The cancellation policy for the train from Houston to San Antonio, operated by Amtrak, varies based on the type of fare purchased. For flexible fares, cancellations made before departure typically receive a full refund without any fees. For value and saver fares, a refund may be available, but a cancellation fee could apply, or you might receive an eVoucher for future travel instead. https://reservationsus.com/what-is-the-cancellation-policy-for-the-train-from-houston-to-san-antonio/