Traffic in Romania is heavily concentrated: Henri Coanda International Airport (OTP) alone handles about 14.9 million passengers a year, roughly 99% of the 15 million across the 4 airports listed here. That pattern is typical of a country with one dominant hub carrier feeding a single gateway.
Between them these airports operate 5 runways serving 3 cities, all on a single national clock. Every airport below links to a live map of aircraft observed within available ADS-B coverage around the field.
The airports are spread across roughly 1 degrees of latitude and 7 degrees of longitude. The network is geographically compact enough that most domestic sectors remain comparatively short. Field elevations vary less dramatically than they do in the world's mountain-airport networks. The average across this selected set is 1.2 runways per airport.
Read airport by airport, the selected Romania network is not interchangeable: Henri Coanda International Airport (OTP) has 2 runways and about 14.9 million annual passengers, Mihail Kogălniceanu International Airport (CND) has 1 runway and no comparable traffic figure, Timișoara Traian Vuia International Airport (TSR) has 1 runway and no comparable traffic figure and Bucharest Băneasa Aurel Vlaicu International Airport (BBU) 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.
With 4 gateways in this data cut, the Romania hierarchy is readable directly: OTP contributes 99% of the represented passenger total, CND contributes 0% of the represented passenger total, TSR contributes 0% of the represented passenger total and BBU contributes 0% of the represented passenger total. That makes OTP the first gateway here without reducing CND to a minor field, since its traffic is about 0% of OTP's.
The physical ranking differs from the traffic ranking: OTP has 2 listed runways, CND has 1 listed runway, TSR has 1 listed runway and BBU has 1 listed runway. CND is the highest of the group at 353 ft, against 297 ft at BBU. Those facts describe layout and setting, not a live capacity forecast; weather, active runway configuration and traffic flow still decide what a viewer sees on the map at a given hour.