Originally Posted by KARFA

IAD (if an A380) will arrive at T5C gates. I think that there are actually A380 gates in T5B but they are rarely if ever used for A380s. For a non A380 flight it is likely to be a T5C or B gate but could be bussed in which case you will be bussed to T5A.

DUB departures should be from a T5A gate, possibly bussed.