Delta Airlines starting May 2017 is adjusting New York JFK – Philadelphia service, as it begins operating Boeing 757-200 featuring Delta One lie-flat seating in premium cabin. Existing of 1 of 3 daily service operated by Endeavor Air CRJ aircraft will switch to the Boeing 757 (75W), until 28OCT17.
DL436 JFK1505 – 1624PHL 75W D
DL1400 PHL1655 – 1827JFK 75W D
Operational flight number and schedule varies, pending on seasonality.