AirHint found the following cheapest one-way flights from Seattle (SEA) to Sydney (SYD) in May 2026 (see full year).
One-Way flights
| 18 May | ANA | ||
| 05 May | ANA | ||
| 17 May | ANA | ||
| 06 May | Air Canada |
Also check the deals for return flights from Seattle to Sydney in May.
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