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

Return flights

22 Sep - 05 Oct	IndiGo
20 Sep - 05 Oct	IndiGo
19 Sep - 30 Sep	KLM
17 Sep - 22 Sep	Air France
14 Sep - 30 Sep	KLM
26 Sep - 05 Oct	KLM
02 Sep - 09 Sep	Turkish Airlines
02 Sep - 07 Sep	Turkish Airlines
01 Sep - 07 Sep	KLM
01 Sep - 10 Sep	KLM
07 Sep - 06 Oct	Lufthansa
07 Sep - 05 Oct	Lufthansa

Also check the deals for one-way flights from Mumbai 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 Mumbai to Helsinki in September from 443€

Return flights