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Cheapest one-way flights from Washington (IAD) to Lisbon (LIS), December

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Dates, airline, and price
Dates	Airline	Price
24 Dec	Iberia
28 Dec	Royal Air Maroc
30 Dec	Royal Air Maroc
16 Dec	Austrian Airlines
26 Dec	Royal Air Maroc
31 Dec	Turkish Airlines
20 Dec	Royal Air Maroc
29 Dec	British Airways
27 Dec	United Direct Flight
28 Dec	United Direct Flight

deals for return flights from Washington to Lisbon in December.

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Updated Jul 15, 2026.

About these fares

These results come from our latest search across airlines for your currency. Prices change quickly and are not locked until you complete booking—always confirm the total and fare rules on the partner site.

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Cheapest one-way flights from Washington (IAD) to Lisbon (LIS), December

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