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

Return flights

01 Sep - 14 Sep	Norse Atlantic Airways (UK)
16 Sep - 07 Oct	TAP
11 Sep - 14 Oct	TAP
16 Sep - 14 Oct	TAP
02 Sep - 21 Oct	TAP
02 Sep - 14 Oct	TAP
09 Sep - 14 Sep	Norse Atlantic Airways (UK)
01 Sep - 30 Sep	TAP
10 Sep - 30 Sep	TAP
17 Sep - 21 Oct	TAP
02 Sep - 07 Oct	TAP
10 Sep - 09 Oct	TAP
15 Sep - 06 Oct	TAP
09 Sep - 30 Sep	TAP
03 Sep - 24 Sep	Vueling Airlines
01 Sep - 04 Oct	TAP
02 Sep - 30 Sep	TAP
18 Sep - 26 Sep	Norse Atlantic Airways (UK)
18 Sep - 28 Sep	Norse Atlantic Airways (UK)
15 Sep - 23 Sep	Norse Atlantic Airways (UK)

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.

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Cheapest return flights from London to Sao Paulo in September from 651€

Return flights