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

Return flights

15 Sep - 14 Oct	TAP
08 Sep - 30 Sep	TAP
16 Sep - 26 Sep	easyJet
15 Sep - 30 Sep	TAP
19 Sep - 03 Oct	Royal Air Maroc
11 Sep - 30 Sep	TAP
01 Sep - 30 Sep	TAP
08 Sep - 13 Oct	Iberia Express
05 Sep - 03 Oct	Royal Air Maroc
08 Sep - 26 Sep	easyJet
11 Sep - 14 Oct	TAP
08 Sep - 29 Sep	Vueling Airlines
11 Sep - 21 Sep	easyJet
14 Sep - 30 Sep	TAP
11 Sep - 17 Oct	easyJet
11 Sep - 20 Sep	easyJet
09 Sep - 09 Oct	Vueling Airlines
28 Sep - 03 Oct	Royal Air Maroc
06 Sep - 06 Oct	TAP
07 Sep - 04 Oct	Iberia Express

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 $805

Return flights