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

Return flights

25 Sep - 07 Oct	Iberia
29 Sep - 06 Oct	Iberia
27 Sep - 25 Oct	British Airways
21 Sep - 15 Oct	LATAM Airlines Group
27 Sep - 25 Oct	LATAM Airlines Group	direct
26 Sep - 05 Oct	Iberia
23 Sep - 18 Oct	LATAM Airlines Group
15 Sep - 07 Oct	Iberia
25 Sep - 05 Oct	Iberia
25 Sep - 15 Oct	Iberia
11 Sep - 21 Sep	Iberia
14 Sep - 21 Sep	Iberia
06 Sep - 13 Sep	Iberia
06 Sep - 17 Sep	Iberia
07 Sep - 14 Sep	Iberia
02 Sep - 13 Sep	Avianca
08 Sep - 23 Sep	Iberia
16 Sep - 25 Sep	GOL Linhas Aéreas
11 Sep - 18 Sep	Iberia
22 Sep - 29 Sep	British Airways	direct

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 $821

Return flights