The short and simple answer is there is no route map because there are modifications to what base flies what routes and removal and addition of cities on a monthly basis. It changes a little all the time.
Some things don't change, though. DAY and TYS will do flying out of DCA, PHL, and CLT, the majority being CLT.
All CLT trips are turns back and forth from CLT.
There are a fair amount of cities we go to as well as a lot of routes that are frequently seen. For example, there are many daily CLT-FAY flights as mentioned above.
If you are trying to learn this for the interview, it's a good effort, but not something they are going to expect you to know or ask you in explicit detail.
If you are trying to just gain a gauge on what routes to expect, it changes a lot. Expect an average of 1 hr block time and 45 min of flight time per leg. I would guess that at least half of the departures are 20 and 30 minute flights.