Yeah, that would have been silly. Now if only Gandalf knew some large flying creatures that were friendly to him and the hobbits that could have flown Frodo and the ring to Mount Doom, that would have been much better.
Hey now, don't be dissing my man Gandalf for the one thing he was actually good at - convincing other people (well creatures in this case) to do stuff for him. If the eagles had flown while Sauron was alive they would have been killed [... snip page long rant written with the eloquence of a 7th grader who thinks he's writing a thesis ...] just like the Balrog.
Well I've made my point. Good day!