Trains from Madrid Atocha to Santander Estación

Renfe is the national train operator in Spain. It operates trains on the longest high-speed railway network in Europe, and the second-longest in the world. The country's major cities are linked up by the high-speed AVE and Avlo trains, while other long-distance routes are served by Altaria, Talgo, Alvia and Euromed trains. Renfe also operates cross-border services into neighbouring Portugal and France. Depending on which service you are travelling on, you'll usually find two classes on Renfe trains - Estándard (Standard Class) and Confort (First Class). Fare types range from the cheapest (but least flexible) Básico fare, to the more flexible Elige fares, to the Premium fare for seats in Confort carriages.

Renfe's Alvia services combine high-speed tracks with lower speed sections, reaching speeds of up to 155 mph (250 km/h) on international lines and 125 mph (200 km/h) on conventional lines. These trains connect the cities of Madrid, Barcelona and Alicante with the other main Spanish cities. Alvia offers two types of classes – Turista (Second Class) and Preferente (First Class). The latter has wider seats, carriages with fewer seats, offers complimentary food and drinks, free newspapers, and access to parking and Club meeting rooms.

Renfe's Media Distancia are regional trains operated by CAF locomotives that run on medium-distance routes not covered by Avant high-speed trains. Most Media Distancia trains have one class. However, there are some that will have Turista (Second Class) and Preferente (First Class). These trains also have spaces for bicycles, and all seats are equipped with power sockets and reading lights.