Air distance from Seattle, USA to Kowloon, Hong Kong is 6495.8 Miles (10453.9 Kilometers / 5640.9 Nautical Miles).
Flight duration time from Seattle to Kowloon is 13 hrs, 29 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.