Find Cheap Flights to Seattle

Depart
Return
1 adult
Adults
18-64
Seniors
65+
Youths
12-17
Children
2-11
Seat Infants
under 2
Lap Infants
under 2
Students
under 26
The price shown for each flight will be the average for all passengers including any infants.
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(Round-trip)
Depart: Thu Dec 8 2016 Return: Sun Dec 11 2016 Trip spans 4 days
Major Airline
Major Airline
DEN
SEA
3h 15m
nonstop
SEA
DEN
2h 36m
nonstop
Depart: Fri Feb 24 2017 Return: Mon Feb 27 2017 Trip spans 4 days
Frontier
Frontier
DEN
SEA
3h 10m
nonstop
SEA
DEN
2h 36m
nonstop
Depart: Tue Jan 10 2017 Return: Wed Jan 18 2017 Trip spans 9 days
Spirit Airlines
Spirit Airlines
LAX
SEA
2h 49m
nonstop
SEA
LAX
2h 34m
nonstop
Depart: Sat Feb 18 2017 Return: Sat Feb 25 2017 Trip spans 8 days
Delta
Delta
SJC
SEA
2h 30m
nonstop
SEA
SJC
2h 10m
nonstop
Depart: Sat Feb 25 2017 Return: Sat Mar 4 2017 Trip spans 8 days
Alaska Airlines
Alaska Airlines
OAK
SEA
2h 00m
nonstop
SEA
OAK
1h 59m
nonstop
Depart: Tue Mar 7 2017 Return: Wed Mar 8 2017 Trip spans 2 days
Virgin America
Virgin America
SFO
SEA
2h 00m
nonstop
SEA
SFO
2h 10m
nonstop
Depart: Sat Apr 29 2017 Return: Wed May 3 2017 Trip spans 5 days
JetBlue
JetBlue
LGB
SEA
2h 43m
nonstop
SEA
LGB
2h 35m
nonstop
Depart: Sun Feb 19 2017 Return: Mon Feb 27 2017 Trip spans 9 days
Major Airline
Major Airline
DEN
SEA
2h 55m
nonstop
SEA
DEN
2h 36m
nonstop
Depart: Wed Mar 8 2017 Return: Sat Mar 11 2017 Trip spans 4 days
Frontier
Frontier
DEN
SEA
2h 59m
nonstop
SEA
DEN
2h 38m
nonstop
Depart: Mon Dec 5 2016 Return: Wed Dec 7 2016 Trip spans 3 days
American Airlines
American Airlines
PHX
SEA
3h 10m
nonstop
SEA
PHX
2h 50m
nonstop
Depart: Fri Mar 3 2017 Return: Mon Mar 6 2017 Trip spans 4 days
Major Airline
Major Airline
DEN
SEA
3h 03m
nonstop
SEA
DEN
2h 23m
nonstop
Depart: Mon Mar 20 2017 Return: Sat Mar 25 2017 Trip spans 6 days
Major Airline
Major Airline
DEN
SEA
2h 54m
nonstop
SEA
DEN
2h 38m
nonstop
Depart: Wed Dec 7 2016 Return: Sat Dec 10 2016 Trip spans 4 days
Frontier
Frontier
PHX
SEA
3h 20m
nonstop
SEA
PHX
2h 58m
nonstop
Depart: Tue Apr 11 2017 Return: Sun Apr 16 2017 Trip spans 6 days
Southwest
Southwest
PHX
SEA
3h 10m
nonstop
SEA
PHX
2h 45m
nonstop
Depart: Tue Jan 10 2017 Return: Thu Jan 12 2017 Trip spans 3 days
United
United
DEN
SEA
3h 06m
nonstop
SEA
DEN
2h 38m
nonstop
Depart: Tue Jan 24 2017 Return: Tue Jan 31 2017 Trip spans 8 days
Spirit Airlines
Spirit Airlines
LAX
SEA
2h 49m
nonstop
SEA
LAX
2h 34m
nonstop
Depart: Tue Dec 6 2016 Return: Fri Dec 9 2016 Trip spans 4 days
Major Airline
Major Airline
PHX
SEA
3h 00m
nonstop
SEA
PHX
3h 02m
nonstop
Depart: Tue Feb 7 2017 Return: Tue Feb 14 2017 Trip spans 8 days
Spirit Airlines
Spirit Airlines
LAX
SEA
2h 49m
nonstop
SEA
LAX
2h 45m
nonstop
Depart: Sat Feb 25 2017 Return: Tue Feb 28 2017 Trip spans 4 days
Delta
Delta
SMF
SEA
2h 10m
nonstop
SEA
SMF
1h 55m
nonstop
Depart: Tue Mar 7 2017 Return: Wed Mar 8 2017 Trip spans 2 days
Alaska Airlines
Alaska Airlines
OAK
SEA
2h 00m
nonstop
SEA
OAK
2h 09m
nonstop
* Prices are per person and are for e–tickets and include all taxes & fees in USD.

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Here's why:

We’re not the seller.
At KAYAK we don’t set the prices, so it’s not possible for us to guarantee what other companies are selling.

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Our service lets you quickly and easily compare results from hundreds of travel sites at once. In this sense, KAYAK is a search engine and we can't guarantee prices we find.

Why aren’t prices accurate 100% of the time?
Prices on airline seats, hotel rooms and car rentals can change frequently. Several people may also be trying to buy the same travel option simultaneously. As a result, you may find, on occasion, that certain prices are no longer available.

If you have more questions or if you have a bad price to report to us,
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Airports
Origin

San Francisco
$97
Sacramento
$97
Long Beach
$97
Phoenix
$67
Los Angeles
$87
Denver
$49
Oakland
$97
San Jose
$97
Destination

Seattle
$49
Airlines Airline reviews

753 travelers who booked a flight from Denver to Seattle rated their chosen airlines with an average of 6.4.

Overall
6.5
Boarding
6.9
Crew
7.2
Comfort
6.2
Food
5.2
Entertainment
5.4