Cheapest return flights from Washington to Sydney in December from 723€

AirHint found the following cheapest return flights from Washington (DCA) to Sydney (SYD) in December 2025 (see full year).

Return flights

30 Dec - 14 Jan Qantas
10 Dec - 14 Jan Qantas
01 Dec - 08 Dec Delta
04 Dec - 26 Dec Delta
27 Dec - 19 Jan Qantas
24 Dec - 14 Jan Qantas
12 Dec - 14 Dec Hawaiian Airlines
12 Dec - 19 Dec United
26 Dec - 11 Jan Alaska Airlines
24 Dec - 01 Jan Frontier Airlines
17 Dec - 05 Jan Alaska Airlines
20 Dec - 31 Dec United
23 Dec - 03 Jan Fiji Airways

Also check the deals for one-way flights from Washington to Sydney in December.

Powered by

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.

Book a cheap hotel in Sydney

Cheap car rent in Sydney

Feel free to contact us with any feedback or request another flight research.