Airport security has been increased across Australia and all passengers are being told to arrive early -- as part of the government's response to terror threat.
Jetstar and Virgin Australia have upgraded their advise from one hour, also telling passengers to limit carry-on and checked baggage to ensure a efficient screening processes.
International travellers should arrive three hours before their fight departure time.
The extra check-in time is needed because of "additional scrutiny" -- and security experts say the arrangements will likely be in place for the foreseeable future.
