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

Return flights

20 Sep - 14 Oct	Ryanair
14 Sep - 12 Oct	Qatar Airways
10 Sep - 17 Sep	Ryanair
10 Sep - 14 Sep	Ryanair
15 Sep - 13 Oct	Etihad Airways
07 Sep - 14 Sep	Norwegian Air Sweden AOC
02 Sep - 09 Sep	Wizz Air
03 Sep - 10 Sep	Turkish Airlines
09 Sep - 16 Sep	easyJet
17 Sep - 24 Sep	Norwegian Air Sweden AOC
09 Sep - 05 Oct	Ryanair
10 Sep - 24 Sep	Ryanair
09 Sep - 13 Sep	Ryanair
23 Sep - 30 Sep	Norwegian Air Sweden AOC
29 Sep - 06 Oct	easyJet
24 Sep - 01 Oct	Ryanair
23 Sep - 08 Oct	Qatar Airways
28 Sep - 05 Oct	Ryanair
25 Sep - 02 Oct	Norwegian Air Sweden AOC
27 Sep - 04 Oct	Ryanair

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 $1001

Return flights