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

Return flights

19 Aug - 23 Aug	IndiGo
26 Aug - 04 Sep	IndiGo
10 Aug - 31 Aug	IndiGo
22 Aug - 24 Aug	IndiGo
07 Aug - 10 Aug	IndiGo
08 Aug - 16 Aug	IndiGo
27 Aug - 31 Aug	IndiGo
17 Aug - 24 Aug	IndiGo
04 Aug - 09 Aug	IndiGo
01 Aug - 10 Aug	IndiGo
01 Aug - 12 Aug	Qatar Airways
30 Aug - 07 Sep	Finnair	direct
26 Aug - 04 Sep	Finnair	direct

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

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 August from 659€

Return flights