We just did that exact flight last Wednesday. But our flight from CGK to home wasn’t until the next day at 6:20 am. I would have preferred to to take an even earlier flight from LBJ to CGK since it was the last flight of the day and if it was cancelled we would miss our flight home. They were both separate itineraries so the airlines doesn’t have any obligation to get us home if we miss the flight. We would have to buy an entirely new ticket.