Cheapest one-way flights from London to Cancun in December from $420

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

One-Way flights

04 Dec Brussels Airlines
31 Dec British Airways
03 Dec British Airways
17 Dec Brussels Airlines
06 Dec British Airways
01 Dec British Airways
07 Dec British Airways
25 Dec Brussels Airlines
14 Dec Vueling Airlines
09 Dec KLM

Also check the deals for return flights from London to Cancun in December.

Skyscanner

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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