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

Return flights

26 Aug - 09 Sep	SWISS
29 Aug - 10 Sep	SWISS
29 Aug - 14 Sep	SWISS
31 Aug - 22 Sep	SWISS
06 Aug - 11 Aug	Delta
25 Aug - 09 Sep	SWISS
29 Aug - 08 Sep	SWISS
29 Aug - 02 Sep	SWISS
31 Aug - 11 Sep	SWISS
26 Aug - 02 Sep	SWISS
31 Aug - 21 Sep	SWISS
05 Aug - 12 Aug	Delta
20 Aug - 25 Aug	SWISS
15 Aug - 25 Aug	SWISS
22 Aug - 25 Aug	SWISS
21 Aug - 25 Aug	SWISS
20 Aug - 24 Aug	SWISS
07 Aug - 14 Aug	Iberia
22 Aug - 24 Aug	SWISS
19 Aug - 25 Aug	SWISS

Also check the deals for one-way flights from London to Miami in August.

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 August from $615

Return flights