New technology helping airport lines - but passengers still warned to expect queues

New technology is helping to streamline the boarding process at Sydney Airport, after months of delays and long lines.

With more school holidays on the horizon, a new 3D scanner means there's no need to take out liquids or laptops for passengers flying Qantas domestically.

Jessica Thai from Certis Security said it saves valuable minutes.

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"It is a lot quicker (you) don' have to remove these item and repack," she said.

Jetstar and Virgin will install the scanners later in the year.

However, long lines won't disappear, Geoff Culbert from Sydney Airport warned.

"I'm not going to sugar coat it," he said.

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"This is the tightest labour market, everyone is struggling to recruit staff."

During the height of COVID-19 restrictions the airport lost 15,000 workers, and it's still 5000 short.

That includes a lack of baggage handlers.

The staffing issues have meant a new hotel at the International Airport can't open as there isn't enough workers to staff it.

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The advice for the school holidays is to get to the airport earlier two hours for domestic travel, and at least three hours if you're going overseas.