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

Return flights

01 Dec - 25 Dec	Pegasus Airlines
05 Dec - 19 Dec	AJet
02 Dec - 16 Dec	AJet
06 Dec - 21 Dec	Turkish Airlines
02 Dec - 12 Dec	AJet
08 Dec - 14 Dec	Ryanair
09 Dec - 22 Dec	Lufthansa
09 Dec - 28 Dec	Lufthansa
09 Dec - 23 Dec	Lufthansa
10 Dec - 24 Dec	Pegasus Airlines
07 Dec - 12 Jan	Pegasus Airlines
31 Dec - 23 Jan	Lufthansa
30 Dec - 16 Jan	Austrian Airlines
05 Dec - 11 Jan	AJet
02 Dec - 10 Jan	AJet
10 Dec - 04 Jan	Pegasus Airlines
31 Dec - 21 Jan	Turkish Airlines
30 Dec - 17 Jan	Turkish Airlines
31 Dec - 17 Jan	Turkish Airlines
23 Dec - 05 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 570€

Return flights