Two major U.S. airlines are joining forces in a blockbuster partnership. United Airlines will team up with JetBlue in a new alliance they are calling "Blue Sky," the carriers announced Thursday. The alliance will include a full-blown loyalty partnership that will allow United MileagePlus and JetBlue TrueBlue members the ability to earn and redeem miles on either carrier.

United Airlines and JetBlue Airways announced a new interline agreement dubbed “Blue Sky,” which has the aviation world abuzz.

JetBlue Airways Corp. agreed to a far-reaching partnership that will allow travelers to use loyalty points and book flights across the two carriers.The tie-up will integrate the airlines’ operations in the New York City area,