JetBlue is introducing a new seat fee called "Core Preferred" for seats ... with a mix of Airbus A220, A320, A321, and Embraer ERJ-190 aircraft.

With JetBlue's 16th birthday coming up ... The airline will add economy seats to the A321 aircraft during the retrofit, bringing the total number of seats to 200, and reduce a row of seats ...

JetBlue said the EvenMore seating offer is part of its JetForward strategy, announced last year, that added premium offerings ...

JetBlue flies to more than 100 cities ... Free movies, DirecTV Airbus A321 Classic: "Introduced in 2013, the 200-seat all-Core Classic is tailored to create an even more traveler-friendly flying ...