Yes, virtually all Spanish trains (operated by Renfe, Ouigo, or Avlo) are equipped with onboard toilets as of 2026. On high-speed AVE and Alvia trains, you will find modern, vacuum-style toilets in every carriage, usually near the doors. Even the "low-cost" high-speed options like Avlo and Ouigo Spain maintain multiple toilets per train, including accessible units for passengers with reduced mobility. Regional Cercanías (commuter) trains are the only exception where you might find a lack of facilities on very short, older routes, though most modern suburban sets now include at least one toilet per train. The toilets on Spanish high-speed lines are generally well-maintained and free to use. Many of the newer trains also feature baby-changing tables within the larger accessible restrooms. If you are traveling on the Ouigo double-decker trains, note that toilets are available on both the upper and lower levels, ensuring that you don't have to navigate stairs if you have a seat on the top floor.