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Message: <blockquote data-quote="Alexb" data-source="post: 24062468" data-attributes="member: 556198">You mean if flight goes from Aus to USA through North East direction there are no land of such.?"Because it's big. Whether the earth is flat or round won't change the distance between the two. But one of the things that makes the flight longer than it could be is that planes have to be able to land within a certain time during the entire flight, in case something goes wrong and an engine fails. It's called an ETOPS rating, and some planes may have say a 2-hour limit. This means planes may not be able to fly direct, say straight over the Pacific. Interestingly, the LA-Sydney route can go pretty straight. I'm guessing there are just enough tiny Pacific islands with runways so that this is possible."</blockquote>

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