Car parking and airline fees are making Australian airports increasingly profitable - despite passenger numbers still tracking below pre-pandemic times. The ACCC says the nation's four biggest airports combined - that's Sydney, Melbourne, Brisbane and Perth - made a one-billion dollar operating profit from aeronautical services... paid for, by airlines. Car parking made them $388-million - with Brisbane reporting the highest profit margin. But it was senior management of Australia's two biggest airlines who faced some turbulence today, as they faced questions about consumer compensation at a parliamentary inquiry.