For many travelers, the security line is the least enjoyable part of flying. No matter how well you pack or how organized you are, the process often feels stressful and time-consuming. With hundreds of thousands of passengers passing through airport checkpoints every hour, the rules around liquids and electronics have become a constant source of frustration.
When restrictions on carrying liquids, aerosols, and gels were introduced in 2006, they were intended as a temporary measure to counter security threats. Nearly two decades later, the 100ml rule remains in place at most airports, requiring travelers to transfer toiletries into clear bags and remove laptops from their carry-ons. Promises of relaxed rules have surfaced over the years, but technical and financial challenges have delayed progress.
Cabin Baggage Rules Today
Over time, the list of prohibited items in hand luggage has grown in response to evolving threats. Weapons of any kind are, of course, banned, but even food items like yogurt or soft cheese fall under liquid restrictions. Containers larger than 100ml are not allowed, and most airports require passengers to place approved liquids in resealable one-litre bags for screening.
How CT Scanners Work
The introduction of advanced CT scanners at select airports marks an important shift. These machines, similar to those used in hospitals, can produce 3D images of luggage contents and identify potential risks with far greater accuracy. They are capable of analyzing both liquids and electronics without requiring passengers to unpack them.
For travelers, this technology means a much smoother experience. No more pulling out laptops or rearranging bags at the last minute. For airport staff, it allows security officers to focus on higher-level assessments rather than spending time on repeated manual checks. The result is not only more efficient but also more reassuring for passengers.
Progress and Setbacks
The rollout of CT scanners hasn’t been straightforward. In Europe, Shannon Airport in Ireland was one of the first to adopt the technology in 2022, allowing liquids of any size through security. In the UK, airports were told to implement the new scanners by the end of 2022, but the pandemic slowed progress. Some airports have since introduced the equipment, even advertising relaxed liquid rules of up to two liters. Yet in mid-2024, authorities unexpectedly reinstated the 100ml rule, even at locations already equipped with the scanners. The only difference is that passengers can now keep liquids inside their bags, provided each container is still under 100ml.
Global Inconsistencies
One of the biggest challenges for travelers is the lack of uniformity in security rules worldwide. In some countries, liquids can remain in bags, while in others, they must be removed. Laptops are required to come out at many airports but not all. Israel, for example, has unique procedures that include detailed questioning and mandatory laptop removal, but liquids are permitted without size restrictions. Meanwhile, a few small airports in Scotland have done away with security checks altogether since 2017.
The introduction of CT scanners adds another layer of inconsistency, with rules differing not just from country to country but even from airport to airport. For this reason, I’ve made it a habit to check the security requirements of the airport I’m flying from a day or two before departure. It helps me avoid surprises, delays, and the frustration of having my bag opened unnecessarily.
As air travel continues to evolve, CT scanners may eventually bring more consistency and convenience. Until then, staying informed remains the best way to make airport security as smooth as possible.
