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

Return flights

28 Dec - 25 Jan	Air China
31 Dec - 15 Jan	Air China
28 Dec - 04 Jan	Air China
04 Dec - 07 Jan	Turkish Airlines
28 Dec - 10 Jan	Air China
27 Dec - 03 Jan	Air China
11 Dec - 31 Dec	Air India
11 Dec - 02 Jan	Air India
23 Dec - 03 Jan	Air India
21 Dec - 12 Jan	Air China
01 Dec - 22 Dec	Emirates
13 Dec - 27 Dec	Air India
25 Dec - 17 Jan	Air China
20 Dec - 27 Dec	Air China
07 Dec - 28 Dec	Air China
08 Dec - 27 Dec	Air China
08 Dec - 22 Dec	Air China
08 Dec - 26 Dec	British Airways
11 Dec - 18 Dec	British Airways

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 1159€

Return flights