AirHint found the following cheapest return flights from Bangkok (BKK) to Helsinki (HEL) in May 2026 (see full year).

Return flights

25 May - 02 Jun	KLM
27 May - 06 Jun	KLM
28 May - 06 Jun	KLM
25 May - 01 Jun	KLM
20 May - 31 May	KLM
28 May - 05 Jun	KLM
27 May - 05 Jun	KLM
27 May - 07 Jun	KLM
22 May - 30 May	KLM
29 May - 05 Jun	KLM
29 May - 07 Jun	KLM
17 May - 31 May	KLM
10 May - 22 Jun	IndiGo
01 May - 14 May	Oman Air
05 May - 19 May	Lufthansa
04 May - 14 May	Lufthansa
01 May - 14 May	Finnair	direct
17 May - 31 May	Finnair	direct
05 May - 19 May	Finnair	direct
22 May - 30 May	Finnair	direct

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

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 May from $635

Return flights