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

Cheap Flights to King County from ₩190,400

View ₩190,400 flight on Sat, Sep 12, 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

How much is the cheapest flight to King County?

Prices were available within the past 7 days and start at ₩190,400 for one-way flights and ₩291,800 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Wed, Sep 9 - Wed, Sep 16
LAX
Los Angeles
SEA
Seattle
₩291,800 Roundtrip, found 2 days ago
₩291,800
Roundtrip
found 2 days ago
Select Delta flight, departing Wed, Sep 9 from Los Angeles to Seattle, returning Wed, Sep 16, priced at ₩291,800 found 2 days ago
Alaska Airlines
Tue, Nov 3 - Tue, Nov 3
LAX
Los Angeles
SEA
Seattle
₩321,400 Roundtrip, found 19 hours ago
₩321,400
Roundtrip
found 19 hours ago
Select Alaska Airlines flight, departing Tue, Nov 3 from Los Angeles to Seattle, returning Tue, Nov 3, priced at ₩321,400 found 19 hours ago
United
Fri, Nov 6 - Sun, Nov 8
LAX
Los Angeles
SEA
Seattle
₩365,700 Roundtrip, found 19 hours ago
₩365,700
Roundtrip
found 19 hours ago
Select United flight, departing Fri, Nov 6 from Los Angeles to Seattle, returning Sun, Nov 8, priced at ₩365,700 found 19 hours ago
American Airlines
Sat, Sep 26 - Sun, Sep 27
LAX
Los Angeles
SEA
Seattle
₩427,200 Roundtrip, found 1 day ago
₩427,200
Roundtrip
found 1 day ago
Select American Airlines flight, departing Sat, Sep 26 from Los Angeles to Seattle, returning Sun, Sep 27, priced at ₩427,200 found 1 day ago
American Airlines
Sat, Sep 12 - Tue, Sep 15
LAX
Los Angeles
PAE
Seattle
₩442,100 Roundtrip, found 2 days ago
₩442,100
Roundtrip
found 2 days ago
Select American Airlines flight, departing Sat, Sep 12 from Los Angeles to Seattle, returning Tue, Sep 15, priced at ₩442,100 found 2 days ago
United
Tue, Nov 3 - Tue, Nov 24
CGK
Jakarta
SEA
Seattle
₩1,123,300 Roundtrip, found 1 day ago
₩1,123,300
Roundtrip
found 1 day ago
Select United flight, departing Tue, Nov 3 from Jakarta to Seattle, returning Tue, Nov 24, priced at ₩1,123,300 found 1 day ago
Philippine Airlines
Sat, Sep 26 - Thu, Oct 1
ICN
Seoul
SEA
Seattle
₩1,128,200 Roundtrip, found 5 days ago
₩1,128,200
Roundtrip
found 5 days ago
Select Philippine Airlines flight, departing Sat, Sep 26 from Seoul to Seattle, returning Thu, Oct 1, priced at ₩1,128,200 found 5 days ago
All Nippon Airways
Tue, Nov 3 - Tue, Nov 24
CGK
Jakarta
SEA
Seattle
₩1,167,600 Roundtrip, found 1 day ago
₩1,167,600
Roundtrip
found 1 day ago
Select All Nippon Airways flight, departing Tue, Nov 3 from Jakarta to Seattle, returning Tue, Nov 24, priced at ₩1,167,600 found 1 day ago
Air Canada
Thu, Dec 24 - Tue, Jan 12
ICN
Seoul
SEA
Seattle
₩1,188,500 Roundtrip, found 2 days ago
₩1,188,500
Roundtrip
found 2 days ago
Select Air Canada flight, departing Thu, Dec 24 from Seoul to Seattle, returning Tue, Jan 12, priced at ₩1,188,500 found 2 days ago
Singapore Airlines
Mon, Oct 26 - Mon, Nov 16
SGN
Ho Chi Minh City
SEA
Seattle
₩1,225,300 Roundtrip, found 1 day ago
₩1,225,300
Roundtrip
found 1 day ago
Select Singapore Airlines flight, departing Mon, Oct 26 from Ho Chi Minh City to Seattle, returning Mon, Nov 16, priced at ₩1,225,300 found 1 day ago

Trending flights to King County

These prices were available within the past 7 days. Prices quoted are per person, round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Philippine Airlines
Sat, Sep 26 - Thu, Oct 1
ICN
Seoul
SEA
Seattle
₩1,128,200 Roundtrip, found 5 days ago
₩1,128,200
Roundtrip
found 5 days ago
Select Philippine Airlines flight, departing Sat, Sep 26 from Seoul to Seattle, returning Thu, Oct 1, priced at ₩1,128,200 found 5 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 ₩291,800.
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 ₩291,800 and ₩1,225,300. Many lucky travelers nabbed one-way tickets from Los Angeles (LAX) for only ₩190,400.
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 ₩291,800 to ₩1,225,300.
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 55ºF to 75ºF 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 traveler'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.