Air distance from Chicago, USA to Poznan, Poland is 4531.8 Miles (7293.3 Kilometers / 3935.4 Nautical Miles).
Flight duration time from Chicago to Poznan is 9 hrs, 24 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.