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

Return flights

09 Sep - 19 Sep	Finnair
25 Sep - 28 Sep	Finnair
03 Sep - 10 Sep	Finnair
09 Sep - 14 Sep	Finnair
10 Sep - 25 Sep	Finnair
18 Sep - 28 Sep	Finnair
23 Sep - 29 Sep	Finnair
10 Sep - 14 Sep	Finnair
18 Sep - 25 Sep	Finnair
18 Sep - 26 Sep	Finnair
09 Sep - 07 Oct	Finnair
24 Sep - 08 Oct	Finnair
30 Sep - 06 Oct	Finnair
29 Sep - 14 Oct	Finnair
26 Sep - 05 Oct	Finnair
29 Sep - 12 Oct	Finnair
23 Sep - 03 Oct	Finnair
29 Sep - 07 Oct	Finnair
28 Sep - 06 Oct	Etihad Airways
19 Sep - 11 Oct	Sichuan Airlines

Also check the deals for one-way flights from Madrid 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 Madrid to Singapore in September from 498€

Return flights