The route from Coimbra to Viana do Castelo is serviced primarily by the Alfa Pendular train, which is a premium option known for its superior speed and comfort. This train can reach speeds of up to 220 km/h (137 mph) on certain sections, allowing for a swift travel time of around 2 hours. The Alfa Pendular offers both first and second class seating, enabling passengers to choose their preferred level of comfort during the journey. Unlike more urban routes that may incorporate high-speed trains, this segment features a combination of scenic countryside views and stops at key towns along the way, enhancing the travel experience. Another service that may occasionally be available is the Intercidades train, which operates at slightly lower speeds, making the journey take closer to 2 hours and 30 minutes, with added stops along the route. Both train services are equipped with amenities such as Wi-Fi and food services, providing a comfortable travel environment, but the Alfa Pendular stands out for those prioritizing speed. Overall, the choice between the Alfa Pendular and Intercidades will depend on whether passengers value time efficiency or a relaxed journey with more stops.