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

Return flights

09 Sep - 20 Sep	Air China
01 Sep - 08 Sep	Ethiopian Airlines
22 Sep - 30 Sep	Qatar Airways
23 Sep - 06 Oct	Air France
23 Sep - 02 Oct	Air France
08 Sep - 13 Oct	Air China
08 Sep - 21 Sep	Air China
02 Sep - 13 Sep	Air China
05 Sep - 21 Sep	Air China
06 Sep - 18 Sep	Ethiopian Airlines
23 Sep - 10 Oct	Air France
15 Sep - 30 Sep	Qatar Airways
16 Sep - 30 Sep	Qatar Airways
17 Sep - 02 Oct	Qatar Airways
01 Sep - 10 Sep	Ethiopian Airlines
23 Sep - 09 Oct	Air France
17 Sep - 04 Oct	Qatar Airways
30 Sep - 08 Oct	Air France
22 Sep - 02 Oct	Air France
22 Sep - 06 Oct	Air France

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 1023€

Return flights