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

Return flights

25 Dec - 17 Jan	Air India
06 Dec - 29 Dec	Air India
26 Dec - 18 Jan	Air India
05 Dec - 29 Dec	Air India
01 Dec - 21 Dec	Qatar Airways
26 Dec - 28 Jan	Air China
18 Dec - 05 Jan	Air India
23 Dec - 01 Jan	Thai Airways
12 Dec - 06 Jan	Air China
21 Dec - 13 Jan	Air China
19 Dec - 07 Jan	Air China
19 Dec - 01 Jan	Air China
19 Dec - 03 Jan	Air China
15 Dec - 22 Dec	Air China
12 Dec - 19 Dec	Air China
19 Dec - 22 Dec	Finnair

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 $1242

Return flights