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.

JetBlue Airways and United Airlines announced a new collaboration called "Blue Sky" on Thursday. The collaboration will allow for reciprocal loyalty program benefits like priority boarding and complimentary access to preferred seats.