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

Return flights

28 Aug - 04 Sep	Air Canada
28 Aug - 13 Sep	SWISS
27 Aug - 10 Sep	Avianca
28 Aug - 07 Sep	SWISS
20 Aug - 03 Sep	Lufthansa
27 Aug - 03 Sep	Air Canada
06 Aug - 13 Aug	Avianca
07 Aug - 12 Aug	Avianca
01 Aug - 14 Aug	Avianca
06 Aug - 09 Aug	Avianca
03 Aug - 13 Aug	Avianca
02 Aug - 12 Aug	Avianca
06 Aug - 20 Aug	TAP
21 Aug - 25 Aug	SWISS
13 Aug - 27 Aug	Avianca
17 Aug - 24 Aug	Avianca
28 Aug - 01 Sep	Air Canada

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 673€

Return flights