Originally Posted by
milesmuncher
Yeah I just realized that myself - so that part is an easy fix.
The real question now is going to be whether UA reimburses (even partially), the $350-$400 it's going to cost in Amtrak tickets and taxi fare to get there!
Could have went to the airport, UA has an agreement with Amtrack and could have endorsed your ticket from EWR to Washington (Union Station) to them. From there you could have picked up a shuttle to IAD.