Delta Air Lines, recognized as the second-largest operator of flights between the United States and Europe after United Airlines, operates from 11 hubs across the US. New York JFK remains its primary European gateway.
Delta maintains a single transatlantic route from Cincinnati, Los Angeles, Orlando, and Tampa. These routes are aligned with SkyTeam's European hubs in Amsterdam and Paris CDG, in collaboration with joint venture partners KLM and Air France.
Cincinnati's sole European connection is to Paris CDG, a service active since 1997. Between 2000 and 2006, Delta also operated flights to several other European cities from Cincinnati. However, post-bankruptcy restructuring led to Cincinnati losing its hub status.