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

Return flights

09 Dec - 16 Dec	Air Canada
08 Dec - 16 Dec	Air Canada
09 Dec - 19 Dec	American Airlines
31 Dec - 11 Jan	Delta
30 Dec - 08 Jan	Iberia
02 Dec - 27 Dec	United
12 Dec - 19 Dec	British Airways
01 Dec - 27 Dec	United
08 Dec - 11 Dec	Iberia
24 Dec - 17 Jan	Air France
06 Dec - 27 Dec	United
07 Dec - 27 Dec	United
24 Dec - 11 Jan	Delta
15 Dec - 10 Jan	Finnair
23 Dec - 17 Jan	Finnair
05 Dec - 27 Dec	Finnair
21 Dec - 10 Jan	Finnair
23 Dec - 05 Jan	Finnair
30 Dec - 07 Jan	American Airlines
24 Dec - 05 Jan	Air France

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 $487

Return flights