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

Return flights

27 Jan - 10 Feb	Aer Lingus
20 Jan - 27 Jan	Aer Lingus
20 Jan - 03 Feb	Aer Lingus
22 Jan - 05 Feb	Aer Lingus
27 Jan - 03 Feb	Aer Lingus
29 Jan - 05 Feb	Aer Lingus
22 Jan - 29 Jan	Aer Lingus
27 Jan - 05 Feb	Aer Lingus
08 Jan - 05 Feb	Aer Lingus
08 Jan - 20 Jan	Aer Lingus
08 Jan - 15 Jan	Aer Lingus
08 Jan - 13 Jan	Aer Lingus
24 Jan - 03 Feb	Aer Lingus
19 Jan - 24 Jan	SWISS
17 Jan - 27 Jan	Aer Lingus
20 Jan - 31 Jan	Aer Lingus
06 Jan - 13 Jan	Aer Lingus
24 Jan - 07 Feb	Aer Lingus
06 Jan - 15 Jan	Aer Lingus
27 Jan - 09 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 484€

Return flights