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

Return flights

29 Jan - 09 Feb	Alaska Airlines
05 Jan - 18 Jan	Frontier Airlines
15 Jan - 22 Jan	Hawaiian Airlines
19 Jan - 17 Feb	Hawaiian Airlines
01 Jan - 19 Jan	Delta
01 Jan - 15 Jan	British Airways
08 Jan - 28 Jan	Qantas
02 Jan - 15 Jan	British Airways
02 Jan - 20 Jan	British Airways

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 $1339

Return flights