Just called Delta about a DCA flight on Friday, asking if I needed to reschedule it out of Dulles or if I should just wait and see. They said I needed to reschedule. Flying to Cleveland via Cincinnati on some ComAir segments. I went to look at the seating chart and it looked like I snagged the last assignable seat on one of the segments. The other flights looked like about 70-80% of the seats were assigned. I'm not sure how full the flights will end up being.
The guy I talked to at SMS was very nice, and asked me if I wanted to keep the same dates and cities or not. I'm not sure what would have happened if I wanted to cancel and get a refund on account of the airport not being open.
Flying out of Dulles under new security restrictions will add about 3.5 more hours to my day.