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Thread: How does AA determine flight distance
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Old Sep 14, 2015 | 10:24 pm
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JDiver
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Unfortunately, AA miles earned figures are somewhat dynamic because they creep with annoyingly and unpredictable periodicity.

Use Great Circle Mapper and figure there will be a little error; use the figures you're given on aa.com or the PDF schedule, you'll be closer - until they shift the pegs again.
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