AirHint found the following cheapest return flights from Casablanca (CMN) to London (LHR) in September 2025 (see full year).

Return flights

25 Sep - 15 Oct	TAP
25 Sep - 26 Sep	TAP
25 Sep - 30 Sep	TAP
26 Sep - 28 Sep	TAP
22 Sep - 28 Sep	TAP
22 Sep - 11 Oct	TAP
22 Sep - 20 Oct	TAP
24 Sep - 28 Sep	TAP
25 Sep - 10 Oct	TAP
27 Sep - 04 Oct	TAP
20 Sep - 30 Sep	TAP
20 Sep - 27 Sep	TAP
18 Sep - 22 Sep	TAP
20 Sep - 26 Sep	TAP
23 Sep - 05 Oct	Transavia France
19 Sep - 21 Sep	Royal Air Maroc
29 Sep - 14 Oct	TAP
17 Sep - 08 Oct	TAP
30 Sep - 03 Oct	Air France
30 Sep - 10 Oct	Air France

Also check the deals for one-way flights from Casablanca 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 Casablanca to London in September from $249

Return flights