AirHint found the following cheapest return flights from Dallas-Fort Worth (DFW) to Lisbon (LIS) in December 2025 (see full year).

Return flights

05 Dec - 14 Dec	British Airways
14 Dec - 22 Dec	Air Canada
28 Dec - 12 Jan	KLM
24 Dec - 31 Dec	British Airways
24 Dec - 05 Jan	British Airways
26 Dec - 17 Jan	Finnair
22 Dec - 29 Dec	British Airways
23 Dec - 31 Dec	British Airways
23 Dec - 30 Dec	British Airways
24 Dec - 04 Jan	British Airways
19 Dec - 10 Jan	Iberia
19 Dec - 31 Dec	Iberia
18 Dec - 10 Jan	Finnair
23 Dec - 04 Jan	British Airways
24 Dec - 01 Jan	British Airways
23 Dec - 05 Jan	KLM
24 Dec - 02 Jan	Finnair

Also check the deals for one-way flights from Dallas-Fort Worth 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 Dallas-Fort Worth to Lisbon in December from $552

Return flights