Cheap flights from Seattle to Sydney

Looking for cheap flights from Seattle to Sydney? We track round-trip fares from SEA to SYD around the clock and post the sharpest price drops here first. The best fare we’ve found is $1,089 round-trip, against a typical fare of about $1,597 — savings of roughly 32%. Flights from Seattle to Sydney include a stop along the way, and the best sale fares tend to disappear within a day or two. Create a free account to see full deal details, or go Premium for an email alert the moment a Sydney fare drops.

Sydney, Australia, is a destination that captivates visitors with its stunning landmarks, particularly the iconic sails of the Opera House and the Sydney Harbour Bridge, which shine brilliantly during golden hour. The best times to visit Sydney are during the shoulder seasons of spring (September to November) and autumn (March to May), when the weather is pleasant and crowds are smaller. This is typically when you can find cheap flights from Seattle to Sydney, as peak tourist seasons in summer and winter drive up prices.

Traveling from Seattle (SEA) to Sydney (SYD) usually involves one stop, often in a major hub like Los Angeles or San Francisco. To snag flight deals, aim to book your tickets at least two to three months in advance, as this window often yields the best prices. Flexibility with your travel dates can also help you capitalize on seasonal fare sales, making it easier to find those coveted cheap flights from Seattle to Sydney.