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

Return flights

31 Dec - 29 Jan	ITA Airways
31 Dec - 26 Jan	ITA Airways
31 Dec - 20 Jan	Ryanair
29 Dec - 23 Jan	ITA Airways
28 Dec - 25 Jan	Ryanair
28 Dec - 19 Jan	easyJet
30 Dec - 20 Jan	easyJet
31 Dec - 18 Jan	easyJet
29 Dec - 19 Jan	easyJet
26 Dec - 22 Jan	Ryanair
29 Dec - 31 Dec	easyJet
26 Dec - 30 Dec	Ryanair
27 Dec - 29 Dec	easyJet
26 Dec - 31 Dec	Iberia Express
27 Dec - 30 Dec	easyJet
27 Dec - 31 Dec	easyJet
26 Dec - 28 Dec	Iberia Express
27 Dec - 28 Dec	Ryanair
30 Dec - 30 Dec	TAP
29 Dec - 31 Dec	British Airways	direct

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 $969

Return flights