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

Return flights

03 Sep - 17 Sep	Fly One
24 Sep - 09 Oct	Turkish Airlines
03 Sep - 24 Sep	Air China
04 Sep - 22 Sep	Air China
10 Sep - 23 Sep	Air China
10 Sep - 22 Sep	Air China
08 Sep - 21 Sep	Air China
08 Sep - 22 Sep	Air China
11 Sep - 21 Sep	Air China
07 Sep - 11 Oct	Etihad Airways
06 Sep - 24 Sep	Etihad Airways
01 Sep - 17 Sep	Etihad Airways
19 Sep - 19 Oct	Air China
23 Sep - 04 Oct	Etihad Airways
26 Sep - 03 Oct	Etihad Airways
26 Sep - 04 Oct	Etihad Airways
25 Sep - 07 Oct	Finnair
25 Sep - 06 Oct	Finnair
26 Sep - 10 Oct	Etihad Airways
22 Sep - 02 Oct	Finnair

Also check the deals for one-way flights from Frankfurt 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 Frankfurt to Singapore in September from 512€

Return flights