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Thread: How do BA calculate flight distance?
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Old Oct 24, 2017 | 8:08 am
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tigertanaka
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Originally Posted by crazyanglaisy
There's also that oddity where BA thinks the distance to a destination is different to the distance back to LHR. I know that Boston flights have given me 1 less Avios for the return flight, and I think there may be a couple of other destinations thst are like this too.

Edit: tigertanaka got there before me!
ARN-LON got you 891 miles each way for LCY and 890 for LHR no matter what direction you went.

BA's systems are seriously weird if you get a different amount for one way compared to the other.
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