Cheapest return flights from Seattle to Sydney in October from 665€

AirHint found the following cheapest return flights from Seattle (SEA) to Sydney (SYD) in October 2025 (see full year).

Return flights

27 Oct - 12 Nov Air Canada
01 Oct - 12 Oct Qantas
30 Oct - 07 Nov United
09 Oct - 17 Oct ANA
08 Oct - 29 Oct United

Also check the deals for one-way flights from Seattle to Sydney in October.

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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