Cheapest return flights from Washington to Lisbon in December from $759

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

25 Dec - 08 Jan TAP direct
08 Dec - 22 Dec Air Canada
08 Dec - 22 Dec United direct
11 Dec - 25 Dec United direct
11 Dec - 21 Dec Turkish Airlines
22 Dec - 05 Jan Air Canada
24 Dec - 03 Jan TAP direct
22 Dec - 05 Jan TAP direct

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

Skyscanner

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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