IAD is going to see quite a bit of growth in the near to medium term as deliveries ramp up and the new gates are built over the train stop in nowhere. It also has plenty of growth potential just by adding banks (only three daily banks and 200+ departures right now). DEN and IAH can also grow but are already above 400 departures, so not as much. Our other hubs are much more constrained. EWR is obviously choking, so if the company wants to add significant connectivity on the East coast it will be in IAD. Good place to be based the next few years if you live there.