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

Return flights

29 Sep - 26 Oct	TAP
23 Sep - 29 Sep	TAP
24 Sep - 14 Oct	TAP
23 Sep - 27 Oct	TAP
24 Sep - 05 Oct	TAP
11 Sep - 17 Sep	LATAM Airlines Group
15 Sep - 12 Oct	TAP
15 Sep - 01 Oct	TAP
11 Sep - 21 Sep	TAP
22 Sep - 29 Sep	TAP
11 Sep - 28 Sep	TAP
09 Sep - 26 Oct	TAP
03 Sep - 14 Sep	TAP
02 Sep - 14 Sep	TAP
19 Sep - 10 Oct	TAP
02 Sep - 09 Sep	TAP
03 Sep - 11 Sep	TAP
10 Sep - 14 Sep	TAP
03 Sep - 02 Oct	TAP
15 Sep - 27 Oct	TAP

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 $1078

Return flights