Cheapest one-way flights from Washington to Lisbon in May from $378

Best time to book flights for Washington (IAD) to Lisbon (LIS) flights at AirHint

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

One-Way flights

31 May Icelandair
12 May Icelandair
14 May Royal Air Maroc
27 May Icelandair
20 May Turkish Airlines
19 May Royal Air Maroc
18 May Turkish Airlines
13 May Icelandair
21 May Royal Air Maroc
26 May Porter Airlines (Canada) Ltd

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

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.

Book a cheap hotel in Lisbon

Cheap car rent in Lisbon