Cheapest return flights from Washington to Lisbon in December from $871

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

06 Dec - 13 Dec TAP direct
26 Dec - 18 Jan British Airways
16 Dec - 23 Dec United direct
26 Dec - 18 Jan TAP direct
26 Dec - 02 Jan United
23 Dec - 02 Jan Icelandair
23 Dec - 02 Jan TAP direct
26 Dec - 02 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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