Air distance from Quito, Ecuador to Helena, USA is 3805.2 Miles (6123.9 Kilometers / 3304.4 Nautical Miles).
7 hrs, 54 mins is the flight duration between Quito and Helena. 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.