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

Return flights

18 Jan - 01 Feb	United
18 Jan - 03 Feb	United
12 Jan - 25 Jan	Qantas
30 Jan - 01 Feb	Frontier Airlines
08 Jan - 28 Jan	Hawaiian Airlines
08 Jan - 12 Jan	Hawaiian Airlines
23 Jan - 28 Jan	Hawaiian Airlines
12 Jan - 19 Jan	Hawaiian Airlines
11 Jan - 18 Jan	Frontier Airlines
01 Jan - 19 Jan	American Airlines
15 Jan - 19 Jan	Hawaiian Airlines
14 Jan - 22 Jan	Turkish Airlines
09 Jan - 19 Jan	United

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 $1206

Return flights