Don't have to call - just enter H644 in the code part of the reservation page. If it is available, it will allow you to use this promotion.Just a heads-up in case you didn't make it past the AAA companion fare 50% off headline to the small print on the Amtrak website which also allows for a 25% discount on sleepers through mid-March on many routes. You have to call for reservations to use the discount code posted on the website, however.
Joseph
Erie, PA