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

Return flights

30 Dec - 14 Jan	jetBlue
28 Dec - 20 Jan	TAP
30 Dec - 13 Jan	TAP
31 Dec - 23 Jan	jetBlue
30 Dec - 31 Jan	KM Malta Airlines
31 Dec - 30 Jan	Air Canada
28 Dec - 15 Jan	TAP
29 Dec - 13 Jan	Air Canada
28 Dec - 18 Jan	TAP
29 Dec - 21 Jan	jetBlue
27 Dec - 31 Dec	TAP
29 Dec - 31 Dec	Finnair

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 863€

Return flights