Is there a way to add a directional arrows for the flight routes on a map, so I can see from-to?
There are several steps and potential complications, but yes, you can.
You'd need a shape polygon defined in a separate data source, an Excel file with a few X,Y coordinates would be enough. Then, Relate that to your existing data with a 1=1 condition. If you just have straight lines as your flight paths, then you can probably do something like take the average coordinates to put an arrow in the middle. If you're using great circle lines (so curves on a map view) then you're going to have to be doing some heftier maths to get a position on the line. You can then plot the polygon at the location you've calculated, and work out the rotated coordinates for each point based on the origin and destination. Again, if you have straight lines between the two, this is normal level trigonometry. If you're using the arcs, then I wouldn't want to be doing the maths.
