The Venture is a commercial spacecraft built in National City designed for sub-orbital travel in space.
Many rich passengers had been brought along the flight. However both Cat Grant and Lena Luthor had turned down the offer.
It was later brought down due to a hidden explosive set by John Corben in seat 23B, where Lena was originally going to be sitting in. The oscillator turned out to be the only victim due to Lena turning down being on the Venture. The ship was going to crash until it was saved by Superman and Supergirl.