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

Return flights

06 Dec - 18 Jan	Pegasus Airlines
07 Dec - 12 Jan	Pegasus Airlines
07 Dec - 15 Jan	Pegasus Airlines
09 Dec - 14 Jan	Pegasus Airlines
07 Dec - 14 Jan	Pegasus Airlines
03 Dec - 10 Dec	Austrian Airlines
03 Dec - 11 Dec	Austrian Airlines
06 Dec - 22 Dec	Pegasus Airlines
05 Dec - 18 Dec	Ryanair
04 Dec - 17 Dec	KLM
03 Dec - 23 Dec	KLM
14 Dec - 16 Jan	Ryanair
30 Dec - 18 Jan	LOT
15 Dec - 31 Dec	Air Serbia
31 Dec - 15 Jan	KLM
13 Dec - 15 Jan	Ryanair
07 Dec - 16 Jan	Austrian Airlines
17 Dec - 28 Dec	Aegean Airlines
13 Dec - 27 Dec	LOT
24 Dec - 31 Dec	Lufthansa

Also check the deals for one-way flights from Zagreb 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 Zagreb to Bangkok in December from 519€

Return flights