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

Return flights

26 Dec - 15 Jan	Air Canada
26 Dec - 13 Jan	Air Canada
26 Dec - 18 Jan	Air Canada
27 Dec - 24 Jan	Air Canada
29 Dec - 16 Jan	Lufthansa
29 Dec - 19 Jan	Lufthansa
27 Dec - 16 Jan	Lufthansa
26 Dec - 17 Jan	Lufthansa
26 Dec - 11 Jan	Air Canada
26 Dec - 10 Jan	Air Canada
26 Dec - 29 Dec	United
26 Dec - 30 Dec	Air France
27 Dec - 30 Dec	Finnair
24 Dec - 31 Dec	ITA Airways
25 Dec - 29 Dec	KLM
23 Dec - 29 Dec	Ryanair
24 Dec - 27 Dec	Aeromexico	direct
25 Dec - 29 Dec	Aeromexico	direct
22 Dec - 27 Dec	Ryanair
21 Dec - 25 Dec	Ryanair

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 626€

Return flights