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

Return flights

03 Dec - 07 Dec	TAP	direct
02 Dec - 09 Dec	TAP	direct
30 Dec - 06 Jan	SWISS
14 Dec - 28 Dec	Virgin Atlantic
12 Dec - 19 Dec	TAP	direct
25 Dec - 28 Dec	Lufthansa
14 Dec - 28 Dec	TAP	direct
20 Dec - 31 Dec	Air Canada
30 Dec - 06 Jan	TAP	direct
30 Dec - 04 Jan	Scandinavian Airlines
19 Dec - 28 Dec	Delta
22 Dec - 29 Dec	United
20 Dec - 31 Dec	TAP	direct
19 Dec - 03 Jan	Iberia
30 Dec - 04 Jan	TAP	direct
26 Dec - 03 Jan	TAP	direct
19 Dec - 03 Jan	TAP	direct

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 $424

Return flights