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

Return flights

25 Dec - 10 Jan	TAP
23 Dec - 31 Dec	WORLD2FLY
01 Dec - 06 Dec	Air Canada
19 Dec - 07 Jan	TAP
09 Dec - 16 Dec	United
29 Dec - 12 Jan	Air Canada
26 Dec - 03 Jan	TAP
19 Dec - 18 Jan	Air Canada
24 Dec - 06 Jan	United
19 Dec - 18 Jan	Virgin Atlantic	direct
14 Dec - 30 Dec	Air Canada
15 Dec - 23 Dec	Air Canada
15 Dec - 04 Jan	Condor
19 Dec - 07 Jan	Virgin Atlantic	direct
29 Dec - 05 Jan	United
19 Dec - 26 Dec	United

Also check the deals for one-way flights from Cancun 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 Cancun to London in December from 728€

Return flights