The Santarem to Caminha route is primarily served by regional trains operated by Comboios de Portugal (CP), with connections available at key transit points. The train services include the InterRegional (IR) trains, which reach speeds of up to 120 km/h (75 mph). The journey typically takes around 3 hours, depending on the specific connections and transfer times. These trains make several stops at intermediate stations, providing travelers with opportunities to explore smaller towns along the way. While this route does not feature high-speed trains, the IR trains are designed for comfortable travel, offering spacious seating and travel options for passengers. Additionally, on some segments of the route, travelers may connect with the Alfa Pendular service, which is faster and equipped with more amenities, although it is not available for the entire distance. This makes the combination of these services useful for reaching Caminha from Santarem efficiently while connecting through major hubs.