Rex have $69 flights between Melbourne and Canberra starting 10 June 2021 operating a twice-daily service on a Boeing 737-800NG.
Virgin are matching their price and appear to have more availability. Weekends are included
Virgin flights to Canberra
Plenty of fares available. Both airlines include 23kg baggage
Make use of the vouchers for residents / visitors https://www.ozbargain.com.au/node/624013