Cheap Flights to King County | Popular Routes to King County from HK$617

View HK$617 flight on Wed, 1 Apr 2026Opens in a new window

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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 HK$617 for one-way flights and HK$1,189 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Alaska Airlines
Wed, 15 Apr - Wed, 15 Apr
SFO
San Francisco
SEA
Seattle
HK$1,189 Return, found 2 days ago
HK$1,189
Return
found 2 days ago
Select Alaska Airlines flight, departing Wed, 15 Apr from San Francisco to Seattle, returning Wed, 15 Apr, priced at HK$1,189 found 2 days ago
Delta
Tue, 14 Apr - Sat, 18 Apr
SFO
San Francisco
SEA
Seattle
HK$1,233 Return, found 2 days ago
HK$1,233
Return
found 2 days ago
Select Delta flight, departing Tue, 14 Apr from San Francisco to Seattle, returning Sat, 18 Apr, priced at HK$1,233 found 2 days ago
United
Tue, 7 Apr - Thu, 9 Apr
SFO
San Francisco
SEA
Seattle
HK$1,835 Return, found 2 days ago
HK$1,835
Return
found 2 days ago
Select United flight, departing Tue, 7 Apr from San Francisco to Seattle, returning Thu, 9 Apr, priced at HK$1,835 found 2 days ago
American Airlines
Tue, 24 Mar - Thu, 26 Mar
SFO
San Francisco
SEA
Seattle
HK$1,835 Return, found 2 days ago
HK$1,835
Return
found 2 days ago
Select American Airlines flight, departing Tue, 24 Mar from San Francisco to Seattle, returning Thu, 26 Mar, priced at HK$1,835 found 2 days ago
American Airlines
Tue, 28 Apr - Thu, 30 Apr
SFO
San Francisco
PAE
Seattle
HK$1,911 Return, found 4 days ago
HK$1,911
Return
found 4 days ago
Select American Airlines flight, departing Tue, 28 Apr from San Francisco to Seattle, returning Thu, 30 Apr, priced at HK$1,911 found 4 days ago
Delta
Fri, 26 Jun - Tue, 30 Jun
HKG
Hong Kong SAR
SEA
Seattle
HK$4,316 Return, found 6 days ago
HK$4,316
Return
found 6 days ago
Select Delta flight, departing Fri, 26 Jun from Hong Kong SAR to Seattle, returning Tue, 30 Jun, priced at HK$4,316 found 6 days ago
Philippine Airlines
Wed, 17 Jun - Fri, 26 Jun
HKG
Hong Kong SAR
SEA
Seattle
HK$4,595 Return, found 6 days ago
HK$4,595
Return
found 6 days ago
Select Philippine Airlines flight, departing Wed, 17 Jun from Hong Kong SAR to Seattle, returning Fri, 26 Jun, priced at HK$4,595 found 6 days ago
Air Canada
Wed, 24 Jun - Thu, 9 Jul
HKG
Hong Kong SAR
SEA
Seattle
HK$4,702 Return, found 2 days ago
HK$4,702
Return
found 2 days ago
Select Air Canada flight, departing Wed, 24 Jun from Hong Kong SAR to Seattle, returning Thu, 9 Jul, priced at HK$4,702 found 2 days ago
Asiana Airlines
Thu, 14 May - Mon, 18 May
HKG
Hong Kong SAR
SEA
Seattle
HK$5,100 Return, found 4 days ago
HK$5,100
Return
found 4 days ago
Select Asiana Airlines flight, departing Thu, 14 May from Hong Kong SAR to Seattle, returning Mon, 18 May, priced at HK$5,100 found 4 days ago
China Airlines
Sun, 21 Jun - Tue, 28 Jul
HKG
Hong Kong SAR
SEA
Seattle
HK$5,122 Return, just found
HK$5,122
Return
just found
Select China Airlines flight, departing Sun, 21 Jun from Hong Kong SAR to Seattle, returning Tue, 28 Jul, priced at HK$5,122 just found

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
Fri, 26 Jun - Tue, 30 Jun
HKG
Hong Kong SAR
SEA
Seattle
HK$4,316 Return, found 6 days ago
HK$4,316
Return
found 6 days ago
Select Delta flight, departing Fri, 26 Jun from Hong Kong SAR to Seattle, returning Tue, 30 Jun, priced at HK$4,316 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 HK$1,189.
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$1,189 and HK$5,122. Many lucky travellers nabbed one-way tickets from San Francisco (SFO) for only HK$617.
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$1,189 to HK$5,122.
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

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About King County

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