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

One-Way flights

24 Sep	IndiGo
28 Sep	Turkish Airlines
14 Sep	Turkish Airlines
16 Sep	Turkish Airlines
29 Sep	IndiGo
20 Sep	AirAsia
28 Sep	Finnair	direct
03 Sep	Finnair	direct
29 Sep	Finnair	direct
14 Sep	Finnair	direct

Also check the deals for return 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 one-way flights from Singapore to Helsinki in September from $369

One-Way flights