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

Return flights

19 Sep - 29 Sep	easyJet
24 Sep - 13 Oct	easyJet
17 Sep - 21 Oct	easyJet
10 Sep - 26 Sep	easyJet
02 Sep - 21 Oct	easyJet
09 Sep - 26 Sep	Ryanair
03 Sep - 24 Oct	easyJet
24 Sep - 08 Oct	easyJet
08 Sep - 22 Sep	Ryanair
23 Sep - 06 Oct	easyJet
08 Sep - 25 Sep	Ryanair
09 Sep - 25 Sep	Ryanair
10 Sep - 22 Sep	Ryanair
20 Sep - 13 Oct	easyJet
18 Sep - 24 Sep	easyJet
11 Sep - 26 Sep	easyJet
01 Sep - 30 Sep	easyJet
25 Sep - 06 Oct	easyJet
23 Sep - 01 Oct	easyJet
22 Sep - 06 Oct	easyJet

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 757€

Return flights