Air distance from Riga, Latvia to Lisbon, Portugal is 1958.6 Miles (3152.1 Kilometers / 1700.9 Nautical Miles).
4 hrs, 4 mins is the flight duration between Riga 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.