Cheap flights to King County

View €94 flight on Sat, 25 Apr 2026Opens in a new window

Popular airlines to King County

  • Alaska Airlines

  • Delta

  • American Airlines

  • United

  • Southwest Airlines

  • Frontier Airlines

  • JetBlue Airways

  • Be in the know

    Get alerts if flight prices drop or rise*

  • Book smarter

    Save up to 15% on select hotels after you book a flight*

  • Earn twice

    Earn your airline miles on top of our rewards
    Sign in

Cheap round-trip flights to King County

Prices were available within the past 7 days and start at €94 for one-way flights and €163 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Sat, 9 May - Sun, 10 May
LAX
Los Angeles
SEA
Seattle
€163 Return, found 3 days ago
€163
Return
found 3 days ago
Select Delta flight, departing Sat, 9 May from Los Angeles to Seattle, returning Sun, 10 May, priced at €163 found 3 days ago
American Airlines
Thu, 30 Apr - Sun, 3 May
LAX
Los Angeles
SEA
Seattle
€188 Return, found 6 hours ago
€188
Return
found 6 hours ago
Select American Airlines flight, departing Thu, 30 Apr from Los Angeles to Seattle, returning Sun, 3 May, priced at €188 found 6 hours ago
United
Sat, 25 Apr - Sun, 26 Apr
LAX
Los Angeles
SEA
Seattle
€231 Return, found 23 hours ago
€231
Return
found 23 hours ago
Select United flight, departing Sat, 25 Apr from Los Angeles to Seattle, returning Sun, 26 Apr, priced at €231 found 23 hours ago
American Airlines
Sat, 9 May - Sun, 10 May
LAX
Los Angeles
PAE
Seattle
€231 Return, found 3 days ago
€231
Return
found 3 days ago
Select American Airlines flight, departing Sat, 9 May from Los Angeles to Seattle, returning Sun, 10 May, priced at €231 found 3 days ago
Delta
Sat, 25 Apr - Sat, 2 May
ATL
Atlanta
SEA
Seattle
€257 Return, found 13 hours ago
€257
Return
found 13 hours ago
Select Delta flight, departing Sat, 25 Apr from Atlanta to Seattle, returning Sat, 2 May, priced at €257 found 13 hours ago
Alaska Airlines
Sun, 31 May - Sat, 13 Jun
ATL
Atlanta
SEA
Seattle
€441 Return, found 1 day ago
€441
Return
found 1 day ago
Select Alaska Airlines flight, departing Sun, 31 May from Atlanta to Seattle, returning Sat, 13 Jun, priced at €441 found 1 day ago
Icelandair
Wed, 8 Apr - Wed, 15 Apr
BER
Berlin
SEA
Seattle
€461 Return, found 4 days ago
€461
Return
found 4 days ago
Select Icelandair flight, departing Wed, 8 Apr from Berlin to Seattle, returning Wed, 15 Apr, priced at €461 found 4 days ago
Aer Lingus
Wed, 19 Aug - Mon, 31 Aug
BER
Berlin
SEA
Seattle
€470 Return, just found
€470
Return
just found
Select Aer Lingus flight, departing Wed, 19 Aug from Berlin to Seattle, returning Mon, 31 Aug, priced at €470 just found
Icelandair
Thu, 16 Apr - Mon, 20 Apr
DUB
Dublin
SEA
Seattle
€470 Return, found 1 day ago
€470
Return
found 1 day ago
Select Icelandair flight, departing Thu, 16 Apr from Dublin to Seattle, returning Mon, 20 Apr, priced at €470 found 1 day ago
Scandinavian Airlines
Thu, 21 May - Fri, 4 Sept
DUB
Dublin
SEA
Seattle
€508 Return, found 3 days ago
€508
Return
found 3 days ago
Select Scandinavian Airlines flight, departing Thu, 21 May from Dublin to Seattle, returning Fri, 4 Sept, priced at €508 found 3 days ago

Trending flights to King County

These prices were available within the past 7 days. Prices quoted are per person, return, for the period specified. Prices and availability are subject to change. Additional terms apply.

Icelandair
Thu, 16 Apr - Mon, 20 Apr
DUB
Dublin
SEA
Seattle
€470 Return, found 1 day ago
€470
Return
found 1 day ago
Select Icelandair flight, departing Thu, 16 Apr from Dublin to Seattle, returning Mon, 20 Apr, priced at €470 found 1 day ago

Frequently asked questions

How do I find cheap flights to King County that have flexible change policies?
We know that things can change in the blink of an eye, so locking in a flexible ticket with Expedia is always a clever idea. Tick the "No change fee" box underneath the "Flexible change policies" filter. Your low-cost, flexible flight to King County is only a few clicks away.
Which airlines fly to King County?
When you're ready to book your ticket to or near King County, these carriers look forward to welcoming you on board:

  • Alaska Airlines - 8,781 flights to or near King County each month, including 8,781 flights to Seattle - Tacoma Intl. Airport (SEA) per month.
  • Delta Air Lines - 4,186 flights to or near King County each month, including 4,186 flights to Seattle - Tacoma Intl. Airport (SEA) per month.
  • United Airlines - 828 flights to or near King County each month, including 828 flights to Seattle - Tacoma Intl. Airport (SEA) per month.

How can I find cheap tickets to King County?
Book in advance, fly in or out of nearby airports, avoid peak travel periods — there are plenty of ways! One more is to take advantage of Expedia's "flexible dates" feature. Search for your King County flight, then compare the prices for nearby dates. In the last seven days, the best price for a flight to King County was €163.
How much is a flight to King County?
There were plenty of affordable fares for the taking in the last seven days, with the price of a return flight to King County ranging between €163 and €508. Many lucky travellers nabbed one-way tickets from Los Angeles (LAX) for only €94.
What are the most popular airports to fly into in King County?
Depending on which carrier you travel with and departure city, one of these leading airports will be your entry point to King County:

  • Seattle - Tacoma Intl. Airport (SEA) - 15,456 flights per month.
  • Boeing Field Airport (BFI) - 247 flights per month.

How much is a plane ticket to King County?
In the last seven days, plane fares to King County varied from €163 to €508.
What is the best time to go to King County?
A terrific time to check out Seattle is after June 20 when summer starts. In King County's most populated city, temperatures range from 13ºC to 24ºC during this time — glorious weather for touring around! March, April and May are the most popular months for tourists.
What months are the cheapest to book a flight to King County?
February is the cheapest month to reserve a seat for your King County adventure. Airfares cost the most over the festive month of December, so steer clear of this time if possible.

Book with confidence

About King County

Expedia offers flights to King County to meet every traveller's needs. Whatever your flight need - Expedia has the flight for you. So choose from flights to King County or destinations around the world and discover how easy it is to make your flight reservations on Expedia.
About King County

Explore a world of travel with Expedia

*Available to Expedia members.