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

Return flights

04 Sep - 11 Sep	China Southern
10 Sep - 17 Sep	China Southern
19 Sep - 19 Oct	China Southern
06 Sep - 26 Oct	China Southern
19 Sep - 14 Oct	China Southern
01 Sep - 27 Oct	IndiGo
17 Sep - 24 Sep	China Southern
22 Sep - 30 Oct	IndiGo
03 Sep - 01 Oct	China Southern
06 Sep - 17 Sep	China Southern
19 Sep - 28 Sep	China Southern
09 Sep - 22 Sep	China Southern
14 Sep - 22 Sep	China Southern
03 Sep - 17 Sep	China Southern
10 Sep - 22 Sep	China Southern
12 Sep - 24 Sep	China Southern
15 Sep - 18 Oct	IndiGo
15 Sep - 17 Oct	IndiGo
20 Sep - 25 Oct	IndiGo
05 Sep - 18 Oct	IndiGo

Also check the deals for one-way flights from Amsterdam 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.

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Cheapest return flights from Amsterdam to Sydney in September from $923

Return flights