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

Return flights

03 Dec - 10 Dec	Vueling Airlines
02 Dec - 10 Dec	Icelandair
06 Dec - 14 Dec	Icelandair
02 Dec - 14 Dec	Icelandair
03 Dec - 07 Dec	Vueling Airlines
12 Dec - 21 Dec	Iberia For Level
05 Dec - 12 Dec	Vueling Airlines
02 Dec - 17 Dec	Icelandair
05 Dec - 09 Dec	Vueling Airlines
10 Dec - 14 Dec	Iberia For Level
14 Dec - 14 Jan	Vueling Airlines
06 Dec - 10 Jan	Vueling Airlines
15 Dec - 12 Jan	TAP
14 Dec - 13 Jan	TAP
14 Dec - 12 Jan	TAP
13 Dec - 12 Jan	TAP
09 Dec - 07 Jan	Icelandair
10 Dec - 07 Jan	Vueling Airlines
11 Dec - 07 Jan	Icelandair
13 Dec - 10 Jan	Vueling Airlines

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

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 December from $457

Return flights