If you're heading from Philly to DC, though, Malvern is about an hour and a half out of your way--we're nearly an hour north-west-ish of Philly, so you'd have to head to us and then back eastward again to pick up I95 to DC. You may not want to do things that way, depending on when you want to get to DC and how early you're likely to hit the Philadelphia area. I'm rarely home from work before 6:30-7:00 p.m.
If you're heading from Philly to DC, though, Malvern is about an hour and a half out of your way--we're nearly an hour north-west-ish of Philly, so you'd have to head to us and then back eastward again to pick up I95 to DC. You may not want to do things that way, depending on when you want to get to DC and how early you're likely to hit the Philadelphia area. I'm rarely home from work before 6:30-7:00 p.m.