Cheapest return flights from Washington to Lisbon in May from 567€

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

19 May - 26 May Icelandair
21 May - 28 May Porter Airlines (Canada) Ltd
03 May - 07 May Icelandair
03 May - 14 May Icelandair
02 May - 15 May Icelandair
04 May - 19 May Icelandair
04 May - 12 May Delta
08 May - 11 May Icelandair
01 May - 04 May Icelandair
18 May - 25 May Air Transat
29 May - 08 Jun Porter Airlines (Canada) Ltd
28 May - 01 Jun Porter Airlines (Canada) Ltd
29 May - 05 Jun TAP direct
26 May - 02 Jun TAP direct
29 May - 08 Jun TAP direct
23 May - 01 Jun Porter Airlines (Canada) Ltd

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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