Cheapest return flights from Washington to Lisbon in December from $1255

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

Return flights

25 Dec - 28 Dec Air Canada
30 Dec - 06 Jan Air Canada
25 Dec - 30 Dec Air Canada
25 Dec - 18 Jan TAP
30 Dec - 04 Jan Air Canada
31 Dec - 04 Jan Air Canada
23 Dec - 26 Dec Air Canada
27 Dec - 01 Jan Air Canada
23 Dec - 27 Dec Air Canada
25 Dec - 01 Jan Air Canada
22 Dec - 31 Dec Air France
26 Dec - 05 Jan Air Canada
28 Dec - 03 Jan Air Canada
27 Dec - 03 Jan Air Canada

Also check the deals for one-way flights from Washington to Lisbon in December.

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