AirHint found the following cheapest return flights from London (LCY) to Havana (HAV) in September 2025 (see full year).

Return flights

30 Sep - 14 Oct	KLM
16 Sep - 23 Sep	KLM
12 Sep - 23 Sep	KLM
20 Sep - 11 Oct	KLM
15 Sep - 25 Sep	KLM
18 Sep - 25 Sep	KLM
02 Sep - 09 Sep	KLM
24 Sep - 30 Sep	KLM
02 Sep - 08 Oct	KLM
15 Sep - 24 Sep	KLM
10 Sep - 24 Sep	KLM
10 Sep - 22 Sep	KLM
20 Sep - 04 Oct	KLM
06 Sep - 13 Sep	KLM
27 Sep - 04 Oct	KLM
24 Sep - 01 Oct	KLM
14 Sep - 28 Oct	KLM

Also check the deals for one-way flights from London to Havana 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 Havana in September from 722€

Return flights