Formerly under the control of AirTran (now phased into Southwest), this B717 is now operated by Delta. Took me a minute to realize that Delta didn't usually operate DC-9 sized aircraft these days and that it was actually one of AirTrans' 717s. The tail number gave it away. N935AT.
Delivered to AirTran in July of 2003.
Delivered to Delta in October of 2014, even though AirTran went out of service on December 28th, 2014.