How many miles from doha to Perth Australia?

A random search shows: OPTION 1:

DOH - DXB Emirates Airlines Flt 846 Dep 11:15pm 24Apr,Fri/29May,Fri

DXB - PER Emirates Airlines Flt 420 Dep 02:35am 25Apr,Sat/30May,Sat

Flight Duration: 13hr 10min; Layover Time: 1hr 20min; Total Trip Time: 14hr 30min