For a more user-friendly experience and to compare all operators (Renfe, Avlo, Iryo, and Ouigo) in one place, use Trainline or Rail Europe . These sites often accept international payments more easily than the official Renfe site.
The most direct way is via Renfe (national), Iryo, or Ouigo Spain . Renfe's site can occasionally be difficult for international credit cards. buy train tickets spain
You can buy tickets at staffed ticket offices or self-service machines at Spanish stations. Note that popular long-distance trains often sell out in advance, and prices are higher on the day of travel. 2. Best Time to Book Help and information on buying tickets - Renfe trains For a more user-friendly experience and to compare