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

Return flights

26 Sep - 05 Oct	ANA
24 Sep - 24 Oct	Japan Airlines
22 Sep - 07 Oct	Japan Airlines
30 Sep - 07 Oct	Japan Airlines
25 Sep - 02 Oct	Japan Airlines
25 Sep - 30 Sep	LATAM Airlines Group
25 Sep - 11 Oct	LATAM Airlines Group
24 Sep - 01 Oct	LATAM Airlines Group
29 Sep - 15 Oct	Ethiopian Airlines
26 Sep - 03 Oct	LATAM Airlines Group
29 Sep - 06 Oct	LATAM Airlines Group
23 Sep - 30 Sep	LATAM Airlines Group
22 Sep - 29 Sep	LATAM Airlines Group
21 Sep - 28 Sep	LATAM Airlines Group
20 Sep - 27 Sep	LATAM Airlines Group
19 Sep - 26 Sep	LATAM Airlines Group
21 Sep - 30 Sep	LATAM Airlines Group
23 Sep - 29 Sep	LATAM Airlines Group

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.

Book a cheap hotel in Bangkok

Cheap car rent in Bangkok

Cheapest return flights from Sao Paulo to Bangkok in September from $1062

Return flights