Cheap Flights to King County | Popular Routes to King County from HK$3,561

View HK$3,561 flight on Mon, 8 Jun 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 35% 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 HK$3,561 for one-way flights and HK$5,922 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

FlexFlight
Thu, 18 Jun - Thu, 2 Jul
ZYA
Amsterdam
SEA
Seattle
HK$5,922 Return, found 3 days ago
HK$5,922
Return
found 3 days ago
Select FlexFlight flight, departing Thu, 18 Jun from Amsterdam to Seattle, returning Thu, 2 Jul, priced at HK$5,922 found 3 days ago
Delta
Tue, 1 Sept - Sun, 13 Sept
HKG
Hong Kong SAR
SEA
Seattle
HK$5,989 Return, just found
HK$5,989
Return
just found
Select Delta flight, departing Tue, 1 Sept from Hong Kong SAR to Seattle, returning Sun, 13 Sept, priced at HK$5,989 just found
Condor
Thu, 18 Jun - Thu, 2 Jul
ZYA
Amsterdam
SEA
Seattle
HK$5,996 Return, found 3 days ago
HK$5,996
Return
found 3 days ago
Select Condor flight, departing Thu, 18 Jun from Amsterdam to Seattle, returning Thu, 2 Jul, priced at HK$5,996 found 3 days ago
Korean Air
Thu, 8 Oct - Thu, 22 Oct
HKG
Hong Kong SAR
SEA
Seattle
HK$6,074 Return, found 2 hours ago
HK$6,074
Return
found 2 hours ago
Select Korean Air flight, departing Thu, 8 Oct from Hong Kong SAR to Seattle, returning Thu, 22 Oct, priced at HK$6,074 found 2 hours ago
United
Wed, 17 Jun - Tue, 18 Aug
HKG
Hong Kong SAR
SEA
Seattle
HK$6,110 Return, found 2 hours ago
HK$6,110
Return
found 2 hours ago
Select United flight, departing Wed, 17 Jun from Hong Kong SAR to Seattle, returning Tue, 18 Aug, priced at HK$6,110 found 2 hours ago
Asiana Airlines
Fri, 16 Oct - Sat, 31 Oct
HKG
Hong Kong SAR
SEA
Seattle
HK$6,443 Return, found 7 hours ago
HK$6,443
Return
found 7 hours ago
Select Asiana Airlines flight, departing Fri, 16 Oct from Hong Kong SAR to Seattle, returning Sat, 31 Oct, priced at HK$6,443 found 7 hours ago
All Nippon Airways
Wed, 16 Dec - Mon, 4 Jan
PVG
Shanghai
SEA
Seattle
HK$6,791 Return, found 4 hours ago
HK$6,791
Return
found 4 hours ago
Select All Nippon Airways flight, departing Wed, 16 Dec from Shanghai to Seattle, returning Mon, 4 Jan, priced at HK$6,791 found 4 hours ago
Air Canada
Tue, 16 Jun - Mon, 13 Jul
HKG
Hong Kong SAR
SEA
Seattle
HK$6,886 Return, found 3 days ago
HK$6,886
Return
found 3 days ago
Select Air Canada flight, departing Tue, 16 Jun from Hong Kong SAR to Seattle, returning Mon, 13 Jul, priced at HK$6,886 found 3 days ago
Delta
Mon, 15 Jun - Mon, 29 Jun
PVG
Shanghai
SEA
Seattle
HK$6,893 Return, found 3 days ago
HK$6,893
Return
found 3 days ago
Select Delta flight, departing Mon, 15 Jun from Shanghai to Seattle, returning Mon, 29 Jun, priced at HK$6,893 found 3 days ago
Lufthansa
Mon, 15 Jun - Mon, 29 Jun
AMS
Amsterdam
SEA
Seattle
HK$7,064 Return, found 3 days ago
HK$7,064
Return
found 3 days ago
Select Lufthansa flight, departing Mon, 15 Jun from Amsterdam to Seattle, returning Mon, 29 Jun, priced at HK$7,064 found 3 days 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.

Delta
Tue, 1 Sept - Sun, 13 Sept
HKG
Hong Kong SAR
SEA
Seattle
HK$5,989 Return, just found
HK$5,989
Return
just found
Select Delta flight, departing Tue, 1 Sept from Hong Kong SAR to Seattle, returning Sun, 13 Sept, priced at HK$5,989 just found

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 HK$5,922.
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 HK$5,922 and HK$7,064. Many lucky travellers nabbed one-way tickets from Hong Kong SAR (HKG) for only HK$3,561.
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.

When is the cheapest time to fly to King County?
If you'd prefer to spend your money experiencing King County rather than on your flight there, depart early in the week. The most cost-effective day to travel is generally Tuesday, with Monday running a close second. With many folks traveling over the weekend, Saturday often has the highest fares.
How much is a plane ticket to King County?
In the last seven days, plane fares to King County varied from HK$5,922 to HK$7,064.
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

Explore a world of travel with Expedia

*Available to Expedia members.