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Cheap Flights to King County from NT$2,520

View NT$2,520 flight on Wed, 2026/8/12Opens in a new window

Popular airlines to King County

  • Alaska Airlines

  • Delta

  • American Airlines

  • United

  • Frontier Airlines

  • Southwest 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 NT$2,520 for one-way flights and NT$4,864 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Sat, Oct 17 - Sat, Oct 17
SFO
San Francisco
SEA
Seattle
NT$4,864 Roundtrip, found 21 hours ago
NT$4,864
Roundtrip
found 21 hours ago
Select Delta flight, departing Sat, Oct 17 from San Francisco to Seattle, returning Sat, Oct 17, priced at NT$4,864 found 21 hours ago
United
Sat, Sep 5 - Fri, Sep 11
SFO
San Francisco
SEA
Seattle
NT$7,609 Roundtrip, found 1 day ago
NT$7,609
Roundtrip
found 1 day ago
Select United flight, departing Sat, Sep 5 from San Francisco to Seattle, returning Fri, Sep 11, priced at NT$7,609 found 1 day ago
Alaska Airlines
Sat, Oct 17 - Tue, Oct 20
SFO
San Francisco
PAE
Seattle
NT$8,581 Roundtrip, found 21 hours ago
NT$8,581
Roundtrip
found 21 hours ago
Select Alaska Airlines flight, departing Sat, Oct 17 from San Francisco to Seattle, returning Tue, Oct 20, priced at NT$8,581 found 21 hours ago
American Airlines
Tue, Sep 8 - Sat, Sep 12
SFO
San Francisco
SEA
Seattle
NT$9,222 Roundtrip, found 4 days ago
NT$9,222
Roundtrip
found 4 days ago
Select American Airlines flight, departing Tue, Sep 8 from San Francisco to Seattle, returning Sat, Sep 12, priced at NT$9,222 found 4 days ago
Cathay Pacific
Wed, Sep 30 - Sat, Oct 10
HKG
Hong Kong SAR
SEA
Seattle
NT$18,523 Roundtrip, found 16 hours ago
NT$18,523
Roundtrip
found 16 hours ago
Select Cathay Pacific flight, departing Wed, Sep 30 from Hong Kong SAR to Seattle, returning Sat, Oct 10, priced at NT$18,523 found 16 hours ago
Air Canada
Tue, Nov 17 - Fri, Nov 27
HKG
Hong Kong SAR
SEA
Seattle
NT$18,575 Roundtrip, found 1 day ago
NT$18,575
Roundtrip
found 1 day ago
Select Air Canada flight, departing Tue, Nov 17 from Hong Kong SAR to Seattle, returning Fri, Nov 27, priced at NT$18,575 found 1 day ago
United
Thu, Sep 10 - Fri, Sep 11
TPE
Taipei
SEA
Seattle
NT$19,839 Roundtrip, found 20 hours ago
NT$19,839
Roundtrip
found 20 hours ago
Select United flight, departing Thu, Sep 10 from Taipei to Seattle, returning Fri, Sep 11, priced at NT$19,839 found 20 hours ago
United
Tue, Nov 10 - Tue, Dec 1
KHH
Kaohsiung
SEA
Seattle
NT$20,785 Roundtrip, found 13 hours ago
NT$20,785
Roundtrip
found 13 hours ago
Select United flight, departing Tue, Nov 10 from Kaohsiung to Seattle, returning Tue, Dec 1, priced at NT$20,785 found 13 hours ago
Korean Air
Tue, Sep 8 - Fri, Sep 18
TPE
Taipei
SEA
Seattle
NT$22,060 Roundtrip, found 1 day ago
NT$22,060
Roundtrip
found 1 day ago
Select Korean Air flight, departing Tue, Sep 8 from Taipei to Seattle, returning Fri, Sep 18, priced at NT$22,060 found 1 day ago
Cathay Pacific
Tue, Sep 29 - Tue, Oct 20
TPE
Taipei
SEA
Seattle
NT$22,259 Roundtrip, found 1 hour ago
NT$22,259
Roundtrip
found 1 hour ago
Select Cathay Pacific flight, departing Tue, Sep 29 from Taipei to Seattle, returning Tue, Oct 20, priced at NT$22,259 found 1 hour 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.

United
Thu, Sep 10 - Fri, Sep 11
TPE
Taipei
SEA
Seattle
NT$19,839 Roundtrip, found 20 hours ago
NT$19,839
Roundtrip
found 20 hours ago
Select United flight, departing Thu, Sep 10 from Taipei to Seattle, returning Fri, Sep 11, priced at NT$19,839 found 20 hours 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 NT$4,864.
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 NT$4,864 and NT$22,259. Many lucky travelers nabbed one-way tickets from San Francisco (SFO) for only NT$2,520.
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 NT$4,864 to NT$22,259.
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.
*Available to Expedia members.