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

Return flights

14 Sep - 21 Sep	Avianca
11 Sep - 21 Sep	Avianca
29 Sep - 30 Oct	Avianca
11 Sep - 18 Sep	Avianca
14 Sep - 23 Sep	Avianca
14 Sep - 24 Sep	Avianca
14 Sep - 27 Oct	Avianca
24 Sep - 27 Oct	Avianca
28 Sep - 12 Oct	Avianca
28 Sep - 06 Oct	Avianca
29 Sep - 11 Oct	Avianca
11 Sep - 14 Oct	Avianca
11 Sep - 25 Sep	Avianca
29 Sep - 13 Oct	Avianca
22 Sep - 30 Oct	Avianca
26 Sep - 14 Oct	Avianca
23 Sep - 30 Sep	Avianca
24 Sep - 28 Sep	Avianca
25 Sep - 30 Sep	Avianca
11 Sep - 30 Sep	Avianca

Also check the deals for one-way flights from Sao Paulo to London 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 London

Cheap car rent in London

Cheapest return flights from Sao Paulo to London in September from 698€

Return flights