And anyway the train sounds scenic and pleasant, if not tremendously frequently run:
”Porto, from where there’s a twice-daily direct train to Vigo in Spain. The cross-border hop really rates as one of Europe’s finest international rail journeys”
https:/amp.theguardian.com/travel/2022/dec/06/rail-journey-of-the-month-lisbon-vigo-porto-train-railway-portugal-spain