฿2,560 Cheap Flights from Seattle (SEA) to Denver (DEN)

View ฿2,560 flight on Wed, 22 Oct 2025Opens in a new window

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

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

Prices were available within the past 7 days and start at ฿2,560 for one-way flights and ฿5,120 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Sat, 11 Oct - Sat, 18 Oct
SEA
Seattle
DEN
Denver
฿5,120 Return, found 5 days ago
฿5,120
Return
found 5 days ago
Select Delta flight, departing Sat, 11 Oct from Seattle to Denver, returning Sat, 18 Oct, priced at ฿5,120 found 5 days ago
Delta
Wed, 1 Oct - Wed, 8 Oct
SEA
Seattle
DEN
Denver
฿5,440 Return, found 2 days ago
฿5,440
Return
found 2 days ago
Select Delta flight, departing Wed, 1 Oct from Seattle to Denver, returning Wed, 8 Oct, priced at ฿5,440 found 2 days ago
Delta
Thu, 23 Oct - Mon, 27 Oct
SEA
Seattle
DEN
Denver
฿5,705 Return, found 18 hours ago
฿5,705
Return
found 18 hours ago
Select Delta flight, departing Thu, 23 Oct from Seattle to Denver, returning Mon, 27 Oct, priced at ฿5,705 found 18 hours ago
Delta
Thu, 23 Oct - Sun, 26 Oct
SEA
Seattle
DEN
Denver
฿6,285 Return, found 18 hours ago
฿6,285
Return
found 18 hours ago
Select Delta flight, departing Thu, 23 Oct from Seattle to Denver, returning Sun, 26 Oct, priced at ฿6,285 found 18 hours ago
United
Sat, 11 Oct - Sat, 18 Oct
SEA
Seattle
DEN
Denver
฿6,420 Return, found 5 days ago
฿6,420
Return
found 5 days ago
Select United flight, departing Sat, 11 Oct from Seattle to Denver, returning Sat, 18 Oct, priced at ฿6,420 found 5 days ago
Delta
Sat, 27 Sept - Mon, 29 Sept
SEA
Seattle
DEN
Denver
฿6,680 Return, found 5 days ago
฿6,680
Return
found 5 days ago
Select Delta flight, departing Sat, 27 Sept from Seattle to Denver, returning Mon, 29 Sept, priced at ฿6,680 found 5 days ago
United
Wed, 1 Oct - Wed, 8 Oct
SEA
Seattle
DEN
Denver
฿6,745 Return, found 2 days ago
฿6,745
Return
found 2 days ago
Select United flight, departing Wed, 1 Oct from Seattle to Denver, returning Wed, 8 Oct, priced at ฿6,745 found 2 days ago
Delta
Wed, 1 Oct - Wed, 8 Oct
SEA
Seattle
DEN
Denver
฿6,750 Return, found 2 days ago
฿6,750
Return
found 2 days ago
Select Delta flight, departing Wed, 1 Oct from Seattle to Denver, returning Wed, 8 Oct, priced at ฿6,750 found 2 days ago
Delta
Thu, 23 Oct - Mon, 27 Oct
SEA
Seattle
DEN
Denver
฿7,005 Return, found 18 hours ago
฿7,005
Return
found 18 hours ago
Select Delta flight, departing Thu, 23 Oct from Seattle to Denver, returning Mon, 27 Oct, priced at ฿7,005 found 18 hours ago
American Airlines
Wed, 1 Oct - Wed, 8 Oct
SEA
Seattle
DEN
Denver
฿8,685 Return, found 2 days ago
฿8,685
Return
found 2 days ago
Select American Airlines flight, departing Wed, 1 Oct from Seattle to Denver, returning Wed, 8 Oct, priced at ฿8,685 found 2 days ago

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

October is typically the cheapest month to fly

From ฿2,197 - ฿3,620 per traveller.
Flight from Seattle to Denver route information
Origin airport
Seattle - Tacoma Intl.
Destination airport
Denver Intl.
Airlines serving
American Airlines, Delta, United
Return price
฿5,120
Distance
1635 km
Average flight time
3 hours 41 mins

Perfect flights from Seattle to Denver

Embark on an unforgettable journey without breaking the bank with Expedia's incredible deals on cheap flights from Seattle to Denver. Whether you're aching for a romantic escape with your partner, craving an adventurous solo expedition, or yearning to immerse yourself in the local history and culture, we've got you covered.
 
Picture yourself strolling through the streets of Denver, surrounded by breathtaking architecture and absorbing the vibrant atmosphere of this captivating city. Indulge in the mouth-watering local specialties, from tantalizing street food to exquisite fine dining. With Expedia, you can experience all of this and more, without sacrificing your budget.
 
Our flexible Seattle - Tacoma Intl. to Denver Intl. ticket options cater to your travel preferences, with incredible one-way fares from ฿2,560 and roundtrip prices from ฿5,120. Whether you're planning a short city break or a longer adventure, our dynamic pricing ensures that you find the best deals for your journey.
 
But the magic doesn't stop there. Expedia offers a range of partner services to enhance your trip. Rent a car at Denver Intl. and explore Denver and its surrounding areas at your own pace. Discover hidden gems off the beaten path, and create unforgettable memories. We also provide a handpicked selection of accommodations, from charming bed and breakfasts to luxury hotels, ensuring that you have a comfortable and memorable stay.
 
Planning your next great adventure is a breeze with Expedia. Our user-friendly platform, unbeatable prices, and round-the-clock customer support are designed to make your travel experience seamless and stress-free. So, why wait? Book your SEA to DEN travel arrangements today and embark on the journey of a lifetime in Denver.

Frequently asked questions

How much is a flight from SEA to Denver Airport?
If you're travelling between SEA and Denver Intl. Airport (DEN), round-trip journeys start from ฿5,120. This price is based on fares available within the last 7 days on Expedia for flights departing within the next year, so don't let a good deal pass you by. Book now and save yourself money and time. Prices and availability are subject to change. Additional terms apply.
Do I need to pay a cancellation fee if I cancel my flight from Sea-Tac Airport to Denver Airport?
This can differ between air carriers, as each has its own terms and conditions. Visit the Customer Service Portal, where there are instructions on how to cancel online.
How do I find cheap flights from Sea-Tac Airport to Denver Intl. Airport (DEN) that have flexible change policies?
Many airlines offer the option to reschedule your flight without a change fee. All you pay is the difference between the original flight and the new flight. When you're searching for Sea-Tac Airport to Denver Intl. Airport (DEN) flights, you'll see a "no change fees" filter for you to select.
How far is the flight from SEA to DIA airport?
The flight distance from SeaTac to Denver is 1,650 kilometres. Bring along a snack, a drink and an interesting novel to read. Keep yourself entertained and the time will fly by.
Which airlines fly direct from SEA to Denver Intl. Airport (DEN)?
It's easy to fly directly from Sea-Tac Airport to Denver Airport. These are the top carriers that operate nonstop services on this route:

  • United Airlines - (UA) with 147 monthly flights
  • Southwest Airlines - (WN) with 130 monthly flights
  • Alaska Airlines - (AS) with 117 monthly flights
  • Delta Air Lines - (DL) with 91 monthly flights

Are SEA to DEN flight tickets cheaper when they're purchased at the last minute?
It is possible to get a great last-minute deal from SEA to Denver Intl. Airport (DEN), but there's no guarantee. As many airlines publish prices up to 12 months in advance, it's worthwhile keeping an eye on fares early and being ready to pounce when you see a bargain. Expedia compares air carrier prices and updates flight deals all the time, so you can be sure you're always getting the latest offers.

Explore a world of travel with Expedia

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