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

Return flights

10 Dec - 16 Dec	Wizz Air Malta
12 Dec - 17 Dec	TAROM
31 Dec - 11 Jan	Pegasus Airlines
04 Dec - 14 Dec	Wizz Air Malta
08 Dec - 14 Dec	Norwegian
25 Dec - 05 Jan	TAROM
28 Dec - 13 Jan	Aegean Airlines
16 Dec - 14 Jan	Wizz Air Malta
02 Dec - 12 Dec	SWISS
03 Dec - 10 Dec	SWISS
01 Dec - 15 Dec	SWISS
04 Dec - 08 Dec	SWISS
04 Dec - 16 Dec	SWISS
01 Dec - 10 Dec	SWISS
28 Dec - 10 Jan	Animawings
26 Dec - 16 Jan	TAROM
26 Dec - 13 Jan	TAROM
27 Dec - 10 Jan	TAROM
04 Dec - 13 Jan	British Airways
16 Dec - 06 Jan	TAROM

Also check the deals for one-way flights from Bucharest to Bangkok 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 Bucharest to Bangkok in December from $640

Return flights