International trains in PortugalInternational train linking Porto (Campanha) with Vigo (Guixar) in Spain. A cooperation between CP and RENFE of the Spanish railways. A reservation is required (no fee at the railway station).
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Why is there no train line between Spain and Portugal? Renfe needs to invest €15 million to adapt part of its rolling stock to Portuguese infrastructure, according to La Información. Various infrastructure issues need to be addressed before cross-border trains can operate.