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

Return flights

03 Dec - 06 Dec	easyJet
03 Dec - 09 Dec	easyJet
02 Dec - 09 Dec	Ryanair
03 Dec - 10 Dec	Air France
01 Dec - 10 Dec	Air France
01 Dec - 11 Dec	Ryanair
05 Dec - 08 Dec	Ryanair
06 Dec - 11 Dec	Ryanair
07 Dec - 11 Dec	easyJet
06 Dec - 09 Dec	Ryanair
30 Dec - 30 Jan	Ryanair
06 Dec - 23 Jan	Ryanair
31 Dec - 23 Jan	Delta
31 Dec - 18 Jan	Delta
31 Dec - 15 Jan	Delta
30 Dec - 20 Jan	Ryanair
30 Dec - 27 Jan	Ryanair
31 Dec - 14 Jan	Delta
29 Dec - 26 Jan	Finnair
29 Dec - 27 Jan	Finnair

Also check the deals for one-way flights from London to Rio De Janeiro 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 Rio De Janeiro in December from 670€

Return flights