Cheapest one-way flights from Seattle to Sydney in August from 332€

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

One-Way flights

13 Aug Qantas
29 Aug Qantas
18 Aug United
04 Aug United
23 Aug Alaska Airlines
01 Aug Alaska Airlines
22 Aug Hawaiian Airlines

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

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.

Book a cheap hotel in Sydney

Cheap car rent in Sydney

Feel free to contact us with any feedback or request another flight research.