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

Return flights

07 May - 11 May	SWISS
06 May - 11 May	SWISS
13 May - 17 May	Air Canada
13 May - 20 May	Air Canada
01 May - 22 May	Air Canada
05 May - 19 May	Air Canada
04 May - 14 May	Air Canada
04 May - 15 May	Air Canada
15 May - 20 May	Air Canada
11 May - 21 May	Air Canada
14 May - 14 Jun	Delta
25 May - 01 Jun	Delta
30 May - 09 Jun	Delta
29 May - 12 Jun	Delta
23 May - 06 Jun	Delta
30 May - 05 Jun	SWISS

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 $603

Return flights