฿1,550 Cheap Flights from Seattle (SEA) to Denver (DEN)

View ฿1,550 flight on Sat, 18 Apr 2026Opens 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 ฿1,550 for one-way flights and ฿3,360 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Tue, 31 Mar - Thu, 9 Apr
SEA
Seattle
DEN
Denver
฿3,360 Return, found 2 days ago
฿3,360
Return
found 2 days ago
Select Delta flight, departing Tue, 31 Mar from Seattle to Denver, returning Thu, 9 Apr, priced at ฿3,360 found 2 days ago
Delta
Thu, 23 Apr - Sun, 26 Apr
SEA
Seattle
DEN
Denver
฿3,740 Return, found 17 hours ago
฿3,740
Return
found 17 hours ago
Select Delta flight, departing Thu, 23 Apr from Seattle to Denver, returning Sun, 26 Apr, priced at ฿3,740 found 17 hours ago
Delta
Tue, 7 Apr - Tue, 14 Apr
SEA
Seattle
DEN
Denver
฿4,060 Return, found 19 hours ago
฿4,060
Return
found 19 hours ago
Select Delta flight, departing Tue, 7 Apr from Seattle to Denver, returning Tue, 14 Apr, priced at ฿4,060 found 19 hours ago
Delta
Tue, 31 Mar - Wed, 8 Apr
SEA
Seattle
DEN
Denver
฿4,300 Return, found 3 days ago
฿4,300
Return
found 3 days ago
Select Delta flight, departing Tue, 31 Mar from Seattle to Denver, returning Wed, 8 Apr, priced at ฿4,300 found 3 days ago
Delta
Tue, 7 Apr - Tue, 14 Apr
SEA
Seattle
DEN
Denver
฿4,375 Return, found 19 hours ago
฿4,375
Return
found 19 hours ago
Select Delta flight, departing Tue, 7 Apr from Seattle to Denver, returning Tue, 14 Apr, priced at ฿4,375 found 19 hours ago
United
Tue, 31 Mar - Thu, 9 Apr
SEA
Seattle
DEN
Denver
฿4,615 Return, found 2 days ago
฿4,615
Return
found 2 days ago
Select United flight, departing Tue, 31 Mar from Seattle to Denver, returning Thu, 9 Apr, priced at ฿4,615 found 2 days ago
Delta
Tue, 31 Mar - Thu, 9 Apr
SEA
Seattle
DEN
Denver
฿4,925 Return, found 2 days ago
฿4,925
Return
found 2 days ago
Select Delta flight, departing Tue, 31 Mar from Seattle to Denver, returning Thu, 9 Apr, priced at ฿4,925 found 2 days ago
United
Tue, 31 Mar - Wed, 8 Apr
SEA
Seattle
DEN
Denver
฿4,930 Return, found 3 days ago
฿4,930
Return
found 3 days ago
Select United flight, departing Tue, 31 Mar from Seattle to Denver, returning Wed, 8 Apr, priced at ฿4,930 found 3 days ago
Delta
Thu, 23 Apr - Sun, 26 Apr
SEA
Seattle
DEN
Denver
฿5,020 Return, found 17 hours ago
฿5,020
Return
found 17 hours ago
Select Delta flight, departing Thu, 23 Apr from Seattle to Denver, returning Sun, 26 Apr, priced at ฿5,020 found 17 hours ago
American Airlines
Tue, 31 Mar - Thu, 9 Apr
SEA
Seattle
DEN
Denver
฿5,275 Return, found 2 days ago
฿5,275
Return
found 2 days ago
Select American Airlines flight, departing Tue, 31 Mar from Seattle to Denver, returning Thu, 9 Apr, priced at ฿5,275 found 2 days ago

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 ฿3,360. 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.

Travel information

Origin airport
Seattle - Tacoma Intl.
Destination airport
Denver Intl.
Return price
฿3,360
Distance
1635 km
Average flight time
3 hours 39 mins

Book with confidence

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 , 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 ฿1,550 and roundtrip prices from ฿3,360. 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 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 to travel arrangements today and embark on the journey of a lifetime in Denver.
Perfect flights from Seattle to Denver
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