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

Return flights

24 Dec - 12 Jan	Iberia
25 Dec - 22 Jan	Finnair
26 Dec - 23 Jan	British Airways
24 Dec - 11 Jan	Iberia
26 Dec - 10 Jan	British Airways
24 Dec - 09 Jan	British Airways
25 Dec - 29 Dec	Scandinavian Airlines
24 Dec - 29 Dec	Finnair
17 Dec - 25 Dec	British Airways
17 Dec - 24 Dec	British Airways
23 Dec - 28 Dec	British Airways
24 Dec - 31 Dec	Finnair
25 Dec - 31 Dec	Finnair
26 Dec - 23 Jan	TAP	direct
25 Dec - 30 Dec	British Airways
26 Dec - 10 Jan	TAP	direct
18 Dec - 23 Dec	United
25 Dec - 22 Jan	TAP	direct
16 Dec - 28 Dec	United
24 Dec - 01 Jan	SWISS

Also check the deals for one-way flights from Miami to Lisbon 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 Lisbon in December from $524

Return flights