Cheapest return DCA–SYD flights, December

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

Return flights

08 Dec - 14 Dec Alaska Airlines
01 Dec - 10 Dec United
01 Dec - 11 Dec United
14 Dec - 21 Dec Alaska Airlines
26 Dec - 07 Jan Qantas
26 Dec - 08 Jan Qantas
26 Dec - 09 Jan Qantas
03 Dec - 11 Dec Qantas
04 Dec - 11 Dec Qantas
26 Dec - 04 Jan Qantas
26 Dec - 05 Jan Qantas
26 Dec - 02 Jan Qantas
26 Dec - 03 Jan Qantas
17 Dec - 23 Dec Alaska Airlines
06 Dec - 11 Dec Qantas
07 Dec - 11 Dec Qantas
08 Dec - 11 Dec Qantas
27 Dec - 10 Jan Air Canada
26 Dec - 01 Jan Qantas

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

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