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

Return flights

24 Sep - 28 Sep	IndiGo
18 Sep - 28 Sep	IndiGo
17 Sep - 28 Sep	IndiGo
15 Sep - 26 Sep	IndiGo
16 Sep - 26 Sep	IndiGo
20 Sep - 29 Sep	IndiGo
23 Sep - 30 Sep	IndiGo
18 Sep - 29 Sep	IndiGo
21 Sep - 29 Sep	IndiGo
15 Sep - 29 Sep	IndiGo
24 Sep - 01 Oct	IndiGo
27 Sep - 04 Oct	IndiGo
22 Sep - 02 Oct	IndiGo
13 Sep - 19 Oct	Etihad Airways
28 Sep - 11 Oct	IndiGo
20 Sep - 26 Oct	IndiGo
13 Sep - 19 Oct	Thai Airways	direct
21 Sep - 18 Oct	Scandinavian Airlines

Also check the deals for one-way flights from Bangkok to Copenhagen 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 Bangkok to Copenhagen in September from $734

Return flights