Air distance from Kathmandu, Nepal to Cayenne, French Guiana is 8837.2 Miles (14222.1 Kilometers / 7674.2 Nautical Miles).
Flight duration time from Kathmandu to Cayenne is 18 hrs, 21 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.