After you purchase tickets with Amtrak for iPhone, you can add your trip to Calendar, complete with your choice of calendar, alert time, and whether the app creates one long event for the trip’s duration or an individual event for each train.
Your upcoming trips will appear in a scrollable list at the bottom of Amtrak’s homepage. To add them to Passbook for easy scanning at the station:
tap one of your tickets
tap the View button
tap the View eTicket option
on the eTicket page, tap the action arrow for the Passbook option