AA, JetBlue to Begin Frequent-Flyer Reciprocity

American Airlines and JetBlue Airways on Thursday plan to launch frequent-flyer reciprocity “in select markets,” after the two carriers expanded an interline agreement announced in March.

Frequent-flyer reciprocity will apply to markets on which the carriers interline, which after an expansion announced on Wednesday will include 26 JetBlue domestic routes and 15 American international routes, up from the 18 JetBlue routes from Boston or New York that connected with 12 international American destinations available when the carriers launched the partnership in March.

The carriers on Wednesday added to the interline agreement several JetBlue domestic destinations from Boston, including Baltimore, Orlando, Pittsburgh, Phoenix and Washington National, and one new American route, New York JFK-Budapest, which launches next year.