Singapore Airlines, Lufthansa, SWISS, ANA, and Austrian are offering reduced price flights from London, United Kingdom to Brisbane (and other cities in Australia) for as low as £616! That works out to a cost of just about 3.6 Cents (Pence) Per Mile flown.
Luggage restrictions depend on the airline through which the ticket was bought. For the example flight below, operated by Singapore Airlines, checked-in luggage is included in the price of the flight. This makes for an even better deal!
Availability and changes in prices are dependant on the end-destination and the airlines. Here is a sample itinerary in late February 2021 (Feb 25 – March 6):