Cheap flights to King County

View €59 flight on Sat, 28 Feb 2026Opens in a new window

Popular airlines to King County

  • Alaska Airlines

  • Delta

  • American Airlines

  • United

  • Southwest Airlines

  • Frontier Airlines

  • Air Canada

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Cheap round-trip flights to King County

Prices were available within the past 7 days and start at €59 for one-way flights and €126 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Sat, 25 Apr - Sun, 26 Apr
LAX
Los Angeles
SEA
Seattle
€126 Return, found 1 day ago
€126
Return
found 1 day ago
Select Delta flight, departing Sat, 25 Apr from Los Angeles to Seattle, returning Sun, 26 Apr, priced at €126 found 1 day ago
Delta
Sat, 25 Apr - Mon, 27 Apr
SFO
San Francisco
SEA
Seattle
€130 Return, found 1 day ago
€130
Return
found 1 day ago
Select Delta flight, departing Sat, 25 Apr from San Francisco to Seattle, returning Mon, 27 Apr, priced at €130 found 1 day ago
Delta
Sat, 28 Feb - Sun, 1 Mar
SMF
Sacramento
SEA
Seattle
€134 Return, found 3 days ago
€134
Return
found 3 days ago
Select Delta flight, departing Sat, 28 Feb from Sacramento to Seattle, returning Sun, 1 Mar, priced at €134 found 3 days ago
Delta
Sat, 25 Apr - Sun, 26 Apr
LAX
Los Angeles
SEA
Seattle
€151 Return, found 1 day ago
€151
Return
found 1 day ago
Select Delta flight, departing Sat, 25 Apr from Los Angeles to Seattle, returning Sun, 26 Apr, priced at €151 found 1 day ago
Delta
Sat, 25 Apr - Sun, 26 Apr
LAX
Los Angeles
SEA
Seattle
€159 Return, found 1 day ago
€159
Return
found 1 day ago
Select Delta flight, departing Sat, 25 Apr from Los Angeles to Seattle, returning Sun, 26 Apr, priced at €159 found 1 day ago
United
Sat, 25 Apr - Mon, 27 Apr
SFO
San Francisco
SEA
Seattle
€160 Return, found 1 day ago
€160
Return
found 1 day ago
Select United flight, departing Sat, 25 Apr from San Francisco to Seattle, returning Mon, 27 Apr, priced at €160 found 1 day ago
United
Fri, 6 Mar - Sun, 8 Mar
SFO
San Francisco
SEA
Seattle
€163 Return, found 5 days ago
€163
Return
found 5 days ago
Select United flight, departing Fri, 6 Mar from San Francisco to Seattle, returning Sun, 8 Mar, priced at €163 found 5 days ago
American Airlines
Sat, 28 Feb - Sat, 7 Mar
DFW
Dallas
SEA
Seattle
€166 Return, found 2 days ago
€166
Return
found 2 days ago
Select American Airlines flight, departing Sat, 28 Feb from Dallas to Seattle, returning Sat, 7 Mar, priced at €166 found 2 days ago
Alaska Airlines
Sat, 7 Mar - Sun, 8 Mar
SFO
San Francisco
PAE
Seattle
€223 Return, found 1 day ago
€223
Return
found 1 day ago
Select Alaska Airlines flight, departing Sat, 7 Mar from San Francisco to Seattle, returning Sun, 8 Mar, priced at €223 found 1 day ago
JetBlue Airways
Fri, 25 Sept - Sat, 26 Sept
JFK
New York
SEA
Seattle
€311 Return, found 4 days ago
€311
Return
found 4 days ago
Select JetBlue Airways flight, departing Fri, 25 Sept from New York to Seattle, returning Sat, 26 Sept, priced at €311 found 4 days ago

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.

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 €126.
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 €126 and €396. Many lucky travellers nabbed one-way tickets from Sacramento (SMF) for only €59.
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 €126 to €396.
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.

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
Wed, 22 Apr - Sun, 26 Apr
DUB
Dublin
SEA
Seattle
€396 Return, found 6 days ago
€396
Return
found 6 days ago
Select Icelandair flight, departing Wed, 22 Apr from Dublin to Seattle, returning Sun, 26 Apr, priced at €396 found 6 days ago
*Available to Expedia members.