During the early 1980s the company expanded both in the north and in Florida. Two new aircraft types were introduced: the Embraer EMB-110 Bandeirante and the larger NAMC YS-11. PBA began operating flights to New York/LaGuardia with the longer range aircraft. Also at this time, Van Arsdale retired and turned the company over to his two sons, John-o and Peter. The two boys started expanding the company to an even greater degree. Soon thereafter, an interline agreement was signed with Delta Air Lines, and in 1982 PBA became a regional feeder for Eastern Airlines. By the mid-1980s, in addition to Provincetown, Boston, and Hyannis, PBA's northern routes reached Martha's Vineyard, Nantucket, New Bedford, MA and Burlington, VT. The Florida routes virtually covered the entire state from Jacksonville to Tampa, Naples, Miami, and Key West, as well as smaller cities in between.