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

Return flights

13 Jan - 27 Jan	Frontier Airlines
14 Jan - 22 Jan	Frontier Airlines
01 Jan - 19 Jan	Delta
05 Jan - 19 Jan	Qantas
09 Jan - 19 Jan	United
08 Jan - 28 Jan	Qantas
15 Jan - 18 Jan	Qantas

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 $1372

Return flights