Doha-Washington-Atlanta
Dont think about JFK.
Flights always screwed up. Either u will be sitting at JFK for hours or they will ask u to take bus ride to philly(happened to me) and then travel for forward journey. Delays at Washinton Dulles very few and atleast the pilot shows up. In my case, US Airways, pilot did not show up at JFK. Take South West within US. Daily flights from Dulles.