Every Lisbon–Washington fare we track, measured against the route's typical price whenever there is enough cached history to build one. Subscribe in any RSS reader for free single-route price alerts — no account, no email needed.https://flight.dealsen-ushttps://flight.deals/flights/lisbon-to-washington/#2027-04-01-2027-05-03-AThttps://flight.deals/flights/lisbon-to-washington/#2027-04-01-2027-05-03-ATLIS → WAS round-trip on Royal Air Maroc, 2027-04-01 to 2027-05-03 (32 nights). Cached fare $651. Not enough cached history on this route yet to say what it usually costs.Sun, 23 Aug 2026 05:58:32 GMT