ATLANTA, Jan. 8, 2014 /PRNewswire/ -- Delta Air Lines (DAL) will invest more than $770 million through 2016 to refresh the interiors on its Boeing 757-200, 737-800, Airbus A319 and A320 aircraft to provide power at every seat, add new slim-line seats with adjustable headrests, updated lavatories, add more efficient galleys and additional features to improve passenger comfort.
