Just checked skyscanner in Oct/Nov (also other months like Mar/Apr16) and found lots of deals SYD to LAX for around $740AUD its operated by Qantas sold by American Airlines.
New York from Sydney is around $840AUD !
Las Vegas from Sydney is around $794 AUD !
TORONTO Canada just $1045 AUD (around $500 less than next cheapest)
Vancouver From Sydney (Mar/Apr 16) $1008