I will have 2 layovers at Barajas on a trip this March to Istanbul (from Boston). Both are about 4 hours long, one being from 7:00 am to 11:00 am, the other from 10:15 am to 2:00 pm.
I don't think this will be enough time to leave the airport, even for something close by.
Does anyone know of anything at the airport that is good? No specific desires, just anything good. I spent 10 days in Spain 2 years ago and was in food heaven. Just looking for a taste of something good while in transit.