Air distance from Riyadh, Saudi Arabia to Monrovia, Liberia is 3965.5 Miles (6381.9 Kilometers / 3443.7 Nautical Miles).
Flight duration time from Riyadh to Monrovia is 8 hrs, 14 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.