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

Return flights

01 Dec - 23 Dec	Lufthansa
02 Dec - 20 Jan	Lufthansa
03 Dec - 11 Dec	Lufthansa
30 Dec - 13 Jan	Lufthansa
30 Dec - 15 Jan	Lufthansa
01 Dec - 22 Dec	Lufthansa
03 Dec - 14 Dec	Lufthansa
16 Dec - 13 Jan	Lufthansa
29 Dec - 15 Jan	Lufthansa
29 Dec - 13 Jan	Lufthansa
08 Dec - 15 Dec	Lufthansa
01 Dec - 15 Dec	Lufthansa
05 Dec - 14 Dec	Lufthansa
26 Dec - 13 Jan	Lufthansa
09 Dec - 30 Dec	Lufthansa
15 Dec - 28 Dec	Lufthansa
24 Dec - 13 Jan	Lufthansa
08 Dec - 11 Jan	Delta
05 Dec - 21 Dec	Lufthansa
05 Dec - 06 Jan	Lufthansa

Also check the deals for one-way flights from London to Mexico City 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 Mexico City in December from $756

Return flights