United Airlines will begin daily nonstop flights from its hub at Chicago O’Hare International Airport to Luis Muñoz Marín International Airport in San Juan, Puerto Rico. United will begin additional seasonal nonstop service between Chicago and San Juan on Dec. 4, 2013. Flight UA1448 will depart Chicago O’Hare at 4:10 p.m. daily, arriving in San Juan at 10:48 p.m. The return flight, UA 1405, will depart San Juan at 7:05 a.m., arriving in Chicago at 10:29 a.m. The seasonal service will operate until Jan. 6, 2014. With the addition of the Chicago flights, United will offer nonstop service between Puerto Rico and five of its hubs. The airline already serves Puerto Rico nonstop from Cleveland, Houston, New York/Newark and Washington, D.C./Dulles.