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

Return flights

09 Sep - 23 Sep	Air China
04 Sep - 18 Sep	Air China
09 Sep - 18 Sep	Air China
17 Sep - 24 Sep	Finnair
07 Sep - 22 Sep	Finnair
25 Sep - 07 Oct	Finnair
25 Sep - 21 Oct	Finnair
25 Sep - 08 Oct	Finnair
07 Sep - 19 Sep	Air China
29 Sep - 12 Oct	Ryanair
25 Sep - 28 Sep	Ryanair
09 Sep - 15 Sep	Air China
24 Sep - 30 Sep	Air France
25 Sep - 30 Sep	Air France
24 Sep - 07 Oct	Air France
24 Sep - 09 Oct	Wizz Air Malta
24 Sep - 01 Oct	Etihad Airways
16 Sep - 01 Oct	Etihad Airways
23 Sep - 01 Oct	Etihad Airways
26 Sep - 29 Oct	Finnair

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 $654

Return flights