’s usually cheaper to book a round trip than two separate one-way flights. Prices and availability subject to change. Additional terms may apply. 


Book one-way flights from Denver DEN to Seattle SEA 

If you want to be flexible about when you return, or keep your travel options open ended, a one-way flight could be just the ticket! You’ll find one-way airfares from Denver DEN to Seattle SEA on Travelocity starting at $34. Prices and availability subject to change. Additional terms may apply. 


Get to Seattle SEA from Denver DEN quicker with direct flights. 

Get to Seattle faster, without the hassle of changing planes and moving baggage, by booking a direct flight. Expect your direct flight to SEA from DEN to take around 3 hour(s) 0 min(s).  


Find our cheapest airfares for flights from Denver DEN to Seattle SEA

Find cheap flight deals by using our search filters to sort results starting with the lowest price airfares to SEA from DEN. Our Price Match Promise means if you find a lower rate on Travelocity.com or on another US-based website within 24 hours of booking, we’ll credit or refund the difference.  


Get our best airfare deals for your flight from Denver DEN to Seattle SEA today 

If you’re flexible about when you travel, February is usually the cheapest month to fly from Denver DEN to Seattle SEA. If you need to be more specific, search by date and arrival and departure times.Then, compare prices across different airlines, and sort results by lowest price first. 


Book flexible airline tickets for flights to Seattle SEA from Denver DEN 

Some airlines let you change your travel dates without charging a fee. Use our ‘no change fee’ filter to see which flights to SEA from DEN have this option.  


Travel with confidence when you book flights to Seattle SEA from Denver DEN with Travelocity 

We’ve secured fantastic deals with all the main airline carriers and it’s easy to compare, choose, and book with Travelocity. With 24/7 customer service and our free 'App', we’ll always keep you moving. 

*Price based on the lowest price found within past 24 hours and based upon one night stay for two adults over the next thirty days. Prices and availability subject to change. Additional terms may apply.