AirHint found the following cheapest return flights from Washington (IAD) to Sydney (SYD) in January 2026 (see full year).

Return flights

18 Jan - 18 Feb	Turkish Airlines
19 Jan - 26 Jan	Turkish Airlines
18 Jan - 26 Jan	Turkish Airlines
17 Jan - 19 Jan	Air New Zealand

Also check the deals for one-way flights from Washington to Sydney in January.

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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Cheapest return flights from Washington to Sydney in January from $1529

Return flights