Air distance from Washington DC, USA to Lisbon, Portugal is 3583.2 Miles (5766.7 Kilometers / 3111.7 Nautical Miles).
7 hrs, 26 mins is the flight duration between Washington DC and Lisbon. This is the In-The-Air flight time. You should also add the taxi time, airport wait times and possible delays due to bad weather, etc. for the total flight duration time.