Delta Air Lines will operate four of its upcoming summer seasonal routes, originally slated to end Oct. 27, as year-round routes, the carrier confirmed Monday. 

Those changes include flights between New York’s John F. Kennedy Airport and each Berlin, starting May 25, and Geneva, Switzerland, beginning April 10, as well as flights between Los Angeles International Airport and each London Heathrow, starting March 25, and Paris Charles de Gaulle, starting May 8. The seasonal routes initially were announced in September. All four routes will operate daily.