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

Return flights

03 Dec - 10 Dec	TAP
02 Dec - 10 Dec	TAP
05 Dec - 07 Dec	Scandinavian Airlines
04 Dec - 11 Dec	TAP
12 Dec - 12 Jan	Icelandair
03 Dec - 07 Dec	TAP
05 Dec - 08 Dec	Icelandair
24 Dec - 17 Jan	TAP
04 Dec - 07 Dec	TAP
08 Dec - 21 Jan	TAP
06 Dec - 12 Dec	Spirit Airlines
08 Dec - 15 Dec	Lufthansa
08 Dec - 14 Dec	Lufthansa
16 Dec - 18 Jan	Scandinavian Airlines
09 Dec - 08 Jan	Air Canada
16 Dec - 10 Jan	Scandinavian Airlines
23 Dec - 17 Jan	Scandinavian Airlines
08 Dec - 15 Jan	TAP
29 Dec - 10 Jan	Air Canada
11 Dec - 08 Jan	SWISS

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 306€

Return flights