Cheapest one-way flights from Seattle to Sydney in May from $595

Best time to book flights for Seattle (SEA) to Sydney (SYD) flights at AirHint

AirHint found the following cheapest one-way flights from Seattle (SEA) to Sydney (SYD) in May 2025 (see full year).

One-Way flights

05 May United

Also check the deals for return flights from Seattle to Sydney in May.

Skyscanner

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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