Cheap Flights to King County from NT$1,514

View NT$1,514 flight on Fri, 2026/4/24Opens in a new window

Popular airlines to King County

  • Alaska Airlines

  • Delta

  • American Airlines

  • United

  • Southwest Airlines

  • Frontier Airlines

  • Air Canada

  • Be in the know

    Get alerts if flight prices drop or rise*

  • Book smarter

    Save up to 45% 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 NT$1,514 for one-way flights and NT$2,859 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Mon, May 4 - Mon, May 4
SFO
San Francisco
SEA
Seattle
NT$2,859 Roundtrip, found 2 days ago
NT$2,859
Roundtrip
found 2 days ago
Select Delta flight, departing Mon, May 4 from San Francisco to Seattle, returning Mon, May 4, priced at NT$2,859 found 2 days ago
Delta
Fri, Apr 24 - Mon, Apr 27
DEN
Denver
SEA
Seattle
NT$3,028 Roundtrip, found 1 day ago
NT$3,028
Roundtrip
found 1 day ago
Select Delta flight, departing Fri, Apr 24 from Denver to Seattle, returning Mon, Apr 27, priced at NT$3,028 found 1 day ago
Delta
Thu, Apr 30 - Wed, May 6
LAX
Los Angeles
SEA
Seattle
NT$3,654 Roundtrip, found 12 hours ago
NT$3,654
Roundtrip
found 12 hours ago
Select Delta flight, departing Thu, Apr 30 from Los Angeles to Seattle, returning Wed, May 6, priced at NT$3,654 found 12 hours ago
Delta
Sun, Mar 29 - Fri, May 29
MFR
Medford
SEA
Seattle
NT$5,072 Roundtrip, found 1 day ago
NT$5,072
Roundtrip
found 1 day ago
Select Delta flight, departing Sun, Mar 29 from Medford to Seattle, returning Fri, May 29, priced at NT$5,072 found 1 day ago
United
Thu, Apr 16 - Sun, Apr 19
SFO
San Francisco
SEA
Seattle
NT$5,217 Roundtrip, found 16 hours ago
NT$5,217
Roundtrip
found 16 hours ago
Select United flight, departing Thu, Apr 16 from San Francisco to Seattle, returning Sun, Apr 19, priced at NT$5,217 found 16 hours ago
Alaska Airlines
Tue, Mar 31 - Mon, Apr 13
LAX
Los Angeles
SEA
Seattle
NT$5,542 Roundtrip, found 1 day ago
NT$5,542
Roundtrip
found 1 day ago
Select Alaska Airlines flight, departing Tue, Mar 31 from Los Angeles to Seattle, returning Mon, Apr 13, priced at NT$5,542 found 1 day ago
American Airlines
Mon, May 4 - Mon, May 4
SFO
San Francisco
SEA
Seattle
NT$7,246 Roundtrip, found 2 days ago
NT$7,246
Roundtrip
found 2 days ago
Select American Airlines flight, departing Mon, May 4 from San Francisco to Seattle, returning Mon, May 4, priced at NT$7,246 found 2 days ago
American Airlines
Thu, Apr 30 - Wed, May 6
LAX
Los Angeles
PAE
Seattle
NT$7,406 Roundtrip, found 12 hours ago
NT$7,406
Roundtrip
found 12 hours ago
Select American Airlines flight, departing Thu, Apr 30 from Los Angeles to Seattle, returning Wed, May 6, priced at NT$7,406 found 12 hours ago
American Airlines
Thu, Jul 16 - Wed, Jul 22
SFO
San Francisco
PAE
Seattle
NT$10,627 Roundtrip, found 3 hours ago
NT$10,627
Roundtrip
found 3 hours ago
Select American Airlines flight, departing Thu, Jul 16 from San Francisco to Seattle, returning Wed, Jul 22, priced at NT$10,627 found 3 hours ago
Cathay Pacific
Fri, May 8 - Sat, May 16
TPE
Taipei
SEA
Seattle
NT$19,288 Roundtrip, just found
NT$19,288
Roundtrip
just found
Select Cathay Pacific flight, departing Fri, May 8 from Taipei to Seattle, returning Sat, May 16, priced at NT$19,288 just found

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.

Cathay Pacific
Fri, May 8 - Sat, May 16
TPE
Taipei
SEA
Seattle
NT$19,288 Roundtrip, just found
NT$19,288
Roundtrip
just found
Select Cathay Pacific flight, departing Fri, May 8 from Taipei to Seattle, returning Sat, May 16, priced at NT$19,288 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 NT$2,859.
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$2,859 and NT$19,288. Many lucky travelers nabbed one-way tickets from Denver (DEN) for only NT$1,514.
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$2,859 to NT$19,288.
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.

Explore a world of travel with Expedia

*Available to Expedia members.