In some designs also a line U7 was provided, which should connect the Floridsdorf and Donaustadt districts Floridsdorf station, Kagran and Aspern east of the Danube running.
I nogle planer var der desuden forudsat en linje U7 mellem bydelene Floridsdorf og Donaustadt, som skulle forbinde stationerne Floridsdorf, Kagran og Aspern øst for Donau.