Cheapest one-way flights from Seattle to Sydney in October from 311€

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

One-Way flights

27 Oct Air Canada
24 Oct Air Canada
25 Oct Air Canada
16 Oct Air Canada
20 Oct Air Canada
01 Oct Qantas

Also check the deals for return 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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