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

Return flights

31 Dec - 07 Jan	Spirit Airlines
26 Dec - 14 Jan	TAP
29 Dec - 09 Jan	KLM
30 Dec - 09 Jan	Air France
27 Dec - 11 Jan	Spirit Airlines
27 Dec - 08 Jan	SWISS
31 Dec - 07 Jan	Air France	direct
26 Dec - 30 Dec	Scandinavian Airlines
26 Dec - 29 Dec	Scandinavian Airlines
26 Dec - 14 Jan	Air France	direct
27 Dec - 06 Jan	Austrian Airlines
29 Dec - 06 Jan	SWISS
29 Dec - 31 Dec	Lufthansa
26 Dec - 28 Dec	Turkish Airlines
26 Dec - 27 Dec	TAP
26 Dec - 30 Dec	Air France	direct
26 Dec - 29 Dec	Air France	direct
26 Dec - 28 Dec	Air France	direct
29 Dec - 31 Dec	British Airways	direct
26 Dec - 27 Dec	Finnair	direct

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 647€

Return flights