Delta To Improve Passenger Comfort on over 200 Domestic Narrowbody PlanesMichael BeenerThursday, January 9, 2014Monday, January 13, 2014 Thursday, January 9, 2014Monday, January 13, 2014 Delta Air Lines will invest more than $770 million through 2016 to refresh the interiors on its Boeing 757-200, 737-800, Airbus A319 and A320 aircraft...