A cityscape with a prominent tower, a body of water, and a distant mountain.

Flight Destinations in King County

View ฿2,595 flight on Tue, 13 Oct 2026Opens in a new window

Flight 1

Flight 2

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 40% 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 ฿2,595 for one-way flights and ฿5,185 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Tue, 13 Oct - Wed, 14 Oct
SFO
San Francisco
SEA
Seattle
฿5,185 Return, found 1 day ago
฿5,185
Return
found 1 day ago
Select Delta flight, departing Tue, 13 Oct from San Francisco to Seattle, returning Wed, 14 Oct, priced at ฿5,185 found 1 day ago
United
Tue, 13 Oct - Wed, 14 Oct
SFO
San Francisco
SEA
Seattle
฿7,820 Return, found 1 day ago
฿7,820
Return
found 1 day ago
Select United flight, departing Tue, 13 Oct from San Francisco to Seattle, returning Wed, 14 Oct, priced at ฿7,820 found 1 day ago
American Airlines
Tue, 13 Oct - Wed, 14 Oct
SFO
San Francisco
PAE
Seattle
฿9,140 Return, found 1 day ago
฿9,140
Return
found 1 day ago
Select American Airlines flight, departing Tue, 13 Oct from San Francisco to Seattle, returning Wed, 14 Oct, priced at ฿9,140 found 1 day ago
American Airlines
Tue, 13 Oct - Wed, 14 Oct
SFO
San Francisco
SEA
Seattle
฿9,465 Return, found 1 day ago
฿9,465
Return
found 1 day ago
Select American Airlines flight, departing Tue, 13 Oct from San Francisco to Seattle, returning Wed, 14 Oct, priced at ฿9,465 found 1 day ago
United
Fri, 23 Oct - Wed, 28 Oct
TPE
Taipei
SEA
Seattle
฿22,360 Return, found 9 hours ago
฿22,360
Return
found 9 hours ago
Select United flight, departing Fri, 23 Oct from Taipei to Seattle, returning Wed, 28 Oct, priced at ฿22,360 found 9 hours ago
Korean Air
Fri, 6 Nov - Wed, 18 Nov
CNX
Chiang Mai
SEA
Seattle
฿26,301 Return, found 1 day ago
฿26,301
Return
found 1 day ago
Select Korean Air flight, departing Fri, 6 Nov from Chiang Mai to Seattle, returning Wed, 18 Nov, priced at ฿26,301 found 1 day ago
Korean Air
Thu, 19 Nov - Tue, 24 Nov
BKK
Bangkok
SEA
Seattle
฿26,301 Return, found 1 day ago
฿26,301
Return
found 1 day ago
Select Korean Air flight, departing Thu, 19 Nov from Bangkok to Seattle, returning Tue, 24 Nov, priced at ฿26,301 found 1 day ago
Asiana Airlines
Sun, 11 Apr - Sun, 18 Apr
BKK
Bangkok
SEA
Seattle
฿26,915 Return, found 1 day ago
฿26,915
Return
found 1 day ago
Select Asiana Airlines flight, departing Sun, 11 Apr from Bangkok to Seattle, returning Sun, 18 Apr, priced at ฿26,915 found 1 day ago
All Nippon Airways
Mon, 28 Sept - Mon, 5 Oct
BKK
Bangkok
SEA
Seattle
฿28,400 Return, found 5 hours ago
฿28,400
Return
found 5 hours ago
Select All Nippon Airways flight, departing Mon, 28 Sept from Bangkok to Seattle, returning Mon, 5 Oct, priced at ฿28,400 found 5 hours ago
Air Canada
Wed, 14 Oct - Wed, 21 Oct
BKK
Bangkok
SEA
Seattle
฿28,745 Return, found 1 day ago
฿28,745
Return
found 1 day ago
Select Air Canada flight, departing Wed, 14 Oct from Bangkok to Seattle, returning Wed, 21 Oct, priced at ฿28,745 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.

Korean Air
Mon, 6 Jul - Tue, 21 Jul
HKT
Phuket
SEA
Seattle
฿24,110 Return, found 6 days ago
฿24,110
Return
found 6 days ago
Select Korean Air flight, departing Mon, 6 Jul from Phuket to Seattle, returning Tue, 21 Jul, priced at ฿24,110 found 6 days 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 ฿5,185.
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 ฿5,185 and ฿28,745. Many lucky travellers nabbed one-way tickets from San Francisco (SFO) for only ฿2,595.
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 ฿5,185 to ฿28,745.
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
*Available to Expedia members.