Porto Airport (OPO) to Madrid bus

Alsa is the main provider of bus travel in Spain. As a subsidiary of the UK bus company National Express, Alsa offers a plethora of regional, national and international routes and transports more than 300 million passengers per year. Alsa has an impressive fleet of buses with different levels of comfort and amenities on offer. Aside from the Alsa Normal bus with free WiFi, bathrooms, footrests and entertainment on board, the Alsa Supra, Alsa Eurobus and Alsa Premium buses provide more luxurious services when traveling by road, depending on the specific route. Apart from the Standard ticket, Alsa offers other bus tickets like Minimum, Reduced and Flexible fares on select routes.

FlixBus is one of the most popular low-cost bus companies in Europe. Founded in Germany, FlixBus has expanded its services throughout Europe and even to the United States, giving travelers in both continents the option to take a long-distance bus at an affordable price. FlixBus also operates overnight buses on select routes throughout Europe. FlixBus offers only the Standard ticket for all its routes, which allows you to bring one carry-on bag and one checked bag per person. Additional fees apply for bringing extra luggage and making specific seat reservations, such as if you want to book an Extra Seat, Table Seat or the Panorama Seat. Standard amenities onboard include free Wi-Fi, power outlets to charge your phone, tablet or laptop during long bus journeys, extra legroom, luggage space and toilets.

BlaBlaCar Bus (formerly known as Ouibus or iDBUS) is a popular French bus company from France operating long-distance services in 10 countries in Europe and connecting over 300 destinations. It is a subsidiary of the French carpooling service, BlaBlaCar. Standard amenities on BlaBlaCar Bus include toilets, air conditioning, USB and power outlets for charging phones, tablets and laptops during long bus journeys, extra legroom and adjustable seats. There is also free Wi-Fi available on select routes. The only ticket type from BlaBlaCar Bus is the Standard ticket, which allows each traveler to bring one carry-on bag and up to two checked bags.