AirHint found the following cheapest return flights from Sao Paulo (GRU) to London (STN) in September 2026 (see full year).

Return flights

11 Sep - 21 Sep	Royal Air Maroc
21 Sep - 01 Oct	Avianca
25 Sep - 12 Oct	Royal Air Maroc
11 Sep - 24 Sep	Royal Air Maroc
30 Sep - 29 Oct	LATAM Airlines Group
11 Sep - 23 Sep	Royal Air Maroc
15 Sep - 29 Sep	Royal Air Maroc
15 Sep - 25 Sep	Avianca
03 Sep - 16 Sep	Avianca
09 Sep - 21 Sep	Royal Air Maroc
21 Sep - 27 Sep	Air China
09 Sep - 27 Sep	Avianca
14 Sep - 28 Sep	Avianca
14 Sep - 01 Oct	Avianca
22 Sep - 13 Oct	Avianca
30 Sep - 15 Oct	Royal Air Maroc
18 Sep - 09 Oct	Royal Air Maroc
10 Sep - 07 Oct	Avianca
11 Sep - 06 Oct	Avianca
23 Sep - 07 Oct	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.

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Cheapest return flights from Sao Paulo to London in September from $863

Return flights