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

Return flights

13 Sep - 16 Sep	Copa
18 Sep - 25 Sep	Ethiopian Airlines
28 Sep - 05 Oct	Ethiopian Airlines
25 Sep - 29 Sep	Copa
24 Sep - 08 Oct	GOL Linhas Aéreas
29 Sep - 02 Oct	Avianca
29 Sep - 11 Oct	Copa
24 Sep - 01 Oct	Copa
10 Sep - 21 Sep	Ethiopian Airlines
21 Sep - 09 Oct	Ethiopian Airlines
21 Sep - 25 Sep	Ethiopian Airlines
28 Sep - 09 Oct	Ethiopian Airlines
22 Sep - 09 Oct	Ethiopian Airlines
27 Sep - 11 Oct	TAP
10 Sep - 15 Sep	Copa
11 Sep - 16 Sep	Avianca
15 Sep - 21 Sep	ITA Airways
21 Sep - 30 Sep	Avianca
22 Sep - 07 Oct	TAAG Angola Airlines
10 Sep - 17 Sep	Copa

Also check the deals for one-way flights from Sao Paulo to London 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 London in September from 778€

Return flights