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

Return flights

04 May - 11 May	Air Canada
04 May - 18 May	Brussels Airlines
05 May - 10 May	Brussels Airlines
04 May - 13 May	Air Canada
06 May - 10 May	Air Canada
02 May - 21 May	SWISS
13 May - 17 May	Air Canada
01 May - 06 May	SWISS
02 May - 20 May	SWISS
01 May - 07 May	SWISS
18 May - 01 Jun	Avianca
28 May - 01 Jun	Avianca
19 May - 02 Jun	Avianca
20 May - 03 Jun	Avianca
29 May - 26 Jun	British Airways
30 May - 06 Jun	Avianca
31 May - 21 Jun	jetBlue
22 May - 04 Jun	Avianca
30 May - 15 Jun	jetBlue
22 May - 05 Jun	Aer Lingus

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 656€

Return flights