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

Return flights

01 Sep - 08 Sep	TUI	direct
02 Sep - 16 Sep	TUI	direct
08 Sep - 15 Sep	TUI	direct
09 Sep - 16 Sep	TUI	direct
05 Sep - 16 Sep	TUI	direct
02 Sep - 09 Sep	TUI	direct
08 Sep - 08 Oct	Norse Atlantic Airways (UK)
16 Sep - 30 Sep	TUI	direct
16 Sep - 23 Sep	TUI	direct
11 Sep - 18 Sep	TUI	direct
14 Sep - 21 Sep	TUI	direct
21 Sep - 05 Oct	Norse Atlantic Airways (UK)
20 Sep - 04 Oct	Norse Atlantic Airways (UK)
24 Sep - 01 Oct	British Airways	direct
22 Sep - 05 Oct	British Airways	direct
26 Sep - 07 Oct	TUI
26 Sep - 12 Oct	TUI
16 Sep - 07 Oct	TUI
15 Sep - 07 Oct	TUI
18 Sep - 07 Oct	TUI

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 442€

Return flights