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

View AU$166 flight on Thu, 14 May 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 for one-way flights and round trip tickets for the period specified. Prices and availability are subject to change. Additional terms apply.

Alaska Airlines
Thu, 14 May - Thu, 21 May
DEN
Denver
SEA
Seattle
AU$360 Return, found 15 hours ago
AU$360
Return
found 15 hours ago
Select Alaska Airlines flight, departing Thu, 14 May from Denver to Seattle, returning Thu, 21 May, priced at AU$360 found 15 hours ago
Alaska Airlines
Thu, 14 May - Thu, 21 May
DEN
Denver
SEA
Seattle
AU$388 Return, found 15 hours ago
AU$388
Return
found 15 hours ago
Select Alaska Airlines flight, departing Thu, 14 May from Denver to Seattle, returning Thu, 21 May, priced at AU$388 found 15 hours ago
Alaska Airlines
Fri, 22 May - Fri, 5 June
DEN
Denver
SEA
Seattle
AU$400 Return, found 5 days ago
AU$400
Return
found 5 days ago
Select Alaska Airlines flight, departing Fri, 22 May from Denver to Seattle, returning Fri, 5 June, priced at AU$400 found 5 days ago
Alaska Airlines
Fri, 22 May - Fri, 5 June
DEN
Denver
SEA
Seattle
AU$401 Return, found 5 days ago
AU$401
Return
found 5 days ago
Select Alaska Airlines flight, departing Fri, 22 May from Denver to Seattle, returning Fri, 5 June, priced at AU$401 found 5 days ago
Delta
Wed, 2 Sept - Wed, 9 Sept
DEN
Denver
SEA
Seattle
AU$416 Return, found 1 day ago
AU$416
Return
found 1 day ago
Select Delta flight, departing Wed, 2 Sept from Denver to Seattle, returning Wed, 9 Sept, priced at AU$416 found 1 day ago
Delta
Thu, 14 May - Thu, 21 May
DEN
Denver
SEA
Seattle
AU$423 Return, found 15 hours ago
AU$423
Return
found 15 hours ago
Select Delta flight, departing Thu, 14 May from Denver to Seattle, returning Thu, 21 May, priced at AU$423 found 15 hours ago
Alaska Airlines
Fri, 22 May - Fri, 5 June
DEN
Denver
SEA
Seattle
AU$429 Return, found 5 days ago
AU$429
Return
found 5 days ago
Select Alaska Airlines flight, departing Fri, 22 May from Denver to Seattle, returning Fri, 5 June, priced at AU$429 found 5 days ago
Alaska Airlines
Wed, 2 Sept - Wed, 9 Sept
DEN
Denver
SEA
Seattle
AU$430 Return, found 1 day ago
AU$430
Return
found 1 day ago
Select Alaska Airlines flight, departing Wed, 2 Sept from Denver to Seattle, returning Wed, 9 Sept, priced at AU$430 found 1 day ago
Alaska Airlines
Wed, 2 Sept - Wed, 9 Sept
DEN
Denver
SEA
Seattle
AU$444 Return, found 1 day ago
AU$444
Return
found 1 day ago
Select Alaska Airlines flight, departing Wed, 2 Sept from Denver to Seattle, returning Wed, 9 Sept, priced at AU$444 found 1 day ago
United
Thu, 14 May - Thu, 21 May
DEN
Denver
SEA
Seattle
AU$451 Return, found 15 hours ago
AU$451
Return
found 15 hours ago
Select United flight, departing Thu, 14 May from Denver to Seattle, returning Thu, 21 May, priced at AU$451 found 15 hours ago

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

April is typically the cheapest month to fly

From AU$82 - AU$229 per traveller.

Frequently asked questions

How much is a flight from Denver Intl. Airport (DEN) to Seattle - Tacoma Intl. Airport (SEA)?
The lowest price advertised for a round-trip flight from Denver Intl. Airport (DEN) to Seattle - Tacoma Intl. Airport (SEA) is AU$360. But you better act quick. This price is taken from fares offered within the last 7 days on Expedia for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.
Do I need to pay a cancellation fee if I cancel my flight from Denver Intl. Airport (DEN) to SEA?
Every airline has a different set of terms and conditions. If you decide to cancel your trip, visit our Customer Service Portal.
How do I find cheap flights from Denver Airport to Seattle - Tacoma Intl. Airport (SEA) 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 Denver Intl. Airport (DEN) to Seattle - Tacoma Intl. Airport (SEA) flights, you'll see a "no change fees" filter for you to select.
How far is the flight from DEN to SEA?
Around 1 650 kilometres separates Denver and SeaTac, so pack some entertainment to keep you busy for a couple of hours. That latest bestseller you're eager to read will be perfect.
Which airlines fly direct from Denver Airport to Seattle - Tacoma Intl. Airport (SEA)?
Travelling from DIA airport to Sea-Tac Airport is easy when you have a nice range of airlines to choose from. Here are some of the best:

  • 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 Denver Intl. Airport (DEN) to Seattle - Tacoma Intl. Airport (SEA) flight tickets cheaper when they're purchased at the last minute?
Flight prices fluctuate, so it's no sure thing. While last-minute flight deals between DIA airport and Seattle - Tacoma Intl. Airport (SEA) are of course possible, it also makes sense to keep an eye on prices well before you fly. In fact, some airlines release their prices up to a year prior to the departure date. Expedia is constantly updating the best bargains around, so check back often and be ready to grab your seat when the fares dip.

Travel information

Origin airport
Denver Intl.
Destination airport
Seattle - Tacoma Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, United
Return price
AU$360
Distance
1635 km
Average flight time
1 hour 58 mins

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