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

Return flights

20 Aug - 22 Sep	Turkish Airlines
30 Aug - 27 Sep	Lufthansa
20 Aug - 25 Sep	Eurowings
20 Aug - 20 Sep	Turkish Airlines
21 Aug - 24 Aug	Turkish Airlines
21 Aug - 05 Sep	Turkish Airlines
18 Aug - 31 Aug	Eurowings
25 Aug - 14 Sep	Eurowings
17 Aug - 02 Sep	AJet
28 Aug - 31 Aug	Eurowings
29 Aug - 01 Sep	Ryanair
14 Aug - 31 Aug	Eurowings
22 Aug - 27 Aug	Ryanair
10 Aug - 13 Aug	AJet
22 Aug - 05 Sep	Ryanair
14 Aug - 17 Aug	Eurowings
09 Aug - 24 Aug	AJet
15 Aug - 31 Aug	Eurowings
22 Aug - 25 Aug	Ryanair
29 Aug - 03 Sep	Ryanair

Also check the deals for one-way flights from Cologne to Bangkok in August.

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 August from $681

Return flights