I remember myself using a mileage calculator website once where you key-in an origin and specify a distance in miles then it shows a circle on the atlas which entail all cities within that equidistance. Unfortunately, I can't remember it now but thought it could be very handy to determine a collection of cities where I can reach (within 1.2k, 2.5k, 5k miles, etc.) by redemption of a given Asia Miles mileage. Could you anyone let me know any website which serves that function? Many thanks