Jetstar typically allows passengers to bring one carry-on bag with maximum dimensions of 56cm x 36cm x 23cm (22 inches x 14 inches x 9 inches), including any handles, wheels, and external pockets.Jetstar carry on baggage size can fit safely in the overhead bins or under the seat in front of you during the flight. Additionally, Jetstar permits passengers to bring one small personal item onboard, such as a handbag, laptop bag, or camera case.

It's important to adhere to these size restrictions to avoid any issues during boarding or inflight. Exceeding the allowed dimensions may result in the carry-on bag being checked at the gate, which could incur additional fees.

Passengers should also consider any weight restrictions that may apply to carry-on baggage, as Jetstar may impose limits to ensure the safety and comfort of all passengers. It's advisable to check Jetstar's official website or contact the airline directly for the most up-to-date information on carry-on baggage size and weight allowances, as policies may vary depending on the fare class, route, and specific terms and conditions of the ticket purchased.