AirHint found the following cheapest return flights from London (LCY) to Cancun (CUN) in December 2026 (see full year).

Return flights

02 Dec - 10 Dec	Virgin Atlantic
07 Dec - 17 Dec	Virgin Atlantic
02 Dec - 09 Dec	KLM
10 Dec - 24 Dec	SWISS
09 Dec - 16 Dec	Air Dolomiti
03 Dec - 12 Dec	Air Dolomiti
01 Dec - 09 Dec	SWISS
06 Dec - 13 Dec	KLM
16 Dec - 22 Dec	KLM
13 Dec - 31 Dec	KLM
17 Dec - 07 Jan	Aer Lingus
26 Dec - 07 Jan	Aer Lingus
23 Dec - 07 Jan	KLM
24 Dec - 07 Jan	Aer Lingus
26 Dec - 09 Jan	Aer Lingus
29 Dec - 09 Jan	Aer Lingus
29 Dec - 14 Jan	Air Dolomiti
19 Dec - 09 Jan	Aer Lingus
28 Dec - 06 Jan	KLM
23 Dec - 05 Jan	KLM

Also check the deals for one-way flights from London to Cancun 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 Cancun in December from 730€

Return flights