Flight to King County

View S$63 flight on Fri, 13 Mar, 2026Opens 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 40% on select hotels after you book a flight*

  • Earn twice

    Earn your airline miles on top of our rewards
    Sign in

Cheap round-trip flights to King County

Prices were available within the past 7 days and start at S$63 for one-way flights and S$145 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Wed, 18 Feb - Wed, 18 Feb
SFO
San Francisco
SEA
Seattle
S$145 Return, found 3 days ago
S$145
Return
found 3 days ago
Select Delta flight, departing Wed, 18 Feb from San Francisco to Seattle, returning Wed, 18 Feb, priced at S$145 found 3 days ago
Alaska Airlines
Sun, 15 Feb - Mon, 23 Feb
SFO
San Francisco
SEA
Seattle
S$151 Return, found 3 days ago
S$151
Return
found 3 days ago
Select Alaska Airlines flight, departing Sun, 15 Feb from San Francisco to Seattle, returning Mon, 23 Feb, priced at S$151 found 3 days ago
Delta
Thu, 19 Mar - Wed, 25 Mar
LAX
Los Angeles
SEA
Seattle
S$191 Return, found 2 days ago
S$191
Return
found 2 days ago
Select Delta flight, departing Thu, 19 Mar from Los Angeles to Seattle, returning Wed, 25 Mar, priced at S$191 found 2 days ago
United
Thu, 5 Mar - Thu, 12 Mar
SFO
San Francisco
SEA
Seattle
S$243 Return, found 1 day ago
S$243
Return
found 1 day ago
Select United flight, departing Thu, 5 Mar from San Francisco to Seattle, returning Thu, 12 Mar, priced at S$243 found 1 day ago
Alaska Airlines
Wed, 25 Feb - Sat, 28 Feb
SFO
San Francisco
PAE
Seattle
S$274 Return, found 5 days ago
S$274
Return
found 5 days ago
Select Alaska Airlines flight, departing Wed, 25 Feb from San Francisco to Seattle, returning Sat, 28 Feb, priced at S$274 found 5 days ago
American Airlines
Wed, 25 Mar - Sat, 28 Mar
LAX
Los Angeles
PAE
Seattle
S$280 Return, found 1 day ago
S$280
Return
found 1 day ago
Select American Airlines flight, departing Wed, 25 Mar from Los Angeles to Seattle, returning Sat, 28 Mar, priced at S$280 found 1 day ago
Delta
Fri, 30 Jan - Sun, 15 Feb
TPE
Taipei
SEA
Seattle
S$789 Return, found 5 days ago
S$789
Return
found 5 days ago
Select Delta flight, departing Fri, 30 Jan from Taipei to Seattle, returning Sun, 15 Feb, priced at S$789 found 5 days ago
Cathay Pacific
Wed, 2 Dec - Thu, 10 Dec
TPE
Taipei
SEA
Seattle
S$792 Return, found 6 days ago
S$792
Return
found 6 days ago
Select Cathay Pacific flight, departing Wed, 2 Dec from Taipei to Seattle, returning Thu, 10 Dec, priced at S$792 found 6 days ago
Hainan Airlines
Wed, 11 Mar - Thu, 19 Mar
SIN
Singapore
SEA
Seattle
S$911 Return, found 4 days ago
S$911
Return
found 4 days ago
Select Hainan Airlines flight, departing Wed, 11 Mar from Singapore to Seattle, returning Thu, 19 Mar, priced at S$911 found 4 days ago
Korean Air
Tue, 24 Mar - Fri, 10 Apr
TPE
Taipei
SEA
Seattle
S$932 Return, found 18 hours ago
S$932
Return
found 18 hours ago
Select Korean Air flight, departing Tue, 24 Mar from Taipei to Seattle, returning Fri, 10 Apr, priced at S$932 found 18 hours ago
Expedia offers flights to King County to meet every traveller'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.

King County Flights Information

Airlines serving
Delta, United, American Airlines, Alaska Airlines, Hainan Airlines, Cathay Pacific, Korean Air
Roundtrip price
from S$145

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 S$145.
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 S$145 and S$932. Many lucky travellers nabbed one-way tickets from San Francisco (SFO) for only S$63.
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 travelling 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 S$145 to S$932.
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 13ºC to 24ºC 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.

Trending flights to King County

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

Hainan Airlines
Wed, 11 Mar - Thu, 19 Mar
SIN
Singapore
SEA
Seattle
S$911 Return, found 4 days ago
S$911
Return
found 4 days ago
Select Hainan Airlines flight, departing Wed, 11 Mar from Singapore to Seattle, returning Thu, 19 Mar, priced at S$911 found 4 days ago
*Available to Expedia members.