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

Return flights

09 May - 19 May	SWISS
09 May - 16 May	SWISS
02 May - 10 May	SWISS
02 May - 08 May	SWISS
01 May - 17 May	SWISS
01 May - 07 May	SWISS
01 May - 05 May	SWISS
01 May - 09 May	SWISS
05 May - 10 May	SWISS
01 May - 08 May	SWISS
07 May - 08 Jun	Finnair
26 May - 02 Jun	American Airlines
21 May - 04 Jun	American Airlines
21 May - 01 Jun	American Airlines
20 May - 03 Jun	American Airlines
18 May - 04 Jun	Avianca
25 May - 08 Jun	Finnair
25 May - 01 Jun	Avianca
28 May - 03 Jun	Air Canada
30 May - 07 Jun	American Airlines

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

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 May from 549€

Return flights