Jetblue and United are teaming up. The airlines announced a partnership on Thursday to sell each other’s flights and link up their loyalty points programs. It’s the latest move by JetBlue to expand its network of routes. For years, Jetblue has been searching for the one — an airline to partner with, said Richard Aboulafia of AeroDynamic Advisory.

The two travel giants are teaming up for a new alliance called Blue Sky that’s set to change the game for airline passengers.

The arrangement will allow the airlines’ customers to earn and spend frequent-flier miles on both airlines.