This equation returns the distance between any two cities in Europe.  The distance includes units and conversions when applicable.  Any city can be the city of origin or destination.

Notes

This equation is linked to a Dataset with information about the air distance between the European cities.

References

Distance Between European Cities: http://www.mapcrow.info/european_travel_distance.html

Google Maps. https://www.google.com/maps/search/european+cities/@-22.5177247,64.6588295,3z