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Find the Cheapest Flights from Seattle-Tacoma International Airport to United States

Unlock the cheapest flights and the best airfares from Seattle-Tacoma International Airport to United States. Make your dream trip both memorable and affordable!

Airline Frontier Airlines icon
Sun, May 24SEA-LAS
Frontier Airlines
oneway$25
Airline Frontier Airlines icon
Sun, May 17SEA-LAX
Frontier Airlines
oneway$30
Airline Frontier Airlines icon
Wed, May 13SEA-DEN
Frontier Airlines
oneway$50
Airline Frontier Airlines icon
Fri, Jun 5SEA-ONT
Frontier Airlines
oneway$57

Seattle-Tacoma International Airport to United States: Flight information

Cheapest flight found$25
Cheapest month to flyMay
Most popular airlineFrontier Airlines
Average flight duration2h 39m

Cheapest flight found

Jun 2026

$127

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