KLM Boeing 737-800 was reportedly involved in a near-miss with a drone near Amsterdam-Schiphol Airport on 22 July 2016. Separation distance reported as 660 feet.
KL1280 reported seeing a drone at 2,7 NM from the threshold of runway 18R Amsterdam-Schiphol Airport. The drone was about 200 m to the left of the airplane.
Aircraft: Boeing 737-800
Aircraft altitude: 850 ft
Separation: 660 feet
Please note that separation distances are solely based on pilot’s judgements and not necessarily accurate since horizontal and vertical separation distances can be hard to judge.