Cheapest return flights from Washington to Lisbon in May from 463€

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

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

Return flights

11 May - 23 May Icelandair
11 May - 27 May Icelandair
11 May - 29 May Icelandair
29 May - 05 Jun Air Transat
09 May - 12 May Delta
31 May - 07 Jun Air Canada
13 May - 21 May Icelandair
19 May - 28 May Icelandair
19 May - 12 Jun Icelandair
08 May - 17 May Delta
08 May - 12 May Delta
19 May - 24 May Icelandair
06 May - 15 May Icelandair
13 May - 06 Jun Icelandair
30 May - 06 Jun Air Transat
29 May - 08 Jun Porter Airlines (Canada) Ltd
30 May - 08 Jun Porter Airlines (Canada) Ltd
30 May - 09 Jun Porter Airlines (Canada) Ltd
31 May - 09 Jun Icelandair
20 May - 01 Jun Air Transat

Also check the deals for one-way flights from Washington to Lisbon in May.

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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.

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