Bus Barcelona - Bilbao prices from $41.90

Alsa, founded in 1923, is a prominent Spanish bus company that operates national and international routes. The company has grown to become one of the largest bus companies in Europe. Alsa provides a comprehensive range of services, including regular and express routes, luxury buses, and sleeper buses. Alsa, dedicated to sustainability, reduces its carbon footprint by using alternative fuels and energy-efficient technologies.

Established in 2018, BlaBlaCar Bus was born out of BlaBlaCar's acquisition of OUIBUS in November of that same year. The company officially launched in June 2019 and has since been offering long-distance bus services across Europe. Initially known as BlaBlaBus, the company went on to adopt the name Ouibus, before finally deciding on its present name, BlaBlaCar Bus. BlaBlaCar Bus operates a network of routes that link several cities, including Aix-en-Provence, Amsterdam, Barcelona, Brussels, Genoa, Lille, London, Lyon, Marseille, Milan, Nice, Paris, Paris Charles de Gaulle Airport, San Sebastián, and Turin.

FlixBus, a long-distance bus company, operates in both Europe and the United States. Founded in 2013, it has grown to become one of the largest bus operators in Europe, connecting over 2,500 destinations in 30 countries. Originating in Germany, FlixBus has expanded quickly to neighboring countries including France, Italy, Denmark, the Netherlands, and Croatia, while also offering regular services to Norway, Spain, and England. With affordable fares and comfortable amenities such as free Wi-Fi, power outlets, and onboard toilets, FlixBus provides a convenient and enjoyable travel experience.