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

Return flights

28 Oct - 25 Nov	Norse Atlantic Airways
01 Oct - 31 Oct	Air Arabia
23 Oct - 31 Oct	Norse Atlantic Airways
23 Oct - 27 Oct	Norse Atlantic Airways
13 Oct - 29 Oct	KLM
30 Oct - 29 Nov	KLM
13 Oct - 28 Oct	Etihad Airways
16 Oct - 30 Oct	Qatar Airways
10 Oct - 23 Oct	KLM
06 Oct - 19 Oct	Qatar Airways
28 Oct - 25 Nov	Finnair	direct
23 Oct - 31 Oct	Finnair	direct
16 Oct - 30 Oct	Finnair	direct
28 Oct - 04 Nov	Finnair	direct
30 Oct - 29 Nov	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 488€

Return flights