Hundreds of security screening staff at Sydney Airport will walk off the job this Friday, and anyone flying domestically or internationally that day should expect slower queues and build in extra time.

The Transport Workers' Union has scheduled two four-hour stoppages — 6am to 10am and 5pm to 9pm — deliberately targeting the morning and evening peaks when terminals are at their busiest. The workers involved are Certis security employees, and the action is part of ongoing enterprise bargaining talks that have dragged on without resolution. The airport itself isn't directly part of the dispute, but it sits at the centre of the disruption.

At stake, according to the union, are job security basics: more full-time roles, fairer rostering and protection against cuts to part-time hours. TWU NSW State Secretary Richard Olsen has been blunt about it, arguing workers want full-time jobs and rosters that don't shift hour by hour, and that declining service standards are the cost of inaction. The union has also called on Sydney Airport to fund better conditions through its contracting arrangements, pointing to the hub's reported record aeronautical profit of $584.3 million in 2024-25.

Whether Friday's stoppages go ahead could hinge on crisis talks being held before then. Either way, Sydney Airport isn't waiting to find out. It has rostered additional baggage and passenger facilitation staff, is preparing contingency plans with airport partners, and is urging passengers to arrive early. The official advice: allow extra time to get through security, check your airline's messages before leaving home, and watch for updates as the day unfolds.

For travellers, the practical takeaway is simple. If your flight is on Friday, aim to arrive earlier than usual — the two strike windows line up with the heaviest departure periods, so morning and evening flyers will feel it most. Sign up for airline notifications, check your flight status before heading to the terminal, and don't cut it fine if you've got an international connection. If you're flying later in the day, keep an eye on the news: if the crisis talks succeed, the stoppages could be called off at short notice.

The timing matters beyond one Friday. Security queues at Sydney were already under scrutiny this winter, and prolonged industrial action could mean rolling disruption over coming weeks. The union has signalled it will keep pushing if it doesn't get movement, so frequent flyers through the hub should stay alert for further strike dates. Travel agents and anyone managing bookings for others are being told to keep clients posted too.

Sydney is Australia's busiest airport, so even a partial hit to security screening can ripple across dozens of flights and terminals. The stoppages are a negotiation tactic, not an attempt to close the airport — but at peak hours, a short walkout is all it takes to turn a 20-minute queue into an hour. Give yourself the buffer, pack patience, and the rest should take care of itself.