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Cheap Flights to King County | Popular Routes to King County from HK$585

View HK$585 flight on Wed, 14 Oct 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 HK$585 for one-way flights and HK$1,319 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Tue, 15 Sept - Tue, 22 Sept
SFO
San Francisco
SEA
Seattle
HK$1,319 Return, found 1 hour ago
HK$1,319
Return
found 1 hour ago
Select Delta flight, departing Tue, 15 Sept from San Francisco to Seattle, returning Tue, 22 Sept, priced at HK$1,319 found 1 hour ago
Alaska Airlines
Mon, 14 Sept - Sat, 3 Oct
SFO
San Francisco
PAE
Seattle
HK$1,319 Return, found 20 hours ago
HK$1,319
Return
found 20 hours ago
Select Alaska Airlines flight, departing Mon, 14 Sept from San Francisco to Seattle, returning Sat, 3 Oct, priced at HK$1,319 found 20 hours ago
United
Fri, 16 Oct - Wed, 21 Oct
SFO
San Francisco
SEA
Seattle
HK$1,782 Return, found 3 days ago
HK$1,782
Return
found 3 days ago
Select United flight, departing Fri, 16 Oct from San Francisco to Seattle, returning Wed, 21 Oct, priced at HK$1,782 found 3 days ago
American Airlines
Tue, 15 Sept - Tue, 22 Sept
SFO
San Francisco
SEA
Seattle
HK$2,099 Return, found 1 hour ago
HK$2,099
Return
found 1 hour ago
Select American Airlines flight, departing Tue, 15 Sept from San Francisco to Seattle, returning Tue, 22 Sept, priced at HK$2,099 found 1 hour ago
American Airlines
Sat, 19 Sept - Tue, 22 Sept
STS
Santa Rosa
SEA
Seattle
HK$3,389 Return, found 18 hours ago
HK$3,389
Return
found 18 hours ago
Select American Airlines flight, departing Sat, 19 Sept from Santa Rosa to Seattle, returning Tue, 22 Sept, priced at HK$3,389 found 18 hours ago
Cathay Pacific
Mon, 26 Oct - Sun, 15 Nov
HKG
Hong Kong SAR
SEA
Seattle
HK$4,086 Return, found 1 day ago
HK$4,086
Return
found 1 day ago
Select Cathay Pacific flight, departing Mon, 26 Oct from Hong Kong SAR to Seattle, returning Sun, 15 Nov, priced at HK$4,086 found 1 day ago
Air Canada
Tue, 6 Oct - Mon, 26 Oct
HKG
Hong Kong SAR
SEA
Seattle
HK$4,163 Return, found 1 day ago
HK$4,163
Return
found 1 day ago
Select Air Canada flight, departing Tue, 6 Oct from Hong Kong SAR to Seattle, returning Mon, 26 Oct, priced at HK$4,163 found 1 day ago
Korean Air
Tue, 6 Oct - Mon, 26 Oct
HKG
Hong Kong SAR
SEA
Seattle
HK$5,669 Return, found 1 day ago
HK$5,669
Return
found 1 day ago
Select Korean Air flight, departing Tue, 6 Oct from Hong Kong SAR to Seattle, returning Mon, 26 Oct, priced at HK$5,669 found 1 day ago
STARLUX Airlines
Sat, 17 Oct - Sun, 25 Oct
HKG
Hong Kong SAR
SEA
Seattle
HK$6,113 Return, found 1 hour ago
HK$6,113
Return
found 1 hour ago
Select STARLUX Airlines flight, departing Sat, 17 Oct from Hong Kong SAR to Seattle, returning Sun, 25 Oct, priced at HK$6,113 found 1 hour ago
Philippine Airlines
Thu, 19 Nov - Thu, 26 Nov
HKG
Hong Kong SAR
SEA
Seattle
HK$6,369 Return, found 3 days ago
HK$6,369
Return
found 3 days ago
Select Philippine Airlines flight, departing Thu, 19 Nov from Hong Kong SAR to Seattle, returning Thu, 26 Nov, priced at HK$6,369 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.

Cathay Pacific
Mon, 26 Oct - Sun, 15 Nov
HKG
Hong Kong SAR
SEA
Seattle
HK$4,086 Return, found 1 day ago
HK$4,086
Return
found 1 day ago
Select Cathay Pacific flight, departing Mon, 26 Oct from Hong Kong SAR to Seattle, returning Sun, 15 Nov, priced at HK$4,086 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 HK$1,319.
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$1,319 and HK$6,369. Many lucky travellers nabbed one-way tickets from San Francisco (SFO) for only HK$585.
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$1,319 to HK$6,369.
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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