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

Return flights

30 Sep - 07 Oct	GOL Linhas Aéreas
29 Sep - 06 Oct	Air France
24 Sep - 15 Oct	KLM
29 Sep - 31 Oct	Air France
24 Sep - 01 Oct	KLM
23 Sep - 06 Oct	Air France
27 Sep - 05 Oct	Air France
22 Sep - 25 Sep	Air France
29 Sep - 30 Sep	Air France
24 Sep - 10 Oct	KLM
22 Sep - 01 Oct	Air France
22 Sep - 30 Sep	Air France
27 Sep - 03 Oct	Air France
23 Sep - 30 Sep	Air France
27 Sep - 30 Sep	Air France
20 Sep - 30 Sep	Air France
20 Sep - 29 Sep	Air France
26 Sep - 30 Sep	Air France
21 Sep - 29 Sep	Air France
22 Sep - 28 Sep	TAP

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 876€

Return flights