AirHint found the following cheapest return flights from London (LON) to Rio De Janeiro (GIG) in September 2025 (see full year).

Return flights

24 Sep - 14 Oct	ITA Airways
23 Sep - 14 Oct	ITA Airways
22 Sep - 08 Oct	Avianca
25 Sep - 08 Oct	Avianca
23 Sep - 02 Oct	ITA Airways
24 Sep - 01 Oct	ITA Airways
23 Sep - 15 Oct	ITA Airways
30 Sep - 17 Oct	ITA Airways
23 Sep - 12 Oct	ITA Airways
29 Sep - 06 Oct	Delta
20 Sep - 28 Sep	Norse Atlantic Airways (UK)
21 Sep - 28 Sep	Norse Atlantic Airways (UK)
20 Sep - 27 Sep	Norse Atlantic Airways (UK)
22 Sep - 24 Sep	Norse Atlantic Airways (UK)
24 Sep - 26 Sep	Norse Atlantic Airways (UK)
25 Sep - 30 Sep	Ryanair
18 Sep - 23 Sep	easyJet
23 Sep - 30 Sep	Air France
21 Sep - 30 Sep	ITA Airways
23 Sep - 28 Sep	Ryanair

Also check the deals for one-way flights from London to Rio De Janeiro 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 Rio De Janeiro in September from $881

Return flights