In general, tickets for AVE, Larga Distancia (Long Distance), Avant (mid-distance high-speed) and Media Distancia Convencional (Conventional Mid-distance) trains can be changed a maximum of three times and always for the same origin and destination.
Cercanías (Commuter) and Feve services, however, do not admit changes.
The change conditions will depend on the fare you have purchased.
On Ave, Larga Distancia (Long Distance), Avant (mid-distance high-speed) and Media Distancia (Mid-distance) trains, tickets can be exchanged up to 3 times, within their validity period. The origin and destination cannot be changed.