Air distance from Chicago, USA to Lucknow, India is 7674.9 Miles (12351.5 Kilometers / 6664.8 Nautical Miles).
15 hrs, 56 mins is the flight duration between Chicago and Lucknow. 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.