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

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Dates, airline, and price
Dates	Airline	Price
10 Aug	Breeze Airways
11 Aug	Frontier Airlines
26 Aug	Icelandair
13 Aug	Icelandair
25 Aug	Icelandair
30 Aug	Porter Airlines (Canada) Ltd
31 Aug	Porter Airlines (Canada) Ltd
22 Aug	Icelandair
14 Aug	Breeze Airways
29 Aug	Porter Airlines (Canada) Ltd

deals for return flights from Washington to Lisbon in August.

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Updated Jul 13, 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), August

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