Air distance from Roseau, Dominica to Ulaanbaatar, Mongolia is 8036.7 Miles (12933.9 Kilometers / 6979.1 Nautical Miles).
Flight duration time from Roseau to Ulaanbaatar is 16 hrs, 41 mins. 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.