By air to Madrid:

The closest international airport to Salamanca is Madrid-Barajas (215 km. away), which is well-connected to the center of Madrid by underground, city bus and taxi.
(For further information about Madrid-Barajas International Airport, see: http://www.aena.es/madrid-barajas/)
(For further information about the Madrid underground, see: http://www.metromadrid.es)

From Madrid to Salamanca by coach or train:

1. By coach: [Coaches leave from: Estación Sur: c/ Méndez Álvaro, 83].
Length of trip: 2 and a half hours.
Coaches leave every hour.
(For further information about the Auto-Res coach service, see: http://www.auto-res.net)

2. By train: [Trains for Salamanca leave from the Madrid-Chamartín station].
Length of trip: 2 and a half to 3 hours.
Several daily trains.
(For further information about the trains operated by RENFE, see: http://www.renfe.es)

The taxi fare from the Madrid-Barajas Airport to the Auto-Res coach station or to the Madrid-Chamartín train station should be between 18 and 25 € (For further information about taxi fares in Madrid, see: http://www.ctv.es/radiotaxima/tarifas.htm)

Once in Salamanca, you can take a taxi from the coach station or train station to your dormitory or host family (4-6 €).