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

Return flights

07 Sep - 14 Sep	Air China
14 Sep - 23 Sep	Air China
15 Sep - 19 Sep	Air China
04 Sep - 14 Sep	Air China
02 Sep - 09 Sep	Air China
15 Sep - 22 Sep	Air China
03 Sep - 09 Sep	Air China
15 Sep - 28 Sep	Hainan Airlines
11 Sep - 18 Sep	Air China
04 Sep - 17 Sep	Air China
27 Sep - 19 Oct	Air India
22 Sep - 03 Oct	IndiGo
30 Sep - 07 Oct	IndiGo
28 Sep - 26 Oct	Air India
17 Sep - 10 Oct	IndiGo
27 Sep - 18 Oct	Air China
01 Sep - 07 Oct	Air China
26 Sep - 07 Oct	Air China
28 Sep - 11 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 $704

Return flights