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

Return flights

26 Sep - 10 Oct	Azul Airlines
30 Sep - 14 Oct	Azul Airlines
03 Sep - 10 Sep	Azul Airlines
15 Sep - 22 Sep	Azul Airlines
22 Sep - 05 Oct	LATAM Airlines Group
02 Sep - 30 Sep	GOL Linhas Aéreas
09 Sep - 27 Sep	LATAM Airlines Group
09 Sep - 25 Sep	Azul Airlines
03 Sep - 11 Sep	LATAM Airlines Group
02 Sep - 05 Sep	LATAM Airlines Group
17 Sep - 29 Sep	Emirates
09 Sep - 28 Sep	Azul Airlines
08 Sep - 26 Sep	Azul Airlines
19 Sep - 06 Oct	Emirates

Also check the deals for one-way flights from Rio De Janeiro 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 Rio De Janeiro to London in September from $1090

Return flights