You can take either metro or bus 115 (Pza. Hnos. Falco y Alvarez de Toledo stop) from city center to the house. Though the bus takes more time, the stop is closer to the house. The location is really near the airport, and it's easy to go there by walk. Besides, Sergio and his roommates keep the house very clean and cozy, and make you feel at home! Highly recommend!