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

Return flights

08 Oct - 13 Oct	Air Canada
08 Oct - 05 Nov	Air Canada
03 Oct - 11 Oct	Air Canada
01 Oct - 16 Oct	Air Canada
03 Oct - 07 Oct	Air Canada
03 Oct - 14 Oct	Air Canada
01 Oct - 14 Oct	Air Canada
03 Oct - 18 Oct	Air Canada
01 Oct - 11 Oct	Air Canada
03 Oct - 07 Nov	Air Canada
01 Oct - 07 Oct	Air Canada
08 Oct - 12 Oct	Air Canada
05 Oct - 25 Nov	Air Canada
29 Oct - 14 Nov	Air Canada
29 Oct - 08 Nov	Air Canada
29 Oct - 10 Nov	Air Canada
29 Oct - 09 Nov	Air Canada
06 Oct - 25 Nov	Air Canada
28 Oct - 10 Nov	Lufthansa
30 Oct - 04 Nov	Lufthansa

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

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 October from 574€

Return flights