They never operate the aircraft that's why!

YQW just planned CBR-SYD as QJE6204

Farnsy or Melba has been on the SYD-CBR-SYD run today.

"It is not all over till the fat lady sings"

YQW is back in SYD with a ferry flight number 6204. More revenue flights tomorrow?

YQW planned SYD-HBA-SYD Monday.

Crew need a day off!

A220 flights seem to be cancelled an awful lot. Is it crewing issues or reliability issues? Last night's SYD-HBA cancelled, with most passengers told they'd have to wait another 24 hours to fly home. I was one of these passengers and the agent told me that the flights today are now "overbooked." Hardly filled me with confidence!

You may score a B717 flight. Could be the last, who knows ?

I think it's a bit of both. The A220 fleet worldwide has had terrible reliability due to poor engines and general supply chain issues; even the world's largest operators like Delta and Air Canada have had to ground a large portion of their fleet. I saw recently that a third of all Airbus new narrowbody aircraft (NEO and A220) are currently grounded over reliability concerns.
Expect the same with Qantas' A321XLR.

At this stage it’s a lack of crew owing to the poor conditions, pure and simple.