Cheapest return flights from Washington to Lisbon in May from 594€

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

12 May - 19 May Scandinavian Airlines
05 May - 12 May Royal Air Maroc
04 May - 12 May Royal Air Maroc
01 May - 08 May TAP direct
02 May - 09 May TAP direct
11 May - 19 May Royal Air Maroc
06 May - 13 May TAP direct
07 May - 14 May TAP direct
11 May - 18 May Royal Air Maroc
02 May - 12 May Royal Air Maroc
21 May - 04 Jun Air Canada
02 May - 02 Jun Royal Air Maroc
28 May - 04 Jun Porter Airlines (Canada) Ltd
25 May - 01 Jun Porter Airlines (Canada) Ltd
27 May - 03 Jun Air Transat
20 May - 06 Jun Aer Lingus
20 May - 06 Jun TAP direct
27 May - 03 Jun TAP direct
02 May - 02 Jun TAP direct
22 May - 07 Jun Aer Lingus

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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