Cheapest return flights from Washington (IAD) to Lisbon (LIS), May

Select a price to book. see full year.

Dates, airline, and price
Dates Airline Price
26 May 07 Jun Royal Air Maroc
16 May 28 May Royal Air Maroc
15 May 28 May Iberia
07 May 17 May TAP
Direct Flight
16 May 28 May TAP
Direct Flight
26 May 07 Jun TAP
Direct Flight
15 May 28 May TAP
Direct Flight
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deals for one-way flights from Washington to Lisbon in May.

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Updated Jul 13, 2026.

About these fares

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