Madrid is not far away and if it´s your first time in Spain maybe a weekend in Madrid is a good option. You can go there by bus ( more less 6-5 hours) and if you choose the midnight bus you´ll be in Madrid early in the morning. Also there are trains ( more or less 5 hours and a good option is the nigh train to sleep) and you can look for cheap plane tickets. For more information you can go to the Bus station or train station, also you can check ALSA web page for the buses, RENFE web page for the trains and RYANAIR or VUELING web page for cheap plane tickets. Of course Iberia has flights between the two cities but they are usually more expensive unless you find a promotion, check IBERIA webpage. REMEMBER: Madrid bus station and train station are in the city centre so you don´t spend time in going from and back the Barajas airport.
Our advise is: go for a short weekend and find a cheap hostel in Madrid city centre. You can go on the Friday evening and go back on the Sunday afternoon. That´s not a lot of time but enough to visit at least one of the Madrid museums and have a walk around Madrid streets and you will have a complete free night to have a drink and enjoy Madrid nightlife. Another option is a long weekend of three days ... then you need a free Friday or Monday.
UNILANG IDIOMAS, SPANISH COURSES IN SANTANDER