AirHint found the following cheapest return flights from London (LHR) to Rio Negro (MDE) in December 2025 (see full year).

Return flights

03 Dec - 10 Dec	Virgin Atlantic
01 Dec - 08 Dec	TAP
07 Dec - 18 Dec	Vueling Airlines
29 Dec - 26 Jan	Vueling Airlines
01 Dec - 15 Dec	Avianca
01 Dec - 23 Dec	Avianca
01 Dec - 26 Dec	Avianca
14 Dec - 21 Dec	Vueling Airlines
01 Dec - 20 Dec	Vueling Airlines
05 Dec - 08 Dec	Vueling Airlines
05 Dec - 12 Dec	Vueling Airlines
05 Dec - 30 Jan	Vueling Airlines
28 Dec - 18 Jan	Vueling Airlines
29 Dec - 16 Jan	Avianca
28 Dec - 17 Jan	Avianca
29 Dec - 11 Jan	Avianca
26 Dec - 11 Jan	Vueling Airlines
25 Dec - 11 Jan	Vueling Airlines
11 Dec - 01 Jan	Vueling Airlines
12 Dec - 14 Jan	Vueling Airlines

Also check the deals for one-way flights from London to Rio Negro 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 Negro in December from $1012

Return flights