An upgrade to Business class (or, on Acela, to First class). Here are the restrictions:
Coupon valid for one (1) space-available, one-way, one-class upgrade. Valid only from Coach to Business class, or from Acela Business class to Acela First class, on a single travel segment or leg.
Not valid for upgrade to sleeping car accommodations.
Subject to availability; upgrade not available on all trains at all times.
Upgrade may be combined with corporate, AAA, disability, NARP, military, student, and senior discounts but is not combinable with any other discount or Amtrak Guest Rewards® redemption travel.
Offer is not valid on the following services: Adirondack®, Auto Train®, California Zephyr®, Capitol Limited®, Cardinal®, City of New Orleans®, Coast Starlight®, Crescent®, Empire Builder®, Keystone Service®, Lake Shore Limited®, Silver Meteor®, Silver Star®, Southwest Chief®, Sunset Limited®, Texas Eagle® and train/Thruway series 7000 – 8999.
The eCoupon# is unique to your coupon and valid for one use only. Buying or selling this coupon is prohibited and will invalidate the coupon. Coupon may be transferred to a family member or friend.
Other restrictions may apply.
(In practice, I think it's valid on any service that offers Business Class, even the ones listed in the exclusions.)
