Air distance from Asmara, Eritrea to Ulaanbaatar, Mongolia is 4426.3 Miles (7123.4 Kilometers / 3843.8 Nautical Miles).
9 hrs, 11 mins is the flight duration between Asmara and Ulaanbaatar. 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.