Cheapest return flights from Seattle to Sydney in June from $903

Best time to book flights for Seattle (SEA) to Sydney (SYD) flights at AirHint

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

Return flights

30 Jun - 21 Jul Alaska Airlines
05 Jun - 13 Jun Hawaiian Airlines
01 Jun - 12 Jun United
04 Jun - 11 Jun Air New Zealand
17 Jun - 24 Jun Delta
25 Jun - 01 Jul Delta
05 Jun - 12 Jun United
07 Jun - 14 Jun Qantas
21 Jun - 28 Jun Delta

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

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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