The carrier will allow one bag that can fit under the seats, such as a backpack, handbag, or laptop bag, for no extra cost, but a larger bag could cost between A$25 and A$52 (US$18 and $37) per flight depending on the route, according to examples provided by the airline.
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.
Passengers 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. The charges have drawn criticism from some consumer groups, which argue that advertised base fares do not always reflect the full cost of travel.
Jetstar's policy, which the airline said would help speed up the boarding process, sparked angry reactions from some travellers and politicians.
