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

Return flights

24 Sep - 13 Oct	LATAM Airlines Group
10 Sep - 15 Sep	LATAM Airlines Group
09 Sep - 16 Sep	LATAM Airlines Group
10 Sep - 23 Sep	LATAM Airlines Group
03 Sep - 11 Sep	LATAM Airlines Group
08 Sep - 27 Sep	LATAM Airlines Group
02 Sep - 30 Sep	LATAM Airlines Group
17 Sep - 04 Oct	LATAM Airlines Group
17 Sep - 12 Oct	Azul Airlines
27 Sep - 10 Oct	TAP
06 Sep - 28 Sep	LATAM Airlines Group
27 Sep - 12 Oct	Azul Airlines
26 Sep - 10 Oct	LATAM Airlines Group
17 Sep - 10 Oct	Azul Airlines
23 Sep - 04 Oct	Azul Airlines
05 Sep - 12 Sep	LATAM Airlines Group
01 Sep - 30 Sep	LATAM Airlines Group
01 Sep - 11 Sep	LATAM Airlines Group
30 Sep - 28 Oct	Azul Airlines
15 Sep - 06 Oct	GOL Linhas Aéreas

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 $993

Return flights