Cheapest return flights from Washington to Lisbon in December from $524

Best time to book flights for Washington (IAD) to Lisbon (LIS) flights at AirHint

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

Return flights

04 Dec - 11 Dec TAP direct
27 Dec - 31 Dec Scandinavian Airlines
25 Dec - 07 Jan British Airways
20 Dec - 31 Dec British Airways
25 Dec - 07 Jan TAP direct
24 Dec - 31 Dec United direct
14 Dec - 21 Dec United direct
27 Dec - 31 Dec TAP direct
17 Dec - 01 Jan British Airways
20 Dec - 01 Jan British Airways
23 Dec - 04 Jan Lufthansa
23 Dec - 02 Jan Lufthansa
20 Dec - 31 Dec United direct
23 Dec - 03 Jan United
23 Dec - 04 Jan TAP direct
23 Dec - 03 Jan TAP direct
20 Dec - 01 Jan United direct

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

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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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