Good Afternoon
Would it be possible to draw “lines/routes” between airports for own purposes?
Regards
Richard S
You should not add lines into the OSM database for this. There might be an argument for adding actual airways (what ever they are called) where planes are allowed to fly, but even that is probably better served by aviation specific maps.
If you want to do something like a map animation showing how you flew on a vacation, there are some tools for that. For example GpxAnimator allows you to animate a GPS track over a number of backgrounds including several that use OSM data. You can acquire the GPX data in a couple of ways. For example with a window seat and a mobile phone with a good GPS subsystem you can collect your actual track. If that is not possible, I have seen some web sites that will generate a GPX file using a great circle route between two points.
Hi and welcome to OSM and the forum
If this is just for a single visualisation try: https://umap.openstreetmap.fr/en/