Every airline has an overview of the short, medium and long haul routes. Maybe it is an idea to set this up for each particular airport as well? So you can get an overview which routes are operated from the particular airport. Beneficial is that you can also have an overview of the regions which are not served creating better (quicker) understanding where to open new routes to.
While not directly supported by AS, some very programming-capable members have done us all a great favor by setting up the following tools:
Here you can select the routes from a specific base
http://meterbit.monoceres.uberspace.de/list/
Live Traffic Maps