"You can expect longer delays to make sure that more screening is being done on baggage, both hold luggage as well as hand luggage", he said, adding that travellers should allow more time to get through security.
Lines ahead of the security screening area at SydneyAirport formed well before sunrise, affecting Qantas and Virgin Australia passengers.
Turnbull declined to say whether the group was guided by someone overseas.
The four men were arrested from raids in the Sydney suburbs of Surry Hills, Lakemba, Wiley Park and Punchbowl.
Late on Sunday, police said they had been granted a special seven-day extension in the New South Wales Magistrates Court to continue interrogating the four suspects without pressing charges.
Commissioner Andrew Colvin said police had recently become aware of information suggesting people in Sydney were planning to commit a "Islamist inspired" terrorist attack using an improvised explosive device.
"We do believe it is Islamic-inspired terrorism", he said.
It added that it was not yet known whether the flight number was related to the alleged terror plot.
News of the arrests was first announced on Saturday, in a press conference fronted by Colvin and Turnbull, who described the plot as an "elaborate conspiracy".
While commuters at SydneyAirport and Adelaide Airport faced a chaotic scene of long queues as a result of the additional screening methods, Brisbane Airport was largely spared from delays or extra waiting times.
"Police will allege they had the intent and were developing the capability", Turnbull told Australian Broadcasting Corp.
The Sydney Morning Herald also reported that a mincer was being examined, while The Australian newspaper cited multiple sources as saying it was a "non-traditional" device that could have emitted a toxic sulphur-based gas, which it said would have killed or immobilised everyone on board.
Authorities have increased security measures at Australian airports, prompting lengthy queues and passenger confusion.
The plot was the 13th significant threat disrupted by police since Australia's terrorist threat level was elevated in 2014, Justice Minister Michael Keenan said.
Most flights have been leaving on time despite the delays.
Critics say the body is a step towards a dictatorship, by bypassing or dissolving the opposition-held National Assembly. Three of the "shadow" judges have been arrested in the past few days by Venezuelan intelligence officials.
In addition, low viral levels also dramatically lower the risk of her passing on the virus to others, although not completely. But a reservoir of virus was found in a few immune cells, although none of it was deemed capable of replicating, they said.
However, durability is still a huge issue for him as he can not stay healthy during the National Basketball Association season. He showed that he could still play in the National Basketball Association , getting to the rim and finishing.
Sam Greaves, Missile Defense Agency director. "A medium-range target ballistic missile (MRBM) was air-launched by a U.S. Air Force plane over the Pacific Ocean and intercepted by the system located in Alaska, according to an MDA release.
He is always an important player not because he scores but because of the positions that he is able to take on the pitch". Gab Marcotti breaks down Bayern Munich's relatively young and new squad and what the future holds for them.
The plaintiff was eventually diagnosed with herpes after suffering from vaginal sores, fevers and chills, she alleged in papers. It turns out that the woman in question, Maya Fox-Davis, was a bridesmaid in Usher's wedding to his first wife, Tameka Foster.
USA officials are skeptical, however, that North Korea and Iran are coordinating their rocket and missile launches. The North last week refused to respond to the South's offer to open dialogue to ease tension.
Earlier this month, Iraqi forces, after months of battle with ISIS, rooted out the terrorist organisation from the soil of Mosul. External affairs minister Sushma Swaraj (centre) met family members of 39 Indian youths missing in Iraq since June 2014 in Delhi.
In June, a company executive identified the seven as Illinois, Indiana, Michigan, Ohio, Pennsylvania, Texas and Wisconsin. The Lehigh Valley could still be in play for a Foxconn facility, one of the world's largest electronics manufacturers.
Istrate cautions that "all of these elements will make team play, communication, and strategic skills more crucial than ever". If you are unable to view video showing the first look at PvP in your region, try the Ubisoft UK channel .
He won the Grand Prix of Long Beach in April and was third in the first of two races at the Detroit Grand Prix in June. Newgarden, who also won here in 2015, came out in front on Lap 25 after a crash by Tony Kanaan caused a caution.
Trump pledges U.S. aid in Lebanon fight against IS
Of Republican Senators Susan Collins (ME) and Lisa Murkowski (AK), who both voted against the motion, Trump said only, "It's sad". Whilst the group is Lebanese, it is strongly backed by Iran, and its political wing is very influential within the country.
Switzerland chainsaw attack: Suspect arrested in Thalwil
Authorities had issued an worldwide arrest warrant for Wrousis, whom they described as aggressive and psychologically unstable. A shop owner told Swiss newspaper Blick a man with a chainsaw was walking the streets and police later confirmed the report.
Cowboys Release WR Lucky Whitehead After Reported Arrest
Don't we all when are surprised an accusation out of left field? When officers arrived, they located the man in the parking lot'. They said the alleged shoplifting incident happened hours before Whitehead's flight from Dallas to Washington, D.C., departed.
UK Parents Drop Bid to Send Charlie Gard to US
However, Judge Nicholas Francis had scheduled the two-day hearing for this week to consider fresh evidence after Dr. The judge paid tribute to the infant's parents, saying it was impossible to comprehend the agony they faced.
Audi Commercial in China Compares Women to Used Cars
It's an ad from Ogilvy & Mather Beijing promoting used Audis that have been checked out and officially certified for resale. An animation in the same ad encourages viewers to visit a website selling "Audi-approved" secondhand cars.
US Congress Grants Baby Charlie Permanent Resident Status
Court proceedings have been running for months after GOSH applied to withdraw treatment and allow Charlie to " die with dignity ". This comes ahead of further court hearings expected at the end of this week, and a ruling on Charlie's future care next week.
US Declares Iran complying on Nuclear Deal
The statement also criticised Iran's support for the Syrian government and groups such as Hezbollah and Hamas . He chose not to elaborate on the issue until the State Department's full statement regarding the Iran deal.
Martin Landau, Oscar-winning actor, dies aged 89
Landau and Bain left the show in 1969, working together again in the cult English sci-fi series Space: 1999 in the mid-70s. Ironically, Nimoy replaced Landau on "Mission: Impossible ". "There was a 10-year period when everything I did was bad.
UK, EU negotiators to 'get down to work' on Brexit terms
Davis added that apart from citizens' rights and the UK's exit bill, Northern Ireland issues are also a priority of these talks. Mr Davis said they made a "good start" at last month's preliminary talks - but it was now time to "get to the nitty-gritty".