If by ‘mentally’ you are referring to our physical faculties, then no. They can no more fly that a processor in your pc. You would have to say how cells chemicals and electricity can fly, when clearly we know they have no such qualities. Your experience can feel like flying though, as that is a metal quality [experiential qualia].
metaphysically speaking it is more correct to say we can only spiritually experience flying ~ as long as ‘spritual’ is or has our experiential qualia.