This calculator provides both the by air, and by road distance between two cities in both miles and kms, along with a map and driving directions. The “direct by air” distance – which is also known as the “as crow flies” distance is calculated using the “great circle distance” method. The driving route, by road distance, and a map showing the relative proximity of the two cities is provided below – please scroll down to see it, and a little further for the city to city driving directions.