They will require passengers who want to store carry-on bags in ​overhead lockers to pay extra from February, as the airline overhauls ‌its cabin baggage policy. The move brings Jetstar’s carry-on baggage policy closer to systems ​used by several low-cost airlines globally, which charge passengers for access to overhead ​locker space while including a smaller under-seat bag in the base fare. Article continues after advertisementPassengers requiring additional carry-on luggage will be able to pre-purchase “Priority Carry-on”, which includes a larger overhead locker ​bag and early boarding access and removes the previous 7-kg (15-pound) weight limit. Fees ​for baggage, excess luggage, seat selection and priority boarding account for a growing share ‌of ⁠revenue for low-cost airlines. Jetstar CEO ​Stephanie Tully said the new model would help improve ​on-time departure ⁠performance by streamlining the boarding process and making better use of overhead locker space, adding the changes were consistent with the airline’s low-fares philosophy.