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

Return flights

12 Sep - 07 Oct	Ryanair
19 Sep - 06 Oct	Qatar Airways
19 Sep - 07 Oct	Ryanair
19 Sep - 05 Oct	Ryanair
24 Sep - 27 Oct	Lufthansa
10 Sep - 06 Oct	Air India
19 Sep - 23 Sep	Ryanair
03 Sep - 10 Sep	Turkish Airlines
03 Sep - 17 Sep	Turkish Airlines
18 Sep - 25 Sep	Ryanair
19 Sep - 29 Sep	Ryanair
03 Sep - 05 Sep	Ryanair
10 Sep - 21 Oct	Air India
26 Sep - 05 Oct	Air India
23 Sep - 07 Oct	Turkish Airlines
14 Sep - 12 Oct	Etihad Airways
15 Sep - 27 Sep	Thai Airways

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

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.

Book a cheap hotel in Sydney

Cheap car rent in Sydney

Cheapest return flights from Copenhagen to Sydney in September from 848€

Return flights