I think that partly explains why non-American airlines use miles over kilometers for frequent flyer rewards program. A program denominated in kilometers would

I think that partly explains why non-American airlines use miles over kilometers for frequent flyer rewards program. A program denominated in kilometers would have to undergo conversion to miles if being deposited into a US account holder. On top of that, benefit levels would be different--a Star Alliance Gold level will be 50,000mi or 80467.2km. However, ANA Mileage Club has a better ring to it than ANA Kilometerage Club. Interestingly, most airlines are now moving away from miles in rewards programs and moving into the Unit of Measurement that counts the most: revenue.