Air distance from Unalaska, USA to Basseterre, Saint Kitts And Nevis is 5816 Miles (9360 Kilometers / 5050.6 Nautical Miles).
Flight duration time from Unalaska to Basseterre is 12 hrs, 4 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.