Virgin Australia domestic planes sometimes board without jetways (even in airports with jetways). I believe this is to save on landing fees. When they do this

Virgin Australia domestic planes sometimes board without jetways (even in airports with jetways). I believe this is to save on landing fees. When they do this, they open front and back doors with stairs. These planes board significantly faster than using a jetway and single door, even accounting for people having to go down stairs and across the tarmac.