Cheap Flights to King County from ₩577,400

View ₩577,400 flight on Mon, Oct 19, 2026Opens in a new window

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Popular airlines to King County

  • Alaska Airlines

  • Delta

  • American Airlines

  • United

  • Southwest Airlines

  • Frontier Airlines

  • JetBlue Airways

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How much is the cheapest flight to King County?

Prices were available within the past 7 days and start at ₩577,400 for one-way flights and ₩1,180,800 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Air Canada
Mon, Sep 28 - Mon, Oct 5
ICN
Seoul
SEA
Seattle
₩1,180,800 Roundtrip, just found
₩1,180,800
Roundtrip
just found
Select Air Canada flight, departing Mon, Sep 28 from Seoul to Seattle, returning Mon, Oct 5, priced at ₩1,180,800 just found
United
Tue, Sep 8 - Tue, Sep 15
ICN
Seoul
SEA
Seattle
₩1,201,200 Roundtrip, found 21 hours ago
₩1,201,200
Roundtrip
found 21 hours ago
Select United flight, departing Tue, Sep 8 from Seoul to Seattle, returning Tue, Sep 15, priced at ₩1,201,200 found 21 hours ago
Singapore Airlines
Thu, Oct 15 - Thu, Nov 5
HAN
Hanoi
SEA
Seattle
₩1,202,300 Roundtrip, found 14 hours ago
₩1,202,300
Roundtrip
found 14 hours ago
Select Singapore Airlines flight, departing Thu, Oct 15 from Hanoi to Seattle, returning Thu, Nov 5, priced at ₩1,202,300 found 14 hours ago
Singapore Airlines
Thu, Oct 1 - Thu, Oct 22
CGK
Jakarta
SEA
Seattle
₩1,261,600 Roundtrip, found 15 hours ago
₩1,261,600
Roundtrip
found 15 hours ago
Select Singapore Airlines flight, departing Thu, Oct 1 from Jakarta to Seattle, returning Thu, Oct 22, priced at ₩1,261,600 found 15 hours ago
United
Mon, Oct 19 - Mon, Nov 9
SGN
Ho Chi Minh City
SEA
Seattle
₩1,265,200 Roundtrip, found 14 hours ago
₩1,265,200
Roundtrip
found 14 hours ago
Select United flight, departing Mon, Oct 19 from Ho Chi Minh City to Seattle, returning Mon, Nov 9, priced at ₩1,265,200 found 14 hours ago
All Nippon Airways
Wed, Feb 10 - Wed, Feb 17
GMP
Seoul
SEA
Seattle
₩1,281,900 Roundtrip, found 3 hours ago
₩1,281,900
Roundtrip
found 3 hours ago
Select All Nippon Airways flight, departing Wed, Feb 10 from Seoul to Seattle, returning Wed, Feb 17, priced at ₩1,281,900 found 3 hours ago
Delta
Mon, Sep 21 - Mon, Oct 12
HAN
Hanoi
SEA
Seattle
₩1,305,400 Roundtrip, found 15 hours ago
₩1,305,400
Roundtrip
found 15 hours ago
Select Delta flight, departing Mon, Sep 21 from Hanoi to Seattle, returning Mon, Oct 12, priced at ₩1,305,400 found 15 hours ago
Korean Air
Thu, Oct 15 - Thu, Nov 5
HAN
Hanoi
SEA
Seattle
₩1,311,000 Roundtrip, found 14 hours ago
₩1,311,000
Roundtrip
found 14 hours ago
Select Korean Air flight, departing Thu, Oct 15 from Hanoi to Seattle, returning Thu, Nov 5, priced at ₩1,311,000 found 14 hours ago
China Airlines
Mon, Oct 19 - Mon, Nov 9
SGN
Ho Chi Minh City
SEA
Seattle
₩1,336,900 Roundtrip, found 14 hours ago
₩1,336,900
Roundtrip
found 14 hours ago
Select China Airlines flight, departing Mon, Oct 19 from Ho Chi Minh City to Seattle, returning Mon, Nov 9, priced at ₩1,336,900 found 14 hours ago
Qatar Airways
Mon, Oct 19 - Mon, Nov 9
HAN
Hanoi
SEA
Seattle
₩1,479,800 Roundtrip, found 14 hours ago
₩1,479,800
Roundtrip
found 14 hours ago
Select Qatar Airways flight, departing Mon, Oct 19 from Hanoi to Seattle, returning Mon, Nov 9, priced at ₩1,479,800 found 14 hours 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.

Air Canada
Mon, Sep 28 - Mon, Oct 5
ICN
Seoul
SEA
Seattle
₩1,180,800 Roundtrip, just found
₩1,180,800
Roundtrip
just found
Select Air Canada flight, departing Mon, Sep 28 from Seoul to Seattle, returning Mon, Oct 5, priced at ₩1,180,800 just found

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 ₩1,180,800.
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 ₩1,180,800 and ₩1,479,800. Many lucky travelers nabbed one-way tickets from Jakarta (CGK) for only ₩577,400.
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 ₩1,180,800 to ₩1,479,800.
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

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About King County

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