Cheapest one-way flights from Washington to Lisbon in December from 296€

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

One-Way flights

07 Dec Royal Air Maroc
14 Dec Frontier Airlines
15 Dec Icelandair
29 Dec Lufthansa
12 Dec Frontier Airlines
06 Dec Lufthansa
29 Dec TAP direct
07 Dec TAP direct
06 Dec TAP direct
15 Dec jetBlue direct

Also check the deals for return flights from Washington to Lisbon in December.

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