Yes, most high-speed trains in Spain, operated by Renfe, offer Wi-Fi through a service called "PlayRenfe." This service is available on AVE and Avlo trains, as well as many long-distance (Larga Distancia) routes. Passengers can connect to the network by using their ticket number or their "Más Renfe" loyalty program credentials. The Wi-Fi service often includes a multimedia platform where travelers can stream movies, news, and sports. While the basic connection is free, it can sometimes be spotty in tunnels or remote mountainous regions between cities like Madrid and Barcelona. For business travelers, the "Premium" class or certain loyalty tiers sometimes offer more stable or faster bandwidth. Even the low-cost Avlo trains have Wi-Fi, though you might need to register for a free account to access it, making Spain one of the more "connected" rail networks in Europe.