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

Return flights

02 Sep - 14 Oct	KLM
02 Sep - 21 Oct	KLM
08 Sep - 17 Oct	KLM
23 Sep - 21 Oct	TAP
22 Sep - 19 Oct	TAP
23 Sep - 20 Oct	TAP
15 Sep - 20 Oct	TAP
24 Sep - 24 Oct	TAP
01 Sep - 29 Sep	TAP
12 Sep - 11 Oct	TAP
07 Sep - 07 Oct	TAP
19 Sep - 30 Sep	TAP
21 Sep - 29 Sep	TAP
24 Sep - 30 Sep	TAP
15 Sep - 30 Sep	TAP
01 Sep - 30 Sep	TAP
20 Sep - 30 Sep	TAP
02 Sep - 25 Sep	TAP
24 Sep - 29 Sep	TAP
25 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.

Book a cheap hotel in Sao Paulo

Cheap car rent in Sao Paulo

Cheapest return flights from London to Sao Paulo in September from 652€

Return flights