Pan Am's Internal German Service once outpaced US domestic flights in 1980

During the Cold War era, Pan American World Airways maintained a unique and extensive domestic network within West Germany known as the Internal German Service (IGS). Remarkably, in 1980, Pan Am flew more domestic departures in West Germany than it did in the United States, according to historical schedule data. This operation arose from the post-World War II division of Berlin and restrictions that allowed only American, British, and French airlines to serve the city, excluding German carriers like Lufthansa.

After the war, Berlin was divided into four occupation zones controlled by the Allied powers, with West Berlin surrounded by East Germany’s Soviet-controlled territory. The city’s air corridors remained a vital connection, especially given the road restrictions imposed during divided Germany. Because Lufthansa was barred from operating in West Berlin, Pan Am became the primary American airline serving the city, starting operations at Tempelhof Airport and competing alongside British European Airways and Air France.

By the late 1950s, Tempelhof’s short runways became unsuited for jet aircraft, prompting Air France to move to Tegel Airport in the French sector. Pan Am initially kept its operations at Tempelhof thanks to jets capable of short-field performance but eventually shifted completely to Tegel in 1975 along with British Airways. Despite reduced demand due to eased road travel restrictions, Tegel remained essential to West Berlin’s connectivity.

The IGS network spanned numerous routes connecting Berlin to various West German cities through core and experimental connections, some of which were very thinly served even then, such as Sylt. In the late 1980s, Pan Am introduced regional ATR aircraft under the Pan Am Express brand operated by Ransome Airlines, attempting to optimize the network's reach.

Throughout the 1980s, Pan Am dominated Berlin Tegel's flight operations until the late decade, when Euroberlin France emerged as a joint venture between Air France and Lufthansa. Euroberlin’s presence increased following the fall of the Berlin Wall and Germany's reunification in 1990, which led to Lufthansa replacing Euroberlin and contesting the market once barred to it.

With reunification and the lifting of air traffic restrictions, several new carriers launched Berlin services, causing Pan Am’s unique position to disappear. The airline exited the Berlin market in 1991 and ceased operations worldwide the same year. British Airways remained as a legacy carrier but sold a large stake to Delta Air Lines in 1992, which established Deutsche BA, further reshaping the Berlin aviation market.

Other Berlin airports experienced significant transformations as well. Tempelhof Airport, closed to commercial flights in 1975, briefly reopened scheduled services in 1985 but ultimately shut down permanently in 2008. Meanwhile, Schönefeld Airport, situated in East Berlin and dominated by the East German airline Interflug, saw declining traffic after reunification, resulting in Interflug’s closure in 1991.

Schönefeld’s site later transitioned to accommodating low-cost carriers like Ryanair and easyJet, serving as a critical hub after Tegel’s closure. Berlin Brandenburg Airport opened in 2020 on the Schönefeld grounds, consolidating Berlin’s air traffic. The historic runway used by Interflug is now one of Brandenburg’s runways, symbolizing the city’s layered aviation history.