AirHint found the following cheapest return flights from Mexico City (MEX) to London (LGW) in December 2025 (see full year).

Return flights

24 Dec - 18 Jan	Aeromexico
30 Dec - 17 Jan	KLM
31 Dec - 26 Jan	Aer Lingus
30 Dec - 19 Jan	Aeromexico
29 Dec - 12 Jan	Air France
30 Dec - 15 Jan	Aeromexico
30 Dec - 18 Jan	Aeromexico
30 Dec - 13 Jan	KLM
25 Dec - 11 Jan	Viva
25 Dec - 10 Jan	Viva
24 Dec - 31 Dec	Iberia
24 Dec - 30 Dec	Iberia
22 Dec - 31 Dec	Volaris
22 Dec - 27 Dec	Volaris
26 Dec - 31 Dec	Volaris
20 Dec - 31 Dec	Viva
18 Dec - 31 Dec	Viva
21 Dec - 31 Dec	Viva
18 Dec - 30 Dec	Viva
20 Dec - 27 Dec	Viva

Also check the deals for one-way flights from Mexico City to London 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 Mexico City to London in December from $878

Return flights