From Barajas Airport:

By taxi the approximated cost of the passage is of 22 €.

There are buses that travel from the airport and Plaza de Colon each 10-15 minutes, from 5:45 a.m. to 9:30 a.m. The duration of the travel is between half an hour and 3/4 of hour, when the traffic is not congested. During the rush hours maybe one hour of travel. The ticket costs approximately 3 €. From Plaza de Colon is near the underground Colon or Serrano. 

• By underground, line 8 until Colombia, line 9 until Principe de Vergara and line 2 until Sevilla.