I know of no archeological evidence that ancient Egyptions had flying objects large enough to carry people.  That doesn't mean that they didn't have kites and gliding toys. 

One thing to keep in mind is that pictures left by ancient people are no different than our art. They represent dreams as well as reality. So a picture of a birdlike object with people on its back may be a metaphor, a fable, or some artist's dream of crossing the Nile without losing a foot to the crocodiles.