Calculate flight distance in miles between any 2 cities

Hi guys,

Is there any way to calculate distance between two international cities, when travelling by air? (say, for example between Tunis and Amman)

I use below website to retrieve distance in miles and manually input in my reports.(cumbersome, with hundreds of rows)

airmilescalculator(dotcom)/distance/tun-to-amm/

Appreciate your assistance.

Thanks,
Alex