Because they would have been spotted by the eye of Sauron or the sentries near the entrance if they flew over.
English
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Something tells me you didn't read the post...
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He was talking about why they didn't use the Eagles to get to Mt. Doom
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[quote]So why didn't they give a shit about flying Bilbo & co. away from those goblins/wolves when he had it?[/quote] This was the question being asked.