Cheapest return flights from Washington to Lisbon in May from 561€

AirHint found the following cheapest return flights from Washington (IAD) to Lisbon (LIS) in May 2026 (see full year).

Return flights

07 May - 14 May Scandinavian Airlines
01 May - 10 May Royal Air Maroc
05 May - 19 May Brussels Airlines
20 May - 27 May Air Canada
09 May - 19 May Frontier Airlines
13 May - 20 May Scandinavian Airlines
09 May - 17 May Frontier Airlines
19 May - 30 May Lufthansa
11 May - 17 May Aer Lingus
13 May - 17 May Royal Air Maroc
26 May - 02 Jun Royal Air Maroc
31 May - 15 Jun Aer Lingus
29 May - 05 Jun Royal Air Maroc
15 May - 03 Jun Icelandair
26 May - 02 Jun TAP direct
15 May - 03 Jun TAP direct
29 May - 05 Jun TAP direct
25 May - 01 Jun TAP direct
30 May - 06 Jun TAP direct

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

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