Cheap flights to King County

View €151 flight on Sat, 30 May 2026Opens in a new window

Popular airlines to King County

  • Alaska Airlines

  • Delta

  • American Airlines

  • United

  • Southwest Airlines

  • Frontier Airlines

  • JetBlue Airways

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Cheap round-trip flights to King County

Prices were available within the past 7 days and start at €151 for one-way flights and €302 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Wed, 19 Aug - Sun, 23 Aug
ORD
Chicago
SEA
Seattle
€302 Return, found 1 hour ago
€302
Return
found 1 hour ago
Select Delta flight, departing Wed, 19 Aug from Chicago to Seattle, returning Sun, 23 Aug, priced at €302 found 1 hour ago
American Airlines
Fri, 5 Jun - Thu, 11 Jun
ORD
Chicago
SEA
Seattle
€311 Return, found 23 hours ago
€311
Return
found 23 hours ago
Select American Airlines flight, departing Fri, 5 Jun from Chicago to Seattle, returning Thu, 11 Jun, priced at €311 found 23 hours ago
United
Wed, 19 Aug - Sun, 23 Aug
ORD
Chicago
SEA
Seattle
€387 Return, found 1 hour ago
€387
Return
found 1 hour ago
Select United flight, departing Wed, 19 Aug from Chicago to Seattle, returning Sun, 23 Aug, priced at €387 found 1 hour ago
Condor
Thu, 21 May - Sat, 30 May
VCE
Venice
SEA
Seattle
€450 Return, found 2 days ago
€450
Return
found 2 days ago
Select Condor flight, departing Thu, 21 May from Venice to Seattle, returning Sat, 30 May, priced at €450 found 2 days ago
Finnair
Fri, 19 Jun - Thu, 25 Jun
DUB
Dublin
SEA
Seattle
€507 Return, found 1 day ago
€507
Return
found 1 day ago
Select Finnair flight, departing Fri, 19 Jun from Dublin to Seattle, returning Thu, 25 Jun, priced at €507 found 1 day ago
Aer Lingus
Fri, 29 May - Mon, 8 Jun
DUB
Dublin
SEA
Seattle
€525 Return, found 1 hour ago
€525
Return
found 1 hour ago
Select Aer Lingus flight, departing Fri, 29 May from Dublin to Seattle, returning Mon, 8 Jun, priced at €525 found 1 hour ago
Iberia
Tue, 1 Sept - Mon, 7 Sept
DUB
Dublin
SEA
Seattle
€529 Return, found 14 hours ago
€529
Return
found 14 hours ago
Select Iberia flight, departing Tue, 1 Sept from Dublin to Seattle, returning Mon, 7 Sept, priced at €529 found 14 hours ago
Scandinavian Airlines
Thu, 28 May - Sun, 7 Jun
DUB
Dublin
SEA
Seattle
€537 Return, found 4 days ago
€537
Return
found 4 days ago
Select Scandinavian Airlines flight, departing Thu, 28 May from Dublin to Seattle, returning Sun, 7 Jun, priced at €537 found 4 days ago
JetBlue Airways
Thu, 8 Oct - Wed, 14 Oct
DUB
Dublin
SEA
Seattle
€556 Return, found 23 hours ago
€556
Return
found 23 hours ago
Select JetBlue Airways flight, departing Thu, 8 Oct from Dublin to Seattle, returning Wed, 14 Oct, priced at €556 found 23 hours ago
British Airways
Thu, 18 Jun - Mon, 22 Jun
DUB
Dublin
SEA
Seattle
€648 Return, found 11 hours ago
€648
Return
found 11 hours ago
Select British Airways flight, departing Thu, 18 Jun from Dublin to Seattle, returning Mon, 22 Jun, priced at €648 found 11 hours 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.

Finnair
Fri, 19 Jun - Thu, 25 Jun
DUB
Dublin
SEA
Seattle
€507 Return, found 1 day ago
€507
Return
found 1 day ago
Select Finnair flight, departing Fri, 19 Jun from Dublin to Seattle, returning Thu, 25 Jun, priced at €507 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 €302.
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 €302 and €648. Many lucky travellers nabbed one-way tickets from Chicago (ORD) for only €151.
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 €302 to €648.
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
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