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

Return flights

04 Dec - 15 Dec	Austrian Airlines
08 Dec - 15 Jan	Air France
07 Dec - 15 Jan	Air France
09 Dec - 17 Jan	Etihad Airways
08 Dec - 09 Dec	Austrian Airlines
01 Dec - 11 Dec	Air France
08 Dec - 09 Jan	Etihad Airways
09 Dec - 13 Jan	Etihad Airways
09 Dec - 14 Jan	Etihad Airways
08 Dec - 13 Jan	Etihad Airways
10 Dec - 15 Jan	Air France
11 Dec - 16 Jan	Air Serbia
10 Dec - 17 Jan	Etihad Airways
01 Dec - 10 Dec	Qatar Airways
12 Dec - 22 Dec	Austrian Airlines

Also check the deals for one-way flights from Belgrade 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 Belgrade to Bangkok in December from $716

Return flights