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

Flight Destinations in King County

View ฿3,061 flight on Wed, 23 Sept 2026Opens in a new window

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 ฿3,061 for one-way flights and ฿6,122 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Harbour Air Seaplanes
Wed, 23 Sept - Wed, 30 Sept
CXH
Vancouver
LKE
Seattle
฿6,122 Return, found 8 hours ago
฿6,122
Return
found 8 hours ago
Select Harbour Air Seaplanes flight, departing Wed, 23 Sept from Vancouver to Seattle, returning Wed, 30 Sept, priced at ฿6,122 found 8 hours ago
Harbour Air Seaplanes
Mon, 14 Sept - Wed, 23 Sept
CXH
Vancouver
LKE
Seattle
฿6,155 Return, found 3 days ago
฿6,155
Return
found 3 days ago
Select Harbour Air Seaplanes flight, departing Mon, 14 Sept from Vancouver to Seattle, returning Wed, 23 Sept, priced at ฿6,155 found 3 days ago
Harbour Air Seaplanes
Fri, 4 Sept - Tue, 8 Sept
CXH
Vancouver
LKE
Seattle
฿6,618 Return, found 6 days ago
฿6,618
Return
found 6 days ago
Select Harbour Air Seaplanes flight, departing Fri, 4 Sept from Vancouver to Seattle, returning Tue, 8 Sept, priced at ฿6,618 found 6 days ago
Harbour Air Seaplanes
Mon, 14 Sept - Wed, 23 Sept
CXH
Vancouver
LKE
Seattle
฿7,414 Return, found 3 days ago
฿7,414
Return
found 3 days ago
Select Harbour Air Seaplanes flight, departing Mon, 14 Sept from Vancouver to Seattle, returning Wed, 23 Sept, priced at ฿7,414 found 3 days ago
Harbour Air Seaplanes
Fri, 18 Sept - Mon, 21 Sept
CXH
Vancouver
LKE
Seattle
฿7,447 Return, found 18 hours ago
฿7,447
Return
found 18 hours ago
Select Harbour Air Seaplanes flight, departing Fri, 18 Sept from Vancouver to Seattle, returning Mon, 21 Sept, priced at ฿7,447 found 18 hours ago
Harbour Air Seaplanes
Wed, 23 Sept - Wed, 30 Sept
CXH
Vancouver
LKE
Seattle
฿7,922 Return, found 8 hours ago
฿7,922
Return
found 8 hours ago
Select Harbour Air Seaplanes flight, departing Wed, 23 Sept from Vancouver to Seattle, returning Wed, 30 Sept, priced at ฿7,922 found 8 hours ago
Harbour Air Seaplanes
Mon, 10 Aug - Tue, 11 Aug
CXH
Vancouver
LKE
Seattle
฿8,441 Return, found 3 days ago
฿8,441
Return
found 3 days ago
Select Harbour Air Seaplanes flight, departing Mon, 10 Aug from Vancouver to Seattle, returning Tue, 11 Aug, priced at ฿8,441 found 3 days ago
Harbour Air Seaplanes
Fri, 18 Sept - Mon, 21 Sept
CXH
Vancouver
LKE
Seattle
฿8,699 Return, found 18 hours ago
฿8,699
Return
found 18 hours ago
Select Harbour Air Seaplanes flight, departing Fri, 18 Sept from Vancouver to Seattle, returning Mon, 21 Sept, priced at ฿8,699 found 18 hours ago
Harbour Air Seaplanes
Tue, 11 Aug - Wed, 12 Aug
CXH
Vancouver
LKE
Seattle
฿9,157 Return, found 3 days ago
฿9,157
Return
found 3 days ago
Select Harbour Air Seaplanes flight, departing Tue, 11 Aug from Vancouver to Seattle, returning Wed, 12 Aug, priced at ฿9,157 found 3 days ago
Harbour Air Seaplanes
Tue, 11 Aug - Wed, 12 Aug
CXH
Vancouver
LKE
Seattle
฿9,224 Return, found 3 days ago
฿9,224
Return
found 3 days ago
Select Harbour Air Seaplanes flight, departing Tue, 11 Aug from Vancouver to Seattle, returning Wed, 12 Aug, priced at ฿9,224 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.

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 ฿6,122.
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 ฿6,122 and ฿24,110. Many lucky travellers nabbed one-way tickets from Vancouver (CXH) for only ฿3,061.
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 ฿6,122 to ฿24,110.
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.