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Cheap Flights to King County from ₩108,700

View ₩108,700 flight on Wed, Sep 16, 2026Opens in a new window

Flight 1

Flight 2

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 ₩108,700 for one-way flights and ₩217,600 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Tue, Sep 1 - Wed, Sep 30
SFO
San Francisco
SEA
Seattle
₩217,600 Roundtrip, found 11 hours ago
₩217,600
Roundtrip
found 11 hours ago
Select Delta flight, departing Tue, Sep 1 from San Francisco to Seattle, returning Wed, Sep 30, priced at ₩217,600 found 11 hours ago
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
Delta
Tue, Sep 8 - Tue, Sep 22
SNA
Orange County
SEA
Seattle
₩306,600 Roundtrip, found 4 days ago
₩306,600
Roundtrip
found 4 days ago
Select Delta flight, departing Tue, Sep 8 from Orange County to Seattle, returning Tue, Sep 22, priced at ₩306,600 found 4 days ago
Alaska Airlines
Tue, Nov 3 - Tue, Nov 3
LAX
Los Angeles
SEA
Seattle
₩321,400 Roundtrip, found 23 hours ago
₩321,400
Roundtrip
found 23 hours ago
Select Alaska Airlines flight, departing Tue, Nov 3 from Los Angeles to Seattle, returning Tue, Nov 3, priced at ₩321,400 found 23 hours ago
United
Tue, Sep 1 - Wed, Sep 30
SFO
San Francisco
SEA
Seattle
₩336,100 Roundtrip, found 11 hours ago
₩336,100
Roundtrip
found 11 hours ago
Select United flight, departing Tue, Sep 1 from San Francisco to Seattle, returning Wed, Sep 30, priced at ₩336,100 found 11 hours ago
Alaska Airlines
Tue, Aug 25 - Wed, Aug 26
SNA
Orange County
PAE
Seattle
₩380,300 Roundtrip, found 4 days ago
₩380,300
Roundtrip
found 4 days ago
Select Alaska Airlines flight, departing Tue, Aug 25 from Orange County to Seattle, returning Wed, Aug 26, priced at ₩380,300 found 4 days ago
Alaska Airlines
Wed, Oct 28 - Tue, Nov 17
SFO
San Francisco
PAE
Seattle
₩380,700 Roundtrip, found 2 days ago
₩380,700
Roundtrip
found 2 days ago
Select Alaska Airlines flight, departing Wed, Oct 28 from San Francisco to Seattle, returning Tue, Nov 17, priced at ₩380,700 found 2 days ago
American Airlines
Tue, Sep 1 - Wed, Sep 30
SFO
San Francisco
SEA
Seattle
₩396,600 Roundtrip, found 11 hours ago
₩396,600
Roundtrip
found 11 hours ago
Select American Airlines flight, departing Tue, Sep 1 from San Francisco to Seattle, returning Wed, Sep 30, priced at ₩396,600 found 11 hours 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
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

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 ₩217,600.
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 ₩217,600 and ₩1,128,200. Many lucky travelers nabbed one-way tickets from San Francisco (SFO) for only ₩108,700.
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 ₩217,600 to ₩1,128,200.
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
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