AirHint found the following cheapest return flights from Copenhagen (CPH) to Bangkok (BKK) in September 2025 (see full year).

Return flights

12 Sep - 14 Sep	Air China
10 Sep - 12 Sep	Air China
01 Sep - 23 Sep	IndiGo
01 Sep - 22 Sep	IndiGo
09 Sep - 16 Sep	IndiGo
10 Sep - 23 Sep	IndiGo
15 Sep - 22 Sep	IndiGo
03 Sep - 26 Sep	IndiGo
22 Sep - 29 Sep	IndiGo
08 Sep - 29 Sep	IndiGo
26 Sep - 31 Oct	Pegasus Airlines
27 Sep - 31 Oct	Austrian Airlines
04 Sep - 31 Oct	Air China
29 Sep - 28 Oct	Scandinavian Airlines
02 Sep - 01 Oct	IndiGo
22 Sep - 06 Oct	IndiGo
16 Sep - 16 Oct	IndiGo
12 Sep - 05 Oct	IndiGo
25 Sep - 16 Oct	Etihad Airways
10 Sep - 03 Oct	IndiGo

Also check the deals for one-way flights from Copenhagen to Bangkok in September.

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 Copenhagen to Bangkok in September from 542€

Return flights