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

Return flights

15 Dec - 31 Dec	Royal Air Maroc
03 Dec - 10 Dec	Royal Air Maroc
15 Dec - 14 Jan	Royal Air Maroc
14 Dec - 14 Jan	Royal Air Maroc
01 Dec - 31 Dec	Royal Air Maroc
01 Dec - 28 Jan	Royal Air Maroc
02 Dec - 08 Dec	Air Canada
04 Dec - 11 Dec	Air Canada
01 Dec - 07 Dec	Air Canada
07 Dec - 21 Jan	Air Canada
10 Dec - 21 Jan	Royal Air Maroc
09 Dec - 20 Jan	Air Canada
10 Dec - 20 Jan	Air Canada
11 Dec - 20 Jan	Air Canada
01 Dec - 29 Jan	Air Canada
02 Dec - 07 Dec	Air Canada
04 Dec - 20 Jan	Air Canada
06 Dec - 10 Dec	British Airways
05 Dec - 07 Dec	Air Canada
12 Dec - 31 Dec	Royal Air Maroc

Also check the deals for one-way flights from London to Sao Paulo in December.

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 December from 707€

Return flights