AirHint found the following cheapest return flights from London (LHR) to Sao Paulo (GRU) in September 2026 (see full year).

Return flights

10 Sep - 30 Sep	British Airways
20 Sep - 30 Sep	Royal Air Maroc
06 Sep - 22 Sep	British Airways
04 Sep - 25 Sep	Iberia
23 Sep - 19 Oct	Avianca
01 Sep - 15 Oct	Austrian Airlines
06 Sep - 13 Sep	British Airways
10 Sep - 13 Sep	British Airways
05 Sep - 16 Sep	British Airways
05 Sep - 11 Sep	British Airways
01 Sep - 01 Oct	Lufthansa
18 Sep - 28 Sep	Avianca
15 Sep - 22 Sep	Avianca
30 Sep - 30 Oct	Avianca
30 Sep - 17 Oct	Avianca
18 Sep - 02 Oct	Avianca
20 Sep - 04 Oct	Avianca
21 Sep - 05 Oct	Avianca
22 Sep - 06 Oct	Avianca
23 Sep - 07 Oct	Avianca

Also check the deals for one-way flights from London to Sao Paulo 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 London to Sao Paulo in September from 691€

Return flights