Dallas or New York to Australia from $785 Roundtrip

Fly from Dallas or New York to Melbourne, Brisbane, or Sydney Australia from $785 roundtrip.
Airlines: American Airlines, Qanatas, United
Availability: Showing almost all of 2017 when I searched.
*When I searched on Priceline , prices were showing up cheaper than google.
Dallas to Melbourne- $790
Brisbane- $785
Sydney- $826
New York to Melbourne- $842
Brisbane- $851
Sydney- $882