Air distance from Seattle, USA to Phnom Penh, Cambodia is 7468.2 Miles (12018.9 Kilometers / 6485.4 Nautical Miles).
15 hrs, 30 mins is the flight duration between Seattle and Phnom Penh. 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.