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

Return flights

03 Dec - 28 Jan	TAP
04 Dec - 09 Dec	TAP
02 Dec - 07 Dec	TAP
01 Dec - 10 Dec	TAP
05 Dec - 10 Dec	TAP
05 Dec - 07 Dec	TAP
04 Dec - 14 Dec	TAP
24 Dec - 17 Jan	TAP
04 Dec - 12 Dec	TAP
04 Dec - 29 Jan	FrenchBee
05 Dec - 29 Jan	Icelandair
05 Dec - 11 Dec	Icelandair
13 Dec - 12 Jan	Spirit Airlines
09 Dec - 08 Jan	Frontier Airlines
01 Dec - 11 Dec	Air Canada
13 Dec - 09 Jan	Spirit Airlines
15 Dec - 10 Jan	Spirit Airlines
09 Dec - 14 Dec	TAP
16 Dec - 29 Jan	TAP
10 Dec - 07 Jan	Spirit Airlines

Also check the deals for one-way flights from Miami to London 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 Miami to London in December from $380

Return flights