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

Return flights

09 Sep - 20 Sep	Ryanair
10 Sep - 18 Sep	Ryanair
09 Sep - 14 Sep	Ryanair
09 Sep - 17 Sep	Ryanair
09 Sep - 23 Sep	Ryanair
19 Sep - 26 Sep	Ryanair
09 Sep - 15 Sep	Ryanair
16 Sep - 24 Sep	Ryanair
10 Sep - 14 Sep	Ryanair
09 Sep - 18 Sep	Ryanair
17 Sep - 07 Oct	Ryanair
10 Sep - 03 Oct	Ryanair
18 Sep - 08 Oct	Ryanair
15 Sep - 02 Oct	Ryanair
20 Sep - 03 Oct	Ryanair
22 Sep - 03 Oct	easyJet
20 Sep - 02 Oct	Ryanair
17 Sep - 09 Oct	Ryanair
20 Sep - 18 Oct	Ryanair
20 Sep - 01 Oct	Ryanair

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 584€

Return flights