Cheap Flights to King County from $29

View $29 flight on Sun, Feb 15, 2026Opens in a new window

Popular airlines to King County

  • Alaska Airlines

    Alaska Airlines

  • American Airlines

    American Airlines

  • United

    United

  • Delta

    Delta

  • Southwest Airlines

    Southwest Airlines

  • Frontier Airlines

    Frontier Airlines

  • Air Canada

    Air Canada

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How much is the cheapest flight to King County?

Prices were available within the past 7 days and start at $29 for one-way flights and $48 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frontier Airlines
Fri, Mar 20 - Mon, Mar 30
LAS
Las Vegas
SEA
Seattle
$48 Roundtrip, found 8 hours ago
$48
Roundtrip
found 8 hours ago
Select Frontier Airlines flight, departing Fri, Mar 20 from Las Vegas to Seattle, returning Mon, Mar 30, priced at $48 found 8 hours ago
Frontier Airlines
Thu, Mar 12 - Sun, Mar 15
PHX
Phoenix
SEA
Seattle
$58 Roundtrip, just found
$58
Roundtrip
just found
Select Frontier Airlines flight, departing Thu, Mar 12 from Phoenix to Seattle, returning Sun, Mar 15, priced at $58 just found
Frontier Airlines
Fri, Jan 16 - Thu, Jan 22
LAX
Los Angeles
SEA
Seattle
$58 Roundtrip, just found
$58
Roundtrip
just found
Select Frontier Airlines flight, departing Fri, Jan 16 from Los Angeles to Seattle, returning Thu, Jan 22, priced at $58 just found
Frontier Airlines
Sat, Feb 28 - Sun, Mar 8
PHX
Phoenix
SEA
Seattle
$59 Roundtrip, found 12 hours ago
$59
Roundtrip
found 12 hours ago
Select Frontier Airlines flight, departing Sat, Feb 28 from Phoenix to Seattle, returning Sun, Mar 8, priced at $59 found 12 hours ago
Frontier Airlines
Wed, Mar 25 - Mon, Mar 30
PHX
Phoenix
SEA
Seattle
$63 Roundtrip, found 8 hours ago
$63
Roundtrip
found 8 hours ago
Select Frontier Airlines flight, departing Wed, Mar 25 from Phoenix to Seattle, returning Mon, Mar 30, priced at $63 found 8 hours ago
Frontier Airlines
Sat, Mar 21 - Thu, Mar 26
PHX
Phoenix
SEA
Seattle
$67 Roundtrip, found 3 hours ago
$67
Roundtrip
found 3 hours ago
Select Frontier Airlines flight, departing Sat, Mar 21 from Phoenix to Seattle, returning Thu, Mar 26, priced at $67 found 3 hours ago
American Airlines
Tue, Jan 27 - Sat, Feb 28
PHX
Phoenix
SEA
Seattle
$69 Roundtrip, found 7 hours ago
$69
Roundtrip
found 7 hours ago
Select American Airlines flight, departing Tue, Jan 27 from Phoenix to Seattle, returning Sat, Feb 28, priced at $69 found 7 hours ago
Southwest Airlines
Fri, Mar 6 - Mon, Mar 9
LAS
Las Vegas
SEA
Seattle
$97 Roundtrip, just found
$97
Roundtrip
just found
Select Southwest Airlines flight, departing Fri, Mar 6 from Las Vegas to Seattle, returning Mon, Mar 9, priced at $97 just found
Alaska Airlines
Tue, Jan 13 - Sun, Jan 18
SNA
Orange County
PAE
Seattle
$99 Roundtrip, found 19 hours ago
$99
Roundtrip
found 19 hours ago
Select Alaska Airlines flight, departing Tue, Jan 13 from Orange County to Seattle, returning Sun, Jan 18, priced at $99 found 19 hours ago
United
Wed, Jan 14 - Sat, Jan 24
SFO
San Francisco
SEA
Seattle
$117 Roundtrip, just found
$117
Roundtrip
just found
Select United flight, departing Wed, Jan 14 from San Francisco to Seattle, returning Sat, Jan 24, priced at $117 just found

Airports in King County

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Seattle - Tacoma Intl. SEA. Cheapest option available. Flights from $259
SEA
Seattle - Tacoma Intl.
Cheapest
Flights from $259

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.

Alaska Airlines
Thu, Jan 15 - Sun, Jan 18
PDX
Portland
SEA
Seattle
$79 Roundtrip, found 5 hours ago
$79
Roundtrip
found 5 hours ago
Select Alaska Airlines flight, departing Thu, Jan 15 from Portland to Seattle, returning Sun, Jan 18, priced at $79 found 5 hours ago

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Travel information

King County Flights Information

Airlines serving
Frontier Airlines, Alaska Airlines, Southwest Airlines, Delta, American Airlines, United
Roundtrip price
from $48
King County Flights Information

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