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

Return flights

20 Jan - 27 Jan	Delta
26 Jan - 02 Feb	Qantas
26 Jan - 10 Feb	Qantas
26 Jan - 13 Feb	Qantas
31 Jan - 08 Feb	Qantas
26 Jan - 17 Feb	Qantas
26 Jan - 18 Feb	Qantas
31 Jan - 19 Feb	Qantas
26 Jan - 24 Feb	Qantas
28 Jan - 04 Feb	Alaska Airlines
28 Jan - 10 Feb	Alaska Airlines
14 Jan - 22 Jan	Hawaiian Airlines
05 Jan - 19 Jan	Hawaiian Airlines
09 Jan - 19 Jan	United
01 Jan - 19 Jan	Delta

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 729€

Return flights