Better to ask in the AS forum if using AS miles. You are very limited by the AS award chart.
DXB is not really
on the way to Australia. Fiji a
little less, as FJ is an AS partner
But the actual route / airlines is another matter.
Premium cabin awards USA-Australia are very hard to get. A lot of people trying for these
Airlines that fly USA/Canada to/from Australia (not from all airports to all airports)
-
American Airlines AA (LAX - SYD) [OneWorld Alliance] (AS partner)
-
Air Canada AC (YYR – SYD, BNE from Jun 2016) [Star Alliance]
-
Air New Zealand NZ (LAX SFO IAH YVR via AKL) [Star Alliance]
-
Air Tahiti Nui TN (LAX via Tahiti. Last segments on codeshares) (AA & DL partner)
-
Delta DL (LAX – SYD) (VA & AS partner) [Skyteam Alliance]
-
Fiji Airways FJ (LAX SFO HNL via Fiji) (QF, AA & AS partner)
-
Hawaiian HA (HNL – SYD BNE via Hawaii) (AA & VA partner)
-
Jetstar JQ JQ (HNL – SYD BNE)
-
Qantas QF (LAX SFO JFK DFW HNL YVR*– SYD BNE MEL) [OneWorld Alliance] (AS partner) {* seasonal}
-
United UA (LAX SFO – SYD MEL) [Star Alliance]
-
Virgin Australia VA (LAX – SYD BNE) (DL partner) MEL LAX restarting 4 April 2017
And others via Asia & Middle East