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

Return flights

02 Dec - 07 Dec	Norse Atlantic Airways
20 Dec - 30 Dec	Norse Atlantic Airways
21 Dec - 04 Jan	Norse Atlantic Airways
04 Dec - 11 Dec	Norse Atlantic Airways
04 Dec - 13 Dec	Norse Atlantic Airways
01 Dec - 10 Dec	IndiGo
19 Dec - 16 Jan	IndiGo
17 Dec - 31 Dec	IndiGo
24 Dec - 31 Dec	Qatar Airways
20 Dec - 28 Dec	Qatar Airways
19 Dec - 29 Dec	IndiGo
30 Dec - 05 Jan	Turkish Airlines
26 Dec - 02 Jan	Qatar Airways
26 Dec - 02 Jan	Finnair	direct
21 Dec - 04 Jan	Finnair	direct
30 Dec - 05 Jan	Finnair	direct
04 Dec - 11 Dec	Finnair	direct

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

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 December from $581

Return flights