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

Return flights

01 Sep - 09 Sep	Air Transat
20 Sep - 25 Sep	Air Transat
21 Sep - 29 Sep	Air Transat
20 Sep - 29 Sep	Air Transat
16 Sep - 25 Sep	Air Transat
14 Sep - 19 Sep	Air Transat
12 Sep - 25 Sep	Air Transat
07 Sep - 17 Sep	Air Transat
06 Sep - 20 Sep	Air Transat
07 Sep - 19 Sep	Air Transat
01 Sep - 18 Oct	Air Transat
07 Sep - 18 Oct	Air Transat
13 Sep - 25 Oct	Air Transat
25 Sep - 02 Oct	Air Transat
04 Sep - 18 Oct	Air Europa
25 Sep - 09 Oct	Air Europa
26 Sep - 01 Oct	Air Transat
04 Sep - 24 Oct	Air Transat
23 Sep - 01 Oct	Air Transat
25 Sep - 02 Oct	TUI	direct

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

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 September from $724

Return flights