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

Return flights

24 Sep - 30 Sep	SWISS
24 Sep - 29 Sep	SWISS
24 Sep - 08 Oct	SWISS
19 Sep - 22 Sep	ITA Airways
21 Sep - 06 Oct	ITA Airways
26 Sep - 29 Sep	SWISS
20 Sep - 22 Sep	ITA Airways
26 Sep - 03 Oct	Delta
22 Sep - 06 Oct	ITA Airways
22 Sep - 29 Sep	ITA Airways
19 Sep - 21 Sep	ITA Airways
26 Sep - 09 Oct	SWISS
20 Sep - 15 Oct	ITA Airways
23 Sep - 30 Sep	ITA Airways
30 Sep - 22 Oct	SWISS
26 Sep - 01 Oct	SWISS
21 Sep - 29 Sep	ITA Airways
20 Sep - 29 Sep	ITA Airways
25 Sep - 09 Oct	SWISS
24 Sep - 01 Oct	SWISS

Also check the deals for one-way flights from London to Miami 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 Miami in September from $538

Return flights