[Source: Life as I Know It | Via NA]
No, one simply hops on a giant eagle and flies in.
that would be called a rock…a bird capable of taking on a dragon
er…no? In Tolkien's universe, they were definitely called Eagles. They were Giant, Talking, Intelligent Eagles, including the Lord of the Air… http://lotr.wikia.com/wiki/Great_Eagles
not to mention he meant roc.
Semantics: they flew *out.*
It stands to reason that if they can fly out, they can also fly in.