Delayed yet again..

Last time I flew Jetstar from launceston, experienced a 3 hour delay ...check in staff commented they were running one plane short all day . Now waiting for my sister flight 740 from Launceston due 7.30 pm....delayed until 1230 am...5 hour delay!! I've been warned no more Jetstar

Domestic
Australia-Launceston
Australia-Melbourne - Tullamarine