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

Return flights

16 Sep - 23 Sep	Turkish Airlines
22 Sep - 06 Oct	China Eastern
23 Sep - 13 Oct	Qatar Airways
21 Sep - 06 Oct	Turkish Airlines
09 Sep - 20 Sep	Qatar Airways
21 Sep - 05 Oct	Turkish Airlines
12 Sep - 19 Sep	Qatar Airways
11 Sep - 15 Sep	Turkish Airlines
25 Sep - 12 Oct	Turkish Airlines
20 Sep - 25 Sep	Qatar Airways
27 Sep - 12 Oct	Etihad Airways
28 Sep - 05 Oct	IndiGo
21 Sep - 03 Oct	IndiGo
01 Sep - 08 Sep	IndiGo
23 Sep - 04 Oct	Etihad Airways
25 Sep - 11 Oct	Etihad Airways
16 Sep - 23 Sep	Finnair	direct
11 Sep - 15 Sep	Finnair	direct
20 Sep - 25 Sep	Finnair	direct
12 Sep - 19 Sep	Finnair	direct

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 $690

Return flights