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

Return flights

03 Sep - 28 Sep	IndiGo
10 Sep - 17 Sep	Norwegian
05 Sep - 22 Sep	IndiGo
01 Sep - 16 Sep	IndiGo
18 Sep - 29 Sep	IndiGo
02 Sep - 23 Sep	IndiGo
12 Sep - 21 Sep	IndiGo
08 Sep - 19 Sep	IndiGo
04 Sep - 25 Sep	IndiGo
17 Sep - 29 Sep	Ryanair
03 Sep - 04 Oct	Air India
12 Sep - 05 Oct	Air India
15 Sep - 16 Oct	Air India
05 Sep - 05 Oct	Air India
14 Sep - 02 Oct	Air India
16 Sep - 17 Oct	KLM
02 Sep - 01 Oct	KLM
23 Sep - 07 Oct	Air France
25 Sep - 17 Oct	Air France
25 Sep - 02 Oct	Etihad Airways

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 $652

Return flights