Originally Posted by quirrow

There is no need to exit to the street level, you just need to show your onward ticket on Garuda, best make sure it is printed on paper for convenience, and you can enter via a small passageway on the same terminal once you clear customs. Garuda uses concourse F for their domestic flights and most international flights will have you arriving via concourse. And have some Indonesian Rupiah ready to pay for the airport tax when you check in for the domestic flight.