Cheapest viable route
BriefUsually slower but dramatically cheaper than the flagship airport express.
- Service
- EMT Line 203 Exprés Aeropuerto (Atocha – Cibeles – O’Donnell – Airport)
- Mode
- bus
- Freq
- 15-20 day / 35 nightm
- Note
- This 24‑hour express bus connects all terminals with O’Donnell, Plaza de Cibeles and Atocha, giving direct access or easy onward connections to Sol and Gran Vía. Daytime frequency is roughly every 15–20 minutes (reduced to about every 35 minutes at night) with a flat fare of €5.