Short answer- yes. Long answer subject to memory loss: DL LAX-SYD daily. UA LAX-SYD daily, SFO-SYD daily, SFO-MEL daily, IAH-SYD 4X weekly. I am not sure about LAX-MEL. Hopefully someone will chime in with the correct info!

I think it is important for Australia to have two viable airlines. When VA was flying to the US the DL partnership worked to some degree. But with VA's bankruptcy and restructuring they will drop all long haul. They now need a US partner who will deliver passengers to them and a partner who wants to work with them. OZ seems to be more of an after thought to DL, a check-the-box type of destination as in yeah, we fly there, too.