Cheap flights from Los Angeles to Northwest Washington

View AU$121 flight on Sat, 20 Sep. 2025Opens in a new window

Popular airlines from Los Angeles to Northwest Washington

  • American Airlines

    American Airlines

  • Alaska Airlines

    Alaska Airlines

  • Plan, book, fly with confidence

  • trending down icon

    Be in the know

    Get alerts if flight prices drop or rise*
  • bex rewards loyalty icon

    Book smarter

    Save up to 35% on select hotels after you book a flight*
  • payments icon

    Earn twice

    Earn your airline miles on top of our rewards
    Sign in

Cheap Flights from Los Angeles (QLA) to Northwest Washington (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
Wed, 20 Aug. - Wed, 27 Aug.
ONT
Ontario
SEA
Seattle
AU$210 Return, found 1 day ago
AU$210
Return
found 1 day ago
Select Alaska Airlines flight, departing Wed, 20 Aug. from Ontario to Seattle, returning Wed, 27 Aug., priced at AU$210 found 1 day ago
Delta
Wed, 20 Aug. - Wed, 27 Aug.
ONT
Ontario
SEA
Seattle
AU$211 Return, found 1 day ago
AU$211
Return
found 1 day ago
Select Delta flight, departing Wed, 20 Aug. from Ontario to Seattle, returning Wed, 27 Aug., priced at AU$211 found 1 day ago
Hawaiian Airlines
Wed, 13 Aug. - Tue, 19 Aug.
BUR
Burbank
SEA
Seattle
AU$211 Return, found 2 days ago
AU$211
Return
found 2 days ago
Select Hawaiian Airlines flight, departing Wed, 13 Aug. from Burbank to Seattle, returning Tue, 19 Aug., priced at AU$211 found 2 days ago
Hawaiian Airlines
Sat, 13 Sep. - Tue, 30 Sep.
ONT
Ontario
SEA
Seattle
AU$211 Return, found 2 days ago
AU$211
Return
found 2 days ago
Select Hawaiian Airlines flight, departing Sat, 13 Sep. from Ontario to Seattle, returning Tue, 30 Sep., priced at AU$211 found 2 days ago
American Airlines
Sat, 4 Oct. - Sat, 11 Oct.
LAX
Los Angeles
SEA
Seattle
AU$240 Return, just found
AU$240
Return
just found
Select American Airlines flight, departing Sat, 4 Oct. from Los Angeles to Seattle, returning Sat, 11 Oct., priced at AU$240 just found
United
Tue, 7 Oct. - Tue, 14 Oct.
LAX
Los Angeles
SEA
Seattle
AU$333 Return, found 23 hours ago
AU$333
Return
found 23 hours ago
Select United flight, departing Tue, 7 Oct. from Los Angeles to Seattle, returning Tue, 14 Oct., priced at AU$333 found 23 hours ago
*Available to Expedia members.