The 685 miles between Holland, MI and Arlington, VA took me 11 hours inclusive of several coffee offload stops. The 529 miles from Arlington, VA to home took 11 hours as well with only about 30 minutes lost to traffic (fargin' Garden State Parkway).
In short, it's a straight Interstate shot from NoVa to Holland. Be prepared for crappy gas mileage, though, as it's pretty much all uphill from NoVa until the Pittsburgh suburbs. An EZPass will make your life easier.
If the Earth were flat, cats would have pushed everything off of it by now.