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

Return flights

08 Sep - 15 Sep	Qatar Airways
13 Sep - 27 Sep	IndiGo
25 Sep - 05 Oct	Turkish Airlines
01 Sep - 14 Sep	Qatar Airways
01 Sep - 20 Sep	Qatar Airways
08 Sep - 15 Sep	Finnair	direct
24 Sep - 28 Sep	Finnair	direct
25 Sep - 05 Oct	Finnair	direct
01 Sep - 14 Sep	Finnair	direct
27 Sep - 10 Oct	IndiGo
28 Sep - 11 Oct	IndiGo
01 Sep - 20 Sep	Finnair	direct
28 Sep - 11 Oct	Finnair	direct
27 Sep - 10 Oct	Finnair	direct
12 Sep - 26 Sep	Scandinavian Airlines
03 Sep - 05 Sep	Scandinavian Airlines

Also check the deals for one-way flights from Singapore to Helsinki 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 Singapore to Helsinki in September from $709

Return flights