A cityscape with a prominent tower, a body of water, and a distant mountain.

King County Flights - Book Cheap Flights to King County

View P63,987 flight on Wed, Jul 15, 2026Opens in a new window

Popular airlines to King County

  • Alaska Airlines

  • Delta

  • American Airlines

  • United

  • Southwest Airlines

  • Frontier Airlines

  • JetBlue Airways

  • Be in the know

    Get alerts if flight prices drop or rise*

  • Book smarter

    Save up to 35% 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 P63,987 for one-way flights and P105,685 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Philippine Airlines
Tue, Jul 21 - Sun, Aug 30
MNL
Manila
SEA
Seattle
P105,685 Roundtrip, found 21 hours ago
P105,685
Roundtrip
found 21 hours ago
Select Philippine Airlines flight, departing Tue, Jul 21 from Manila to Seattle, returning Sun, Aug 30, priced at P105,685 found 21 hours ago
Philippine Airlines
Tue, Jul 21 - Sun, Aug 30
MNL
Manila
SEA
Seattle
P106,404 Roundtrip, found 21 hours ago
P106,404
Roundtrip
found 21 hours ago
Select Philippine Airlines flight, departing Tue, Jul 21 from Manila to Seattle, returning Sun, Aug 30, priced at P106,404 found 21 hours ago
Philippine Airlines
Mon, Nov 2 - Mon, Nov 23
MNL
Manila
SEA
Seattle
P109,493 Roundtrip, found 5 days ago
P109,493
Roundtrip
found 5 days ago
Select Philippine Airlines flight, departing Mon, Nov 2 from Manila to Seattle, returning Mon, Nov 23, priced at P109,493 found 5 days ago
Philippine Airlines
Fri, Sep 4 - Sun, Sep 20
MNL
Manila
SEA
Seattle
P111,551 Roundtrip, found 3 hours ago
P111,551
Roundtrip
found 3 hours ago
Select Philippine Airlines flight, departing Fri, Sep 4 from Manila to Seattle, returning Sun, Sep 20, priced at P111,551 found 3 hours ago
Philippine Airlines
Tue, Sep 1 - Wed, Sep 9
MNL
Manila
SEA
Seattle
P111,556 Roundtrip, found 5 days ago
P111,556
Roundtrip
found 5 days ago
Select Philippine Airlines flight, departing Tue, Sep 1 from Manila to Seattle, returning Wed, Sep 9, priced at P111,556 found 5 days ago
Philippine Airlines
Tue, Sep 1 - Mon, Sep 21
MNL
Manila
SEA
Seattle
P111,614 Roundtrip, found 6 days ago
P111,614
Roundtrip
found 6 days ago
Select Philippine Airlines flight, departing Tue, Sep 1 from Manila to Seattle, returning Mon, Sep 21, priced at P111,614 found 6 days ago
Philippine Airlines
Mon, Sep 7 - Sun, Sep 27
MNL
Manila
SEA
Seattle
P111,654 Roundtrip, found 5 days ago
P111,654
Roundtrip
found 5 days ago
Select Philippine Airlines flight, departing Mon, Sep 7 from Manila to Seattle, returning Sun, Sep 27, priced at P111,654 found 5 days ago
Philippine Airlines
Sun, Sep 6 - Sun, Sep 20
MNL
Manila
SEA
Seattle
P111,694 Roundtrip, found 5 days ago
P111,694
Roundtrip
found 5 days ago
Select Philippine Airlines flight, departing Sun, Sep 6 from Manila to Seattle, returning Sun, Sep 20, priced at P111,694 found 5 days ago
China Airlines
Thu, Sep 10 - Sun, Sep 20
TPE
Taipei
SEA
Seattle
P116,492 Roundtrip, found 13 hours ago
P116,492
Roundtrip
found 13 hours ago
Select China Airlines flight, departing Thu, Sep 10 from Taipei to Seattle, returning Sun, Sep 20, priced at P116,492 found 13 hours ago
Malaysia Airlines
Sun, Sep 6 - Sat, Sep 19
KUL
Kuala Lumpur
SEA
Seattle
P116,505 Roundtrip, found 1 day ago
P116,505
Roundtrip
found 1 day ago
Select Malaysia Airlines flight, departing Sun, Sep 6 from Kuala Lumpur to Seattle, returning Sat, Sep 19, priced at P116,505 found 1 day ago

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.

Philippine Airlines
Tue, Jul 21 - Sun, Aug 30
MNL
Manila
SEA
Seattle
P105,685 Roundtrip, found 21 hours ago
P105,685
Roundtrip
found 21 hours ago
Select Philippine Airlines flight, departing Tue, Jul 21 from Manila to Seattle, returning Sun, Aug 30, priced at P105,685 found 21 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 P105,685.
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 P105,685 and P116,505. Many lucky travelers nabbed one-way tickets from Manila (MNL) for only P63,987.
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.

How much is a plane ticket to King County?
In the last seven days, plane fares to King County varied from P105,685 to P116,505.
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.

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
*Available to Expedia members.