CA $134 Cheap Flights from Denver (DEN) to Seattle (SEA)

View CA $134 flight on Mon, Jun 15, 2026Opens in a new window

Popular airlines from Denver International Airport (DEN) to Seattle-Tacoma International Airport (SEA)

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Cheap flights from Denver (DEN) to Seattle (SEA)

Prices were available within the past 7 days and start at CA $134 for one-way flights and CA $268 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Alaska Airlines
Wed, Jun 3 - Tue, Jun 9
DEN
Denver
SEA
Seattle
CA $268 Roundtrip, found 18 hours ago
CA $268
Roundtrip
found 18 hours ago
Select Alaska Airlines flight, departing Wed, Jun 3 from Denver to Seattle, returning Tue, Jun 9, priced at CA $268 found 18 hours ago
Delta
Wed, Jun 3 - Tue, Jun 9
DEN
Denver
SEA
Seattle
CA $268 Roundtrip, found 18 hours ago
CA $268
Roundtrip
found 18 hours ago
Select Delta flight, departing Wed, Jun 3 from Denver to Seattle, returning Tue, Jun 9, priced at CA $268 found 18 hours ago
Delta
Wed, Jun 3 - Tue, Jun 9
DEN
Denver
SEA
Seattle
CA $281 Roundtrip, found 18 hours ago
CA $281
Roundtrip
found 18 hours ago
Select Delta flight, departing Wed, Jun 3 from Denver to Seattle, returning Tue, Jun 9, priced at CA $281 found 18 hours ago
Alaska Airlines
Wed, Jun 3 - Tue, Jun 9
DEN
Denver
SEA
Seattle
CA $295 Roundtrip, found 18 hours ago
CA $295
Roundtrip
found 18 hours ago
Select Alaska Airlines flight, departing Wed, Jun 3 from Denver to Seattle, returning Tue, Jun 9, priced at CA $295 found 18 hours ago
Delta
Wed, May 27 - Wed, Jun 3
DEN
Denver
SEA
Seattle
CA $296 Roundtrip, found 3 days ago
CA $296
Roundtrip
found 3 days ago
Select Delta flight, departing Wed, May 27 from Denver to Seattle, returning Wed, Jun 3, priced at CA $296 found 3 days ago
Delta
Wed, May 27 - Wed, Jun 3
DEN
Denver
SEA
Seattle
CA $298 Roundtrip, found 3 days ago
CA $298
Roundtrip
found 3 days ago
Select Delta flight, departing Wed, May 27 from Denver to Seattle, returning Wed, Jun 3, priced at CA $298 found 3 days ago
Alaska Airlines
Fri, May 22 - Wed, May 27
DEN
Denver
SEA
Seattle
CA $308 Roundtrip, found 17 hours ago
CA $308
Roundtrip
found 17 hours ago
Select Alaska Airlines flight, departing Fri, May 22 from Denver to Seattle, returning Wed, May 27, priced at CA $308 found 17 hours ago
Alaska Airlines
Wed, May 27 - Wed, Jun 3
DEN
Denver
SEA
Seattle
CA $309 Roundtrip, found 3 days ago
CA $309
Roundtrip
found 3 days ago
Select Alaska Airlines flight, departing Wed, May 27 from Denver to Seattle, returning Wed, Jun 3, priced at CA $309 found 3 days ago
American Airlines
Wed, Jun 3 - Tue, Jun 9
DEN
Denver
SEA
Seattle
CA $512 Roundtrip, found 18 hours ago
CA $512
Roundtrip
found 18 hours ago
Select American Airlines flight, departing Wed, Jun 3 from Denver to Seattle, returning Tue, Jun 9, priced at CA $512 found 18 hours ago
United
Mon, Jun 1 - Thu, Jun 18
DEN
Denver
SEA
Seattle
CA $513 Roundtrip, found 2 days ago
CA $513
Roundtrip
found 2 days ago
Select United flight, departing Mon, Jun 1 from Denver to Seattle, returning Thu, Jun 18, priced at CA $513 found 2 days ago

Alternative airports near Seattle

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Seattle - Tacoma Intl. SEA. Cheapest option available. Average driving time to city centre is 20 minutes. Flights from CA $437
SEA
Seattle - Tacoma Intl.
Cheapest
Average driving time to city centre20 min
Flights from CA $437

Find the cheapest month to fly from Denver (DEN) to Seattle (SEA)

April is typically the cheapest month to fly

From CA $78 - CA $219 per traveller.

Frequently asked questions

How much does a flight from Denver, CO (DEN-Denver Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.) cost?
One-way flights typically cost between $274 and $1,591 and return flights often range between $704 and $2,468. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see the cheapest fares first, and use the Price Tracking tool to receive alerts when Anaa (AAA) to Toronto, ON (YYZ-Pearson Intl.) ticket fares go up or down.
What is the cheapest month to fly from Denver, CO (DEN-Denver Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
February is typically the cheapest month to fly from Denver, CO (DEN-Denver Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.), with average round-trip fares of approximately 553 CAD. This is about 13% lower than the average price throughout the year. February often sees lower prices because it falls outside of peak holiday seasons, leading to reduced demand. Other cheap months to fly from Denver, CO (DEN-Denver Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.) include January and October.
Which airlines fly direct from Denver, CO (DEN-Denver Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
Enter DEN to SEA and your travel dates, then apply the 'Nonstop' filter to see only direct flights.
How do I find cheap flights from Denver, CO (DEN-Denver Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
To find a cheap flight from Denver, CO (DEN-Denver Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the best airline to fly with from Denver, CO (DEN-Denver Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
The best airline to fly with from Denver, CO (DEN-Denver Intl.) (DEN) to Seattle, WA (SEA-Seattle - Tacoma Intl.) (SEA) will differ from traveler to traveler. If you like to fly early, WN offers early morning flights. If price is the most important factor, F9 typically offers the lowest fares. WN offers the most daily flights from Denver, CO (DEN-Denver Intl.) (DEN) to Seattle, WA (SEA-Seattle - Tacoma Intl.) (SEA), which is great if flexibility is what you value most. The best carrier for this journey could also be the one you have a loyalty membership with, as flying with that airline or another airline within the same alliance could help you collect points or enjoy lounge access.
What is the best time to fly from Denver, CO (DEN-Denver Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
Based on booking data from the past year, the cheapest months to fly from Denver Intl. (DEN) to Seattle - Tacoma Intl. (SEA) are typically February and January, with average prices around 553 CAD. However, the most popular months for this route are June and October, which means you'll find plenty of flight options during those times. If you're looking for the best value, consider traveling in the cheaper months, but be aware that flight availability might be slightly less compared to peak seasons.
How many flights per day from Denver, CO (DEN-Denver Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
There are approximately 17 nonstop flights per day from Denver, CO (DEN-Denver Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.). For even more choice, look at flights that include layovers, as there are around 211 connecting flights per day. Some common connection points include Sky Harbor Intl. (PHX), McCarran Intl. (LAS), and Salt Lake City Intl. (SLC).
What is the earliest flight from Denver, CO (DEN-Denver Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
The earliest flight from Denver, CO (DEN-Denver Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.) typically departs at approximately 12:20 AM local time, operated by Delta Air Lines. This is a seasonal service active in December. An early departure like this can help you maximize your time at your destination. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
What day of the week has the most flights from Denver, CO (DEN-Denver Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
You'll typically find the most flights from Denver, CO (DEN-Denver Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.) on a Friday, with around 113 flights available. This gives you plenty of options for your travel plans. Major airlines on this route include Southwest Airlines, United Airlines, and American Airlines. Flight options on Friday are notably more than other days, offering you a good selection.
What are the most popular departure times for flights from Denver, CO (DEN-Denver Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
The most popular departure times for flights from Denver, CO (DEN-Denver Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.) are in the early morning, from 6am to 9am. About 32% of passengers prefer this time. This timing works well because you can get an early start to your travel day and arrive in Seattle with plenty of time to spare.
How long does it take to fly from Denver, CO (DEN-Denver Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
A nonstop flight from DEN to SEA typically takes around 3 hours, covering approximately 1,022 miles. Connecting flights on this route usually add 5 hours 20 minutes to your travel time. Keep in mind that actual flight times can vary due to wind patterns, weather, and air traffic.
Can you fly business or first class from Denver, CO (DEN-Denver Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
Select the "Business class" and "First class" filters when looking for DEN to SEA flights on Expedia. This is the easiest way to compare prices, routes and flight times for your trip.
How do I earn miles on a Denver, CO (DEN-Denver Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.) flight with Expedia?
It's easy to earn miles on a Denver, CO (DEN-Denver Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia. *Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.
What airports do you fly into for Seattle from Denver Intl. (DEN)?
From Denver Intl. (DEN), you can fly directly into Seattle - Tacoma Intl. (SEA) to reach Seattle. Some flights may connect through major hubs like San Diego Intl. (SAN), Seattle - Tacoma Intl. (SEA), Los Angeles Intl. (LAX) before reaching Seattle. Compare routes and airports on Expedia to find the best flight options for your travel plans.
Is it cheaper to buy a plane ticket from Denver, CO (DEN-Denver Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.) at the last minute?
Typically, booking a last minute flight from Denver, CO (DEN-Denver Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a Denver, CO (DEN-Denver Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.) flight and hotel package?
Securing a Denver, CO (DEN-Denver Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.) flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Denver, CO (DEN-Denver Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
If you booked your Denver, CO (DEN-Denver Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

Travel information

Origin airport
Denver Intl.
Destination airport
Seattle - Tacoma Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, JetBlue Airways, United
Roundtrip price
CA $268
Distance
1635 km
Average flight time
1 hour 58 mins

Book with confidence

Denver to Seattle Flights

The easy way to book your flights from Denver to Seattle 

With Expedia, it’s simple to find and book flights to Seattle from Denver whether you’re traveling for business or pleasure. Enter your travel dates, hit search, and choose your flight from 20 airlines that cover this route. There are nonstop flights to Seattle - Tacoma Intl., too.  

Choose your preferred carrier and cabin class with the advanced search tool and select your ideal departure time. Then, if you want, you can see just nonstop or refundable flights. And if you’re traveling last minute, just enter the date to check out flights from Denver to Seattle today, tomorrow, or this week.  

 

Save dollars with cheap flights from Denver Intl., DEN to Seattle - Tacoma Intl., SEA 

Sort your search results by price to find great deals on your flight from Denver to Seattle—you get all your cheapest options first. Grab yourself a bargain now—the lowest price on flights to Seattle from Denver currently is just CA $268 rising to CA $513.  

Here are more money-saving tips: 

  • Fly in June when flight prices are normally at their lowest 
  • Book about a month to 6 weeks before you travel for the best prices to Seattle  
  • Avoid peak season and weekends when flights can cost more
  • Early morning and late-night flights are sometimes cheaper, so try varying your travel times 
  • One surefire way to save money on your flight is to book your flight and hotel together with Expedia. Sometimes, the savings are so large that the flight is basically free! 

 

Reasons to choose Expedia for your flight to Seattle from Denver 

Whatever your destination, budget, or reason to travel, in just one quick search, you can choose from loads of flights, airlines, and cabin classes. The filters make it quick and easy to find your ideal flights, and if you choose one of the flexible options, you won’t be charged to change your flight. So book your flight to Seattle with Expedia today.

Denver to Seattle Flights

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