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

Return flights

21 Sep - 28 Sep	TUI.nl
19 Sep - 22 Sep	TUI fly Belgium
20 Sep - 27 Sep	Flair Airlines
25 Sep - 02 Oct	Flair Airlines
23 Sep - 07 Oct	TUI.nl
25 Sep - 13 Oct	Flair Airlines
17 Sep - 17 Oct	TUI
30 Sep - 07 Oct	TUI.nl
18 Sep - 21 Sep	TUI
22 Sep - 29 Sep	TUI
30 Sep - 26 Oct	TUI.nl
25 Sep - 07 Oct	Flair Airlines
23 Sep - 30 Sep	TUI.nl
19 Sep - 21 Sep	Air Transat
19 Sep - 29 Sep	TUI
27 Sep - 01 Oct	TUI
27 Sep - 04 Oct	TUI
20 Sep - 21 Sep	TUI
21 Sep - 05 Oct	WestJet
18 Sep - 30 Sep	TUI

Also check the deals for one-way flights from Cancun to London 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 Cancun to London in September from 602€

Return flights