Trains in Portugal are generally considered very reliable, efficient, and cost-effective, particularly for travel between major hubs like Lisbon and Porto. The national operator, Comboios de Portugal (CP), runs a diverse network, with the flagship Alfa Pendular high-speed trains reaching speeds of 220 km/h (137 mph). These trains are known for their "tilting" technology, which allows them to maintain high speeds through curves, ensuring punctuality even on winding coastal routes. While regional trains in the Algarve or rural North may be slower and less frequent, the main "Long Course" lines have high on-time performance ratings. In 2026, many travelers prefer the train over driving because it avoids the high tolls on Portuguese motorways. However, travelers should be aware that while the service is reliable, seat reservations are mandatory for Alfa Pendular and Intercity trains, and it is highly recommended to book via the official CP app or website at least a few days in advance during peak summer months to guarantee a seat.