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

View HK$617 flight on Tue, 7 Apr 2026Opens in a new window

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$922 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Thu, 12 Mar - Sat, 14 Mar
LAX
Los Angeles
SEA
Seattle
HK$922 Return, found 3 days ago
HK$922
Return
found 3 days ago
Select Delta flight, departing Thu, 12 Mar from Los Angeles to Seattle, returning Sat, 14 Mar, priced at HK$922 found 3 days ago
Alaska Airlines
Wed, 15 Apr - Wed, 15 Apr
SFO
San Francisco
SEA
Seattle
HK$1,189 Return, found 15 hours ago
HK$1,189
Return
found 15 hours ago
Select Alaska Airlines flight, departing Wed, 15 Apr from San Francisco to Seattle, returning Wed, 15 Apr, priced at HK$1,189 found 15 hours ago
United
Thu, 16 Apr - Sat, 25 Apr
LAX
Los Angeles
SEA
Seattle
HK$1,470 Return, found 3 days ago
HK$1,470
Return
found 3 days ago
Select United flight, departing Thu, 16 Apr from Los Angeles to Seattle, returning Sat, 25 Apr, priced at HK$1,470 found 3 days ago
American Airlines
Wed, 18 Mar - Wed, 25 Mar
LAX
Los Angeles
SEA
Seattle
HK$1,620 Return, found 5 days ago
HK$1,620
Return
found 5 days ago
Select American Airlines flight, departing Wed, 18 Mar from Los Angeles to Seattle, returning Wed, 25 Mar, priced at HK$1,620 found 5 days ago
Alaska Airlines
Mon, 23 Mar - Mon, 30 Mar
SFO
San Francisco
PAE
Seattle
HK$1,803 Return, found 6 days ago
HK$1,803
Return
found 6 days ago
Select Alaska Airlines flight, departing Mon, 23 Mar from San Francisco to Seattle, returning Mon, 30 Mar, priced at HK$1,803 found 6 days ago
American Airlines
Thu, 12 Mar - Sat, 14 Mar
LAX
Los Angeles
PAE
Seattle
HK$1,857 Return, found 3 days ago
HK$1,857
Return
found 3 days ago
Select American Airlines flight, departing Thu, 12 Mar from Los Angeles to Seattle, returning Sat, 14 Mar, priced at HK$1,857 found 3 days ago
Delta
Fri, 26 Jun - Tue, 30 Jun
HKG
Hong Kong SAR
SEA
Seattle
HK$4,316 Return, found 4 days ago
HK$4,316
Return
found 4 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 4 days ago
Philippine Airlines
Wed, 17 Jun - Fri, 26 Jun
HKG
Hong Kong SAR
SEA
Seattle
HK$4,595 Return, found 4 days ago
HK$4,595
Return
found 4 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 4 days ago
Air Canada
Wed, 24 Jun - Thu, 9 Jul
HKG
Hong Kong SAR
SEA
Seattle
HK$4,702 Return, found 1 day ago
HK$4,702
Return
found 1 day 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 1 day ago
Asiana Airlines
Thu, 14 May - Mon, 18 May
HKG
Hong Kong SAR
SEA
Seattle
HK$5,100 Return, found 3 days ago
HK$5,100
Return
found 3 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 3 days ago

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.

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$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$922 and HK$5,100. 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$922 to HK$5,100.
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.

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 4 days ago
HK$4,316
Return
found 4 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 4 days ago
*Available to Expedia members.