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

Return flights

22 Jan - 27 Jan	Aer Lingus
15 Jan - 29 Jan	Aer Lingus
20 Jan - 03 Feb	Aer Lingus
13 Jan - 20 Jan	Aer Lingus
13 Jan - 27 Jan	Aer Lingus
27 Jan - 10 Feb	Aer Lingus
08 Jan - 13 Jan	SWISS
29 Jan - 07 Feb	Aer Lingus
17 Jan - 19 Feb	SWISS
17 Jan - 19 Jan	SWISS
08 Jan - 22 Jan	SWISS
07 Jan - 14 Jan	SWISS
19 Jan - 31 Jan	SWISS
07 Jan - 18 Jan	SWISS
18 Jan - 01 Feb	Air Canada
31 Jan - 10 Feb	Aer Lingus
30 Jan - 13 Feb	Air Canada
30 Jan - 07 Feb	Air Canada
27 Jan - 07 Feb	Aer Lingus
21 Jan - 02 Feb	SWISS

Also check the deals for one-way flights from London to Cancun in January.

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 January from $543

Return flights