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

Return flights

25 Sep - 30 Sep	KLM
18 Sep - 30 Sep	KLM
25 Sep - 07 Oct	KLM
18 Sep - 27 Sep	KLM
21 Sep - 27 Sep	KLM
29 Sep - 14 Oct	KLM
14 Sep - 27 Sep	KLM
29 Sep - 09 Oct	KLM
16 Sep - 23 Sep	KLM
21 Sep - 30 Sep	KLM
30 Sep - 07 Oct	KLM
19 Sep - 27 Sep	KLM
12 Sep - 14 Sep	KLM
30 Sep - 12 Oct	KLM
18 Sep - 28 Sep	KLM
22 Sep - 06 Oct	KLM
30 Sep - 21 Oct	KLM
21 Sep - 01 Oct	KLM
27 Sep - 14 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 621€

Return flights