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

Return flights

30 Aug - 09 Sep	Virgin Atlantic
27 Aug - 03 Sep	Virgin Atlantic
22 Aug - 06 Sep	SWISS
21 Aug - 25 Aug	Lufthansa
20 Aug - 28 Aug	Delta
19 Aug - 28 Aug	Delta
21 Aug - 28 Aug	Delta
29 Aug - 09 Sep	Virgin Atlantic
23 Aug - 28 Aug	Delta
22 Aug - 28 Aug	Delta
27 Aug - 30 Sep	Virgin Atlantic
23 Aug - 27 Aug	Delta
28 Aug - 03 Sep	Virgin Atlantic
26 Aug - 02 Sep	Virgin Atlantic
21 Aug - 02 Sep	Virgin Atlantic
20 Aug - 04 Sep	Virgin Atlantic
20 Aug - 27 Aug	Virgin Atlantic
15 Aug - 23 Aug	SWISS
28 Aug - 02 Sep	Virgin Atlantic
16 Aug - 18 Aug	KLM

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

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.

Book a cheap hotel in Cancun

Cheap car rent in Cancun

Cheapest return flights from London to Cancun in August from $921

Return flights