Rideshare is his best bet. Contact some of these people...

http://www.erideshare.com/carpool.php?dstate=VA

or just post up on Craigslist's rideshare.

http://washingtondc.craigslist.org/rid/


... I found a ride through Craigslist from Ottawa to Toronto (about 5 hours) while in Canada a few months ago to go visit relatives.