The other consideration - JQ actually don't own these aircraft - in all cases they have another majority stakeholder, who may not be particularly impressed when Jetstar start using one of the co-owned companies assets without telling them...
Perhaps not, however, the overseas Jetstar loss making adventures are being funded at the expense of Qantas.
A new A320 is $91.5 million.
Qantas owns 45% of Jetstar Japan x 24 aircraft = $988 million
Qantas owns 100% of Jetstar Asia x 19 aircraft = $1738 million (perhaps high assumed new prices)
Qantas owns 33% of Jetstar Hong Kong x 18 aircraft = $543 million
+an amount at Jetstar Vietnam, who knows.
An approximately $3.2billion outlay in aircraft here - funded by the retreat and non replacement of fleet of Qantas international, destroying its economy of scale it previously had and lumbering it with aircraft that every other airline has retired due to inefficiency.
In other words
14 A330-200's
or
11 B777-300ER's
or
13 B787-9's
just from Jetstar franchise fleet purchases, that are yet to make a return on investment. Jetstar Asia is 10 years old! Factor in start up costs and accumulated losses you could easily add a few more aircraft to the list above.
I just wonder now they have had to restructure the whole future of 110 A320 purchasing arrangements, how much more money has been lost.