My gf is moving to DC and I live here in Wilmington. What is the cheapest way to get down to DC with regularity? Seems that the amtrak is pretty expensive- costing about $100 each weekend. I feel there has to be a cheaper way, but I don't want to take the SEPTA up to Philly to catch one of the cheap busses if possible. Are there any bus rountes from Wilmington to DC?