Cheap flights to King County

View €93 flight on Fri, 22 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 €93 for one-way flights and €183 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Air Canada
Fri, 22 May - Mon, 25 May
YVR
Vancouver
SEA
Seattle
€183 Return, found 7 hours ago
€183
Return
found 7 hours ago
Select Air Canada flight, departing Fri, 22 May from Vancouver to Seattle, returning Mon, 25 May, priced at €183 found 7 hours ago
Harbour Air Seaplanes
Fri, 22 May - Mon, 25 May
CXH
Vancouver
LKE
Seattle
€186 Return, found 7 hours ago
€186
Return
found 7 hours ago
Select Harbour Air Seaplanes flight, departing Fri, 22 May from Vancouver to Seattle, returning Mon, 25 May, priced at €186 found 7 hours ago
Delta
Mon, 6 Apr - Sat, 18 Apr
YVR
Vancouver
SEA
Seattle
€210 Return, found 4 days ago
€210
Return
found 4 days ago
Select Delta flight, departing Mon, 6 Apr from Vancouver to Seattle, returning Sat, 18 Apr, priced at €210 found 4 days ago
WestJet
Wed, 12 Aug - Sat, 22 Aug
YVR
Vancouver
SEA
Seattle
€244 Return, found 13 hours ago
€244
Return
found 13 hours ago
Select WestJet flight, departing Wed, 12 Aug from Vancouver to Seattle, returning Sat, 22 Aug, priced at €244 found 13 hours ago
Delta
Sat, 2 May - Sat, 9 May
BOS
Boston
SEA
Seattle
€257 Return, found 4 hours ago
€257
Return
found 4 hours ago
Select Delta flight, departing Sat, 2 May from Boston to Seattle, returning Sat, 9 May, priced at €257 found 4 hours ago
American Airlines
Sat, 2 May - Sat, 9 May
BOS
Boston
SEA
Seattle
€274 Return, found 4 hours ago
€274
Return
found 4 hours ago
Select American Airlines flight, departing Sat, 2 May from Boston to Seattle, returning Sat, 9 May, priced at €274 found 4 hours ago
JetBlue Airways
Sun, 17 May - Wed, 20 May
BOS
Boston
SEA
Seattle
€287 Return, found 14 hours ago
€287
Return
found 14 hours ago
Select JetBlue Airways flight, departing Sun, 17 May from Boston to Seattle, returning Wed, 20 May, priced at €287 found 14 hours ago
United
Fri, 22 May - Mon, 25 May
YVR
Vancouver
SEA
Seattle
€298 Return, found 7 hours ago
€298
Return
found 7 hours ago
Select United flight, departing Fri, 22 May from Vancouver to Seattle, returning Mon, 25 May, priced at €298 found 7 hours ago
WestJet
Sat, 15 Aug - Mon, 17 Aug
YXX
Abbotsford
SEA
Seattle
€405 Return, found 12 hours ago
€405
Return
found 12 hours ago
Select WestJet flight, departing Sat, 15 Aug from Abbotsford to Seattle, returning Mon, 17 Aug, priced at €405 found 12 hours ago
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

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 €183.
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 €183 and €470. Many lucky travellers nabbed one-way tickets from Vancouver (CXH) for only €93.
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 €183 to €470.
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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