Delta to resume flights between Atlanta-Frankfurt and Detroit-London, as well as operate cargo-only services between New York-JFK and Mumbai.

Delta is now the second-largest U.S. airline by passenger traffic, a common gauge of carrier size, Bloomberg reported Tuesday. Delta passed United Airlines in 2015 for the first time since United merged with Continental Airlines in 2012. Delta recorded 209.6 billion revenue passenger miles, an industry yardstick of traffic that ...

Delta Air Lines (NYSE: 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 ...