Getting to Portugal by train from London is the ultimate slow travel experience. In 2021, we bade farewell to the iconic Sud Expresso sleeper train, now consigned to history, but it is still possible to travel by train to Portugal. It requires two overnight stays en-route and by choosing stays in vibrant towns and cities like San Sebastian and Pontevedra, you can turn your relaxed rail discovery journey into one of the highlights of your holiday.