Originally Posted by
cruisr
I am always delayed out of IAD and I also would be very nervous with that short a connection. As suggested try to do the SDC 24 hours before the first flight.
I'd be shocked if SDC would work. It can be very difficult to SDC one of two legs on a connecting itinerary even when there's still availability on both. When one of them is zeroed out -- and will likely remained zeroed out -- the chances are extremely slim.
Standby at IAD on the day of departure
might be an option, but even that may run into the same problem.