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

Return flights

03 Dec - 10 Dec	Scoot
03 Dec - 06 Dec	Scoot
03 Dec - 17 Dec	Scoot
07 Dec - 25 Jan	Scoot
01 Dec - 10 Jan	Scoot
03 Dec - 11 Dec	Air China
08 Dec - 20 Dec	Air China
28 Dec - 27 Jan	Air China
02 Dec - 17 Dec	Jetstar
09 Dec - 16 Dec	Hainan Airlines
09 Dec - 06 Jan	Hainan Airlines
06 Dec - 20 Dec	Air China
10 Dec - 23 Dec	Air China
09 Dec - 11 Jan	Hainan Airlines
16 Dec - 20 Jan	Hainan Airlines
09 Dec - 29 Dec	Hainan Airlines
01 Dec - 01 Jan	Scoot
16 Dec - 21 Jan	Hainan Airlines
09 Dec - 21 Jan	Scoot
15 Dec - 11 Jan	AirAsia X

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

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 Sydney to Copenhagen in December from 880€

Return flights