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I heard that landfall for Uniteds Hong Kong to Chicago flight is near Seattle but the map shows it flying north of Alaska! Why the difference?

April 26, 2017Chicago flight heard hong kong landfall map near Seattle shows United

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I heard that landfall for Uniteds Hong Kong to Chicago flight is near Seattle but the map shows it flying north of Alaska! Why the difference?

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Flying eastbound, tail winds make it advantageous to fly a more southerly route even though it is longer. The great circle route is the same in either direction but is only used for the westbound, ORD-HKG flight, which would encounter substantial head winds if it flew the more southerly route.