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

Return flights

27 Sep - 27 Oct	SWISS
12 Sep - 28 Sep	Finnair
12 Sep - 21 Sep	Finnair
12 Sep - 22 Sep	Finnair
10 Sep - 29 Sep	Finnair
09 Sep - 28 Sep	Finnair
03 Sep - 14 Sep	Finnair
09 Sep - 22 Sep	Finnair
16 Sep - 28 Sep	Finnair
17 Sep - 29 Sep	Finnair
19 Sep - 29 Sep	Finnair
23 Sep - 07 Oct	Lufthansa
16 Sep - 15 Oct	Lufthansa
11 Sep - 02 Oct	Lufthansa
16 Sep - 07 Oct	Lufthansa
18 Sep - 02 Oct	Austrian Airlines
08 Sep - 13 Oct	Austrian Airlines
23 Sep - 11 Oct	Lufthansa
18 Sep - 16 Oct	Austrian Airlines
24 Sep - 08 Oct	SWISS

Also check the deals for one-way flights from Paris 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 Paris to Bangkok in September from $551

Return flights