Air Services Australia Monthly Movement report shows aircraft movements for the major airports. I don't think the May report has been released so these numbers are for the month of April 2020.Nonsense. I've seen this crap parroted about by Melburnians (claiming that it's all Sydney's fault because of the curfew), but with no real evidence to back it up.
1. Perth ==> 5,914
2. Brisbane ==> 4,514
3. Sydney ==> 4,358
4. Adelaide ==> 2,854
5. Melbourne ==> 2,426
Perth and Brisbane have become the busiest capital city airports. It should be noted that most of this movement in those airports is due to intrastate travel with FIFO making a large part of that. Melbourne being a smaller state, geographically speaking, has very little reliance on air-travel for intrastate purposes.
When you focus only on larger aircraft types (of which most of the international arrivals are) then the mix looks like this
1. Sydney ==> 1,744
2. Melbourne ==> 748
3. Brisbane ==> 262
3. Perth ==> 262
5. Adelaide ==> 6
This is aircraft movements only and does not reflect passenger numbers or load factors on those flights and would also include freight only flights too.
Regardless, the argument that there are less flight movements to Sydney (and adding to Melbourne's) because of the curfew are incorrect.