Traffic in Portugal is heavily concentrated: Humberto Delgado Airport (LIS) alone handles about 33.6 million passengers a year, roughly 69% of the 49 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 4 cities, and the country spans 3 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 Francisco Sa Carneiro Airport (OPO) at about 15.5 million passengers. The gap to LIS is 18.1 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 9 degrees of latitude and 17 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 1.2 runways per airport.
Read airport by airport, the selected Portugal network is not interchangeable: Humberto Delgado Airport (LIS) has 2 runways and about 33.6 million annual passengers, Francisco Sa Carneiro Airport (OPO) has 1 runway and about 15.5 million annual passengers, Cristiano Ronaldo International Airport (FNC) has 1 runway and no comparable traffic figure and João Paulo II Airport (PDL) 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 Portugal hierarchy is readable directly: LIS contributes 69% of the represented passenger total, OPO contributes 32% of the represented passenger total, FNC contributes 0% of the represented passenger total and PDL contributes 0% of the represented passenger total. That makes LIS the first gateway here without reducing OPO to a minor field, since its traffic is about 46% of LIS's.
The physical ranking differs from the traffic ranking: LIS has 2 listed runways, OPO has 1 listed runway, FNC has 1 listed runway and PDL has 1 listed runway. LIS is the highest of the group at 374 ft, against 192 ft at FNC. 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.