Training is a surprisingly short process. A Harris hawk can be trained to fly totally free and retrun to the falconer in about 3 weeks, or even less.
The hawk must be a little hungry when flown, as it ONLY returns to the falconer for food. It is weighed at the beginning of the training, and the falconer will expect to reduce the fat weight of the hawk by about 10% to start with, and will adjust this “flying weight” a little if necessary.