Cheapest return flights from Seattle to Sydney in October from 717€

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

Return flights

29 Oct - 05 Nov Alaska Airlines
14 Oct - 23 Oct Qantas

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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