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

Return flights

14 Jan - 04 Feb	Frontier Airlines
19 Jan - 28 Feb	Turkish Airlines
18 Jan - 28 Feb	Turkish Airlines
17 Jan - 28 Feb	Turkish Airlines
16 Jan - 28 Feb	Turkish Airlines
09 Jan - 19 Jan	United
01 Jan - 19 Jan	Delta
14 Jan - 22 Jan	Emirates

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 1244€

Return flights