Traffic in Spain is heavily concentrated: Adolfo Suárez Madrid - Barajas Airport (MAD) alone handles about 66.2 million passengers a year, roughly 45% of the 146 million across the 5 airports listed here. That pattern is typical of a country with one dominant hub carrier feeding a single gateway.
Between them these airports operate 12 runways serving 5 cities, and the country spans 2 time zones, so a domestic flight here can change your watch. Every airport below links to a live map of aircraft observed within available ADS-B coverage around the field.
The next airport in the ranking is Josep Tarradellas Barcelona - El Prat Airport (BCN) at about 55.0 million passengers. The gap to MAD is 11.2 million, while the three busiest airports account for roughly 100% of traffic represented by this list. Most listed traffic is therefore concentrated at the top of the network.
The airports are spread across roughly 13 degrees of latitude and 16 degrees of longitude. That geographic spread makes weather, daylight and local operating conditions materially different across the same national network. Field elevations vary less dramatically than they do in the world's mountain-airport networks. The average across this selected set is 2.4 runways per airport.
Read airport by airport, the selected Spain network is not interchangeable: Adolfo Suárez Madrid - Barajas Airport (MAD) has 4 runways and about 66.2 million annual passengers, Josep Tarradellas Barcelona - El Prat Airport (BCN) has 3 runways and about 55.0 million annual passengers, Málaga - Costa del Sol Airport (AGP) has 2 runways and about 24.5 million annual passengers, Zaragoza Airport (ZAZ) has 2 runways and no comparable traffic figure and Fuerteventura Airport (FUE) has 1 runway and no comparable traffic figure. Those differences matter when comparing a live map. A larger passenger total indicates schedule scale, while runway count describes physical layout; neither number by itself proves how delayed, connected or operationally efficient an airport will be on a particular day.