Estación Sur at Méndez Álvaro is Spain’s busiest bus station: more than 50 operators reach 1,500 destinations across Spain and 500 in Europe and Morocco — the country’s coach capital.
Everything coach-shaped in Spain touches Méndez Álvaro: ALSA runs the premium grid (Madrid–Andalusia all day), Avanza covers the north-west and Portugal, Socibus owns Andalusia’s interior, and FlixBus plus BlaBlaCar Bus fight over the budget international runs — Paris, Lyon, Lisbon, Milan, and across the strait to Morocco.
The terminal is a working 1990s machine: restaurants, lockers, parking, and the Circular metro line plus Cercanías trains built into the same block — the most connected coach station in the country.
Avenida de América handles the north-eastern flows (Zaragoza, Logroño, Bilbao side) with its own metro interchange; Moncloa covers the north-west suburbs and El Escorial.
Airport coaches are separate: the 203 Exprés Aeropuerto runs 24/7 from Atocha and Cibeles, and ALSA’s direct Barajas coaches serve provincial cities without touching Madrid.
Spain’s coach system is the one case where the bus regularly beats the high-speed train: Madrid–Granada by ALSA Supra undercuts the AVE and drops you at the same hour; Madrid–Lisbon overnight saves a hotel night; and half of Andalusia’s white towns simply have no rails. Use Estación Sur as the default, but check your ticket: Avanza’s north-western departures often leave from Moncloa or Avenida de América, twenty minutes apart by metro. Book Supra-class for anything over four hours — the upgrade buys a single-seat row and actual quiet. Friday afternoons out of Méndez Álvaro are the national exodus: the 16:00–20:00 window sells out a week ahead on Andalusian routes, so fix the ticket when you fix the hotel.
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