Berlin Tegel Airport continued operating its daily non-stop Tegel–JFK service until Delta Air Lines assumed most of Pan Am's transatlantic scheduled services during 1991. Pan Am Express, which was not included in Pan Am's IGS sale to Lufthansa, continued operating all of its domestic and international regional scheduled routes from Tegel as an independent legal entity until its acquisition by TWA in 1991. Following TWA's takeover of Pan Am Express, the former Pan Am Express Berlin operations were closed. Until December 1994, Lufthansa also contracted Euroberlin to operate some of its internal German flights from its new Tegel base, making use of that
Berlin Tegel Airport million. This included Pan Am's internal German traffic rights as well as its gates and slots at Tegel. This agreement, under which Lufthansa contracted up to seven of Pan Am's Tegel-based Boeing 727-200s operated by that airline's flightdeck and cabin crews to ply its scheduled routes to Munich, Nuremberg and Stuttgart until mid-1991, also facilitated Pan Am's orderly exit from the internal German air transport market after 40 years' uninterrupted service as European Union (EU) legislation prevented it from participating in the internal air transport market of the EU/European Economic Area (EEA) as a non-EU/EEA headquartered carrier. However, Pan Am