It’s not quite codesharing, but American Airlines and JetBlue have formed a partnership of sorts, focusing on routes in and out of Boston and JFK.

As the press release put it, this will “extend and complement each others’ networks. For example, it would provide seamless service for customers who wish to fly nonstop from Nantucket to JFK on JetBlue and from there to London on American. Likewise, customers can board American from Paris to JFK and connect to a nonstop flight on JetBlue to Burlington, Vt. JetBlue customers will be able to effortlessly connect on flights to 12 of American’s international destinations from JFK and Boston including Barcelona, Spain; Sao Paulo, Brazil; and Tokyo, Japan.”

This leaves us with some question, as Upgrade: Travel Better’s Mark Ashley notes: “Will JetBlue flights count toward AAdvantage? Vice versa? If so, it will be an interesting question how the programs, which function very differently, reconcile.” Indeed.