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

Return flights

16 Sep - 30 Sep	Vueling Airlines
15 Sep - 20 Oct	TAP
24 Sep - 24 Oct	TAP
01 Sep - 29 Sep	TAP
22 Sep - 19 Oct	TAP
23 Sep - 20 Oct	TAP
15 Sep - 09 Oct	TAP
22 Sep - 09 Oct	TAP
07 Sep - 07 Oct	TAP
16 Sep - 14 Oct	TAP
11 Sep - 14 Oct	TAP
20 Sep - 13 Oct	TAP
08 Sep - 15 Sep	TAP
15 Sep - 25 Sep	easyJet
02 Sep - 25 Sep	TAP
20 Sep - 30 Sep	TAP
15 Sep - 24 Sep	easyJet
06 Sep - 15 Sep	TAP
12 Sep - 29 Sep	TAP
19 Sep - 30 Sep	TAP

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 597€

Return flights