How to bring an instrument

When boarding an airplane, I want to carry important musical instruments with my own hands as carry-on baggage.However, there are size restrictions on the luggage that can be carried on board.It must be sized to fit inside the storage cabinet above the seat or under the seat.Therefore, it is difficult to bring in a large musical instrument such as a cello.In these cases, you would have to pay for the instrument and prepare a seat for one person.It is better to rent a large musical instrument locally in terms of money.