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

Return flights

04 Dec - 13 Dec	Turkish Airlines
15 Dec - 11 Jan	Turkish Airlines
24 Dec - 03 Jan	Turkish Airlines
15 Dec - 15 Jan	Turkish Airlines
22 Dec - 29 Dec	Air China
11 Dec - 18 Dec	Air China
10 Dec - 09 Jan	Turkish Airlines
26 Dec - 09 Jan	Turkish Airlines
23 Dec - 05 Jan	Turkish Airlines
27 Dec - 09 Jan	Turkish Airlines
13 Dec - 25 Jan	Turkish Airlines
21 Dec - 06 Jan	Air China
13 Dec - 19 Jan	Air China
16 Dec - 25 Dec	Turkish Airlines
18 Dec - 25 Dec	Air China
05 Dec - 12 Dec	Virgin Australia
11 Dec - 27 Dec	Air India
19 Dec - 26 Dec	Air China

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 $1363

Return flights