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

Return flights

16 Sep - 24 Sep	HK Express
12 Sep - 22 Sep	Air China
15 Sep - 22 Sep	Air China
17 Sep - 23 Sep	Air China
15 Sep - 23 Sep	Air China
05 Sep - 10 Sep	Air China
05 Sep - 12 Sep	Air China
15 Sep - 28 Sep	Hainan Airlines
04 Sep - 17 Sep	Air China
17 Sep - 24 Sep	Air China
30 Sep - 07 Oct	IndiGo
28 Sep - 26 Oct	Air India
27 Sep - 03 Oct	Air India
24 Sep - 11 Oct	IndiGo
23 Sep - 11 Oct	IndiGo
30 Sep - 06 Oct	Scandinavian Airlines
26 Sep - 07 Oct	Air China

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 557€

Return flights