Hi @TIZIZ,
You are on the right way. As Scott already mentioned, the Palladian nodes are what you are searching for – you already have used them to generate the coordinates. Have a look at the Geo distances in combination with the ColumnDistanceNode.
Use two Geo distances nodes to calculate distance matrices for each column and feed your data plus the matrices into the ColumnDistanceNode to calculate the distances in km. The output for your first example is 33,44 km:
Best regards,
Daniel