Flight Destinations in King County

View ฿2,490 flight on Thu, 12 Feb 2026Opens in a new window

Popular airlines to King County

  • Alaska Airlines

    Alaska Airlines

  • Delta

    Delta

  • American Airlines

    American Airlines

  • United

    United

  • Southwest Airlines

    Southwest Airlines

  • Frontier Airlines

    Frontier Airlines

  • Air Canada

    Air Canada

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Cheap round-trip flights to King County

Prices were available within the past 7 days and start at ฿2,490 for one-way flights and ฿2,080 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frontier Airlines
Thu, 22 Jan - Sun, 8 Feb
LAX
Los Angeles
SEA
Seattle
฿2,080 Return, found 1 day ago
฿2,080
Return
found 1 day ago
Select Frontier Airlines flight, departing Thu, 22 Jan from Los Angeles to Seattle, returning Sun, 8 Feb, priced at ฿2,080 found 1 day ago
Delta
Fri, 6 Feb - Sat, 21 Feb
ONT
Ontario
SEA
Seattle
฿4,355 Return, found 1 day ago
฿4,355
Return
found 1 day ago
Select Delta flight, departing Fri, 6 Feb from Ontario to Seattle, returning Sat, 21 Feb, priced at ฿4,355 found 1 day ago
Alaska Airlines
Mon, 9 Feb - Thu, 26 Feb
ONT
Ontario
SEA
Seattle
฿4,970 Return, found 1 day ago
฿4,970
Return
found 1 day ago
Select Alaska Airlines flight, departing Mon, 9 Feb from Ontario to Seattle, returning Thu, 26 Feb, priced at ฿4,970 found 1 day ago
United
Sat, 17 Jan - Sat, 31 Jan
LAX
Los Angeles
SEA
Seattle
฿6,515 Return, found 1 day ago
฿6,515
Return
found 1 day ago
Select United flight, departing Sat, 17 Jan from Los Angeles to Seattle, returning Sat, 31 Jan, priced at ฿6,515 found 1 day ago
American Airlines
Thu, 5 Mar - Wed, 11 Mar
LAX
Los Angeles
PAE
Seattle
฿7,105 Return, found 2 hours ago
฿7,105
Return
found 2 hours ago
Select American Airlines flight, departing Thu, 5 Mar from Los Angeles to Seattle, returning Wed, 11 Mar, priced at ฿7,105 found 2 hours ago
Hainan Airlines
Sat, 4 Apr - Sat, 18 Apr
BKK
Bangkok
SEA
Seattle
฿20,710 Return, found 2 hours ago
฿20,710
Return
found 2 hours ago
Select Hainan Airlines flight, departing Sat, 4 Apr from Bangkok to Seattle, returning Sat, 18 Apr, priced at ฿20,710 found 2 hours ago
Korean Air
Thu, 19 Feb - Mon, 23 Feb
MNL
Manila
SEA
Seattle
฿22,075 Return, found 18 hours ago
฿22,075
Return
found 18 hours ago
Select Korean Air flight, departing Thu, 19 Feb from Manila to Seattle, returning Mon, 23 Feb, priced at ฿22,075 found 18 hours ago
EVA Airways
Thu, 19 Feb - Sat, 28 Feb
MNL
Manila
SEA
Seattle
฿22,320 Return, found 18 hours ago
฿22,320
Return
found 18 hours ago
Select EVA Airways flight, departing Thu, 19 Feb from Manila to Seattle, returning Sat, 28 Feb, priced at ฿22,320 found 18 hours ago
Philippine Airlines
Mon, 9 Feb - Sun, 22 Feb
BKK
Bangkok
SEA
Seattle
฿22,415 Return, found 10 hours ago
฿22,415
Return
found 10 hours ago
Select Philippine Airlines flight, departing Mon, 9 Feb from Bangkok to Seattle, returning Sun, 22 Feb, priced at ฿22,415 found 10 hours ago
China Airlines
Mon, 23 Feb - Wed, 11 Mar
MNL
Manila
SEA
Seattle
฿22,990 Return, found 1 day ago
฿22,990
Return
found 1 day ago
Select China Airlines flight, departing Mon, 23 Feb from Manila to Seattle, returning Wed, 11 Mar, priced at ฿22,990 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.

Hainan Airlines
Sat, 4 Apr - Sat, 18 Apr
BKK
Bangkok
SEA
Seattle
฿20,710 Return, found 2 hours ago
฿20,710
Return
found 2 hours ago
Select Hainan Airlines flight, departing Sat, 4 Apr from Bangkok to Seattle, returning Sat, 18 Apr, priced at ฿20,710 found 2 hours 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 ฿2,080.
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 ฿2,080 and ฿22,990. Many lucky travellers nabbed one-way tickets from Ontario (ONT) for only ฿2,490.
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 ฿2,080 to ฿22,990.
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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