AirHint found the following cheapest return flights from Bangkok (BKK) to Helsinki (HEL) in October 2025 (see full year).

Return flights

06 Oct - 20 Oct	IndiGo
18 Oct - 11 Nov	IndiGo
10 Oct - 15 Oct	IndiGo
02 Oct - 15 Oct	IndiGo
18 Oct - 25 Oct	IndiGo
03 Oct - 10 Oct	IndiGo
10 Oct - 15 Oct	Finnair	direct
18 Oct - 22 Oct	Finnair	direct
02 Oct - 15 Oct	Finnair	direct
18 Oct - 11 Nov	Finnair	direct
02 Oct - 10 Oct	Finnair	direct
03 Oct - 10 Oct	Finnair	direct

Also check the deals for one-way flights from Bangkok to Helsinki in October.

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 Bangkok to Helsinki in October from 711€

Return flights