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

Return flights

02 Dec - 19 Dec	Pegasus Airlines
01 Dec - 15 Dec	Turkish Airlines
06 Dec - 21 Dec	Turkish Airlines
03 Dec - 17 Jan	Turkish Airlines
02 Dec - 28 Jan	Turkish Airlines
01 Dec - 18 Jan	Turkish Airlines
03 Dec - 19 Dec	Pegasus Airlines
30 Dec - 14 Jan	Eurowings
03 Dec - 20 Dec	Lufthansa
10 Dec - 24 Dec	Lufthansa
02 Dec - 20 Dec	Lufthansa
13 Dec - 29 Dec	Lufthansa
29 Dec - 16 Jan	Turkish Airlines
14 Dec - 26 Dec	Lufthansa
27 Dec - 28 Jan	Turkish Airlines
19 Dec - 01 Jan	Pegasus Airlines
04 Dec - 06 Jan	Lufthansa
21 Dec - 01 Jan	Turkish Airlines
14 Dec - 09 Jan	Turkish Airlines

Also check the deals for one-way flights from Cologne 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 Cologne to Bangkok in December from $729

Return flights