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

Return flights

09 Sep - 16 Sep	Japan Airlines
08 Sep - 15 Sep	Ethiopian Airlines
01 Sep - 15 Sep	Ethiopian Airlines
03 Sep - 11 Sep	Ethiopian Airlines
17 Sep - 06 Oct	Ethiopian Airlines
29 Sep - 13 Oct	Ethiopian Airlines
28 Sep - 13 Oct	Ethiopian Airlines
12 Sep - 18 Sep	Air China
01 Sep - 06 Sep	Ethiopian Airlines
20 Sep - 11 Oct	LATAM Airlines Group
10 Sep - 23 Sep	Ethiopian Airlines
10 Sep - 21 Sep	Ethiopian Airlines
09 Sep - 23 Sep	Ethiopian Airlines
05 Sep - 12 Oct	LATAM Airlines Group
22 Sep - 22 Oct	KLM
15 Sep - 20 Sep	LATAM Airlines Group
16 Sep - 07 Oct	Qatar Airways
22 Sep - 02 Oct	Air France
16 Sep - 06 Oct	Ethiopian Airlines
30 Sep - 07 Oct	Turkish Airlines

Also check the deals for one-way flights from Sao Paulo 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 Sao Paulo to Bangkok in September from 882€

Return flights