The times in the airline timetables are gate times or boarding door close and open times. Otherwise connections would be all messed up. At a big airport it is sometimes a 20 min taxi if there is no line up for take off.

Look for a schedule where the airports are 30 min apart at RJ speed. The trip time will be about 1 hour. 15 min taxi on each end, plus the 30 actual flying time.

On time is a different item. I believe a flight is condsidered On Time if it arrives within 15 min. of its scheduled time. After that its Late.