Airlines have expanded extra-legroom seating on planes and labeled more plain coach seats as preferred, leaving fewer seats to reserve in advance without fees. Extra-legroom seats on Delta are up to 16% of the coach cabin from 12% because of strong passenger demand, and another 16% of seats on average are preferred. Parents are having an increasingly difficult time guaranteeing free seats next to their children. With United,...

Source: Wall Street Journal May 25, 2016 12:16 UTC