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

Return flights

29 Sep - 06 Oct	Iberia
23 Sep - 30 Sep	Iberia
22 Sep - 13 Oct	Iberia
11 Sep - 22 Sep	Royal Air Maroc
25 Sep - 05 Oct	Iberia
08 Sep - 20 Sep	Iberia
16 Sep - 01 Oct	Royal Air Maroc
15 Sep - 22 Sep	Iberia
02 Sep - 14 Sep	Iberia
18 Sep - 03 Oct	Royal Air Maroc
18 Sep - 28 Sep	Royal Air Maroc
18 Sep - 08 Oct	Royal Air Maroc
08 Sep - 22 Sep	Royal Air Maroc
05 Sep - 20 Sep	Iberia
17 Sep - 08 Oct	Iberia
14 Sep - 28 Sep	Iberia
17 Sep - 30 Sep	Iberia
22 Sep - 07 Oct	LATAM Airlines Group
21 Sep - 07 Oct	Iberia
21 Sep - 01 Oct	Iberia

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 $853

Return flights