Since we have airships, I dont think it would be a stretch for navigators to keep good records about winds currents and common weather conditions. Maybe something  like multi layered map or an almanac.
If certain winds flow cosistently in one direction or another, then you could have glider ferries or aerial highways for glider traffic.

Also if these ships are held aloft by magic, what's powering the magic? Are there any measures taken to protect it?