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

Return flights

05 May - 19 May	jetBlue
04 May - 19 May	jetBlue
04 May - 13 May	Air Canada
04 May - 12 May	jetBlue
06 May - 11 May	Air Canada
13 May - 20 May	Air Canada
06 May - 13 May	Air Canada
27 May - 02 Jun	jetBlue
06 May - 21 May	Air Canada
10 May - 19 May	jetBlue
15 May - 19 May	jetBlue
25 May - 04 Jun	jetBlue
25 May - 03 Jun	jetBlue
30 May - 04 Jun	jetBlue
28 May - 03 Jun	jetBlue
31 May - 09 Jun	Avianca
20 May - 03 Jun	Avianca
31 May - 10 Jun	Avianca
26 May - 01 Jun	Avianca
19 May - 01 Jun	Iberia

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 671€

Return flights