The bus calls in at Estacion Sur Bus Station in Madrid for about 15 minutes but continued onto Barajas Terminal 1.
If you have a look on the Socibus.es website you will see the timetable.
Extract here:
01:00- SEVILLA 07:30 - BARAJAS
08:00- SEVILLA 15:10 - BARAJAS
10:30- SEVILLA 17:00 - BARAJAS
14:30- SEVILLA 21:40 - BARAJAS
