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

Return flights

22 Sep - 13 Oct	British Airways
17 Sep - 30 Sep	Lufthansa
18 Sep - 30 Sep	Lufthansa
24 Sep - 29 Sep	Lufthansa
16 Sep - 30 Sep	Lufthansa
05 Sep - 19 Sep	Lufthansa
23 Sep - 14 Oct	Lufthansa
06 Sep - 17 Sep	Lufthansa
08 Sep - 15 Sep	Lufthansa
26 Sep - 11 Oct	Lufthansa
30 Sep - 07 Oct	Lufthansa
14 Sep - 25 Sep	Lufthansa
10 Sep - 24 Sep	Lufthansa
10 Sep - 21 Sep	Lufthansa
24 Sep - 12 Oct	Lufthansa
08 Sep - 06 Oct	Lufthansa
08 Sep - 08 Oct	Lufthansa
19 Sep - 10 Oct	IndiGo
29 Sep - 05 Oct	Lufthansa
25 Sep - 16 Oct	Finnair

Also check the deals for one-way flights from Amsterdam to Singapore 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 Singapore in September from $664

Return flights