Washingtom DC has serval airports:
KLM has a daily flight from Amsterdam
(IAD) with an Airbus A330-200 in 2009. The flight seems to leave
AMS at 1:20 pm and arrives in Washington at
4:00 pm local time after an 8 hours and 40 minutes flight
distance of 6.177 km or 6.861 miles.
It seems that KLM doesn't fly from AMS to DCA in 2009.