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

Return flights

01 Dec - 11 Dec	KLM
03 Dec - 07 Dec	Iberia
03 Dec - 07 Dec	TAP	direct
10 Dec - 20 Dec	Iberia
07 Dec - 20 Dec	Virgin Atlantic
08 Dec - 15 Dec	TAP	direct
23 Dec - 30 Dec	United
25 Dec - 06 Jan	KLM
21 Dec - 05 Jan	United
24 Dec - 29 Dec	Scandinavian Airlines
27 Dec - 03 Jan	SWISS
23 Dec - 30 Dec	TAP	direct
20 Dec - 28 Dec	Delta
25 Dec - 02 Jan	Delta
25 Dec - 04 Jan	FrenchBee
18 Dec - 02 Jan	Delta
25 Dec - 02 Jan	TAP	direct
18 Dec - 02 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 329€

Return flights