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

Return flights

27 Oct - 04 Nov	KLM
30 Oct - 06 Nov	KLM
27 Oct - 05 Nov	Lufthansa
05 Oct - 15 Oct	KLM
27 Oct - 12 Nov	Lufthansa
07 Oct - 21 Oct	Delta
30 Oct - 05 Nov	Delta
28 Oct - 04 Nov	Lufthansa
29 Oct - 06 Nov	KLM
27 Oct - 03 Nov	Lufthansa
06 Oct - 14 Oct	Virgin Atlantic
06 Oct - 13 Oct	KLM
06 Oct - 20 Oct	KLM
07 Oct - 14 Oct	Delta
31 Oct - 05 Nov	Lufthansa
29 Oct - 11 Nov	Delta
07 Oct - 13 Oct	KLM
14 Oct - 28 Oct	Lufthansa
07 Oct - 17 Oct	Delta
01 Oct - 28 Oct	SWISS

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 549€

Return flights