You don't have much choice domestically - people go with whoever has routes and capacity. VA had to give up it's leased aircraft and sold others, the fact they they are anywhere near QF is laughable (for Qantas).
International numbers would be more interesting - where I believe SQ is leading.
SCM, you're correct.
This what the Commonwealth Government's BITRE had to say re April 2022:
In terms of passenger carriage, Singapore Airlines had the largest share of the market
in April 2022 with 17.9 per cent of the total followed by Qantas Airways with 15.7 per
cent, Air New Zealand with 11.1 per cent, Emirates with 10.0 per cent and Qatar
Airways with 6.8 per cent.
- The Qantas group – Qantas Airways, Jetstar (6.0 per cent) and Jetstar Asia (0.3 per
cent) accounted for 22.0 per cent of total passenger carriage in April 2022. The group’s
share was 20.1 per cent in April 2021 and 26.5 per cent in April 2019...
---------------
It's amazing that SQ leads given it doesn't serve, or requires roundabout connections to/from, numerous destinations that QFi does. Is it practical to use SQ to SIN to go to NOU, or AKL/CHC/WLG?
As more routes return, one would expect QFi's and JQi's combined share of passengers to rise, but it is unlikely to exceed 33 per cent.
For instance, QFi isn't flying to/from Japan, as the vast majority of Australians cannot travel to that nation, and may not be able to do so for a while. Competitors JL and NH are flying, presumably existing largely on Japanese citizens' patronage.
So most international air users in and out of Oz don't choose the Qantas Group.