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

Return flights

26 Sep - 02 Oct	Avianca
23 Sep - 30 Sep	Avianca
21 Sep - 26 Oct	Avianca
21 Sep - 09 Oct	Avianca
24 Sep - 15 Oct	Avianca
22 Sep - 08 Oct	Avianca
26 Sep - 09 Oct	Avianca
26 Sep - 07 Oct	Avianca
24 Sep - 30 Oct	Avianca
23 Sep - 07 Oct	Avianca
26 Sep - 01 Oct	Avianca
22 Sep - 29 Sep	Avianca
21 Sep - 28 Sep	Avianca
22 Sep - 30 Sep	Avianca
23 Sep - 26 Sep	Vueling Airlines
22 Sep - 27 Sep	Vueling Airlines
20 Sep - 30 Sep	Vueling Airlines
19 Sep - 28 Sep	Vueling Airlines
21 Sep - 23 Sep	Vueling Airlines
19 Sep - 22 Sep	KLM

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.

Book a cheap hotel in Sao Paulo

Cheap car rent in Sao Paulo

Cheapest return flights from London to Sao Paulo in September from $886

Return flights