Thanks for the insight, and to clarify things further: We will arrive around 9pm into DCA, so only objective will be to get to the hotel (probably by 10pm) and then go to sleep.

On the next morning the idea was to have an early breakfast and then hop on the Metro to do some quick sightseeing in D.C. before we return to the hotel between noon and 1pm, pick up our stuff. After that head out to DCA again to pick up a rental car and drive to Potomac Mills, then on to IAD for our flight back to Europe at 9:50p.

Greetings - Dirk