It looks like we have picked up quite a bit of Dulles flying come October. Looking at the flight schedules, we will be flying to the following airports from:
SRQ, IND, BTV, PIT, EWR, SDF, CMH, YHZ, ATL, GSO, HSV, YUL, MCI, DTW.

Most of these airports will be daily departures, while a few of them are certain days of the week. It appears that all of these routes are currently flown by Mesa on the CRJ 700 & E175. It will be interesting to see what United does down the road as it appears they have began to shift their regional flying around.