Flights from Denver to Seattle Tacoma

Our cheapest offers for flights from Denver to Seattle Tacoma

Here you can compare cheap flights from Denver (DEN) to Seattle Tacoma (SEA) for one-way or return trips. The following offers were searched for and found on idealo during the last few days. Or start your own flight search to Seattle Tacoma. Prices and availability may change at any time.

Outbound Return Airlines Shop Baggage Price
Best option
Denver
Seattle-Tacoma
Outbound
04/03/26
direct
AS0785
03h 02min
Return
04/16/26
direct
AS0642
02h 38min
Alaska Airlines ?
$223
Denver
Seattle-Tacoma
Outbound
04/03/26
direct
AS0643
03h 07min
Return
04/16/26
direct
AS0682
02h 54min
Alaska Airlines ?
$241
Denver
Seattle-Tacoma
Outbound
04/03/26
direct
AS0785
03h 02min
Return
04/16/26
direct
AS0602
02h 39min
Alaska Airlines
$247
Denver
Seattle-Tacoma
Outbound
04/03/26
direct
AS0785
03h 02min
Return
04/16/26
direct
AS0786
02h 41min
Alaska Airlines ?
$259
Denver
Seattle-Tacoma
Outbound
04/03/26
direct
F94545
03h 14min
Return
04/16/26
1 Stopover (MSP)
SY0286, SY0657
21h 43min
Frontier Airlines ?
$295
Denver
Seattle-Tacoma
Outbound
04/03/26
direct
AS0633
03h 01min
Return
04/16/26
direct
AS0682
02h 54min
Alaska Airlines ?
$325
Denver
Seattle-Tacoma
Outbound
04/03/26
1 Stopover (PDX)
AS0789, AS2190
04h 36min
Return
04/16/26
1 Stopover (PDX)
HA6826, HA6303
04h 13min
Alaska Airlines ?
$407
Denver
Seattle-Tacoma
Outbound
04/03/26
1 Stopover (LAX)
AA6429, AA6481
06h 39min
Return
04/16/26
1 Stopover (LAX)
AA4896, AA5003
08h 59min
American Airlines ?
$1,077
Prices based on recent searches, subject to last-minute changes
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Tips and tricks to help you find cheap flights from Denver to Seattle Tacoma

Favorite airline: Frontier Airlines
Frontier Airlines is the most popular airline for flights from Denver to Seattle-Tacoma.
Frontier Airlines
50 %
Delta
22 %
United Airlines
17 %
Direct flights are cheaper
Compared to flights with a stopover, direct flights are $227.00 cheaper on this route.
non stop flight
1 stop
03h 00min
07h 28min
$160
$387
The favorite connection is non-stop
Flights from Denver to Seattle-Tacoma are most often booked as a direct flight.
Route
bookings
Direct flights
03h 00min, from $160
94 %
1 stopover Salt Lake City International Airport, UT
07h 28min, from $387
6 %

Important flight information

Flight information: Denver - Seattle-Tacoma

Roundtrip from $222.60
Flight duration min. 03:00 / max. 09:35
Return flight duration min. 02:30/ max. 07:05
Distance 1647 km
Flights per week 159
Departure airport Airport Denver International Airport, CO (DEN)
Arrival airport Airport Seattle-Tacoma International Airport, WA (SEA)
Destination country Flights to United States
Alternative routes to United States
Alternative flights to Seattle-Tacoma
Flight destinations with a similar price
Flight destinations with a similar price