looks like this won't even operate this summer, very last minute cancellation!
no longer bookable on DL.com
http://news.delta.com/delta-suspend-...tanbul-service
Due to increased security concerns in Turkey, including a travel warning issued by the State Department, and weaker demand for air travel to this market, Delta has taken the decision to suspend its New York-JFK-Istanbul service due to start in May 2016. Customers can go to
www.delta.com for more information on re-accommodations.