For frequent flyers and occasional travelers alike, the 3.4-ounce TSA liquids rule has long been a familiar aspect of air travel. Officially known as the “3-1-1” rule, it limits passengers to containers of no more than 3.4 ounces (100 milliliters) of liquids, gels, or aerosols through security. This restriction dates back to a thwarted terrorist plot in 2006, which aimed to smuggle liquid explosives onto aircraft. Though initially intended as a temporary measure, the rule has persisted for nearly two decades.
U.K. Advances and Setbacks
Recent developments in the U.K. and Europe have sparked speculation that a change in this rule might be on the horizon. In 2022, the U.K. began deploying new Computed Tomography (CT) scanners capable of screening larger volumes of liquids—up to two liters per container. These advanced machines offer enhanced detection capabilities, allowing for a more streamlined security process. Airports such as London City have already adopted this technology, which has been seen as a competitive edge in the notoriously stringent British security environment.
European Union Follows Suit
However, contrary to earlier expectations, the U.K. government announced in June that all airports will continue to enforce the 100-milliliter liquid limit, regardless of the installation of these new scanners. This decision has been a blow to travelers hoping for more relaxed regulations. Similarly, the European Union has followed suit. Despite the rollout of new CT scanners at several airports across Germany, Ireland, Italy, the Netherlands, and Sweden, the EU has also confirmed that the 100-milliliter limit will remain in place for the foreseeable future.
U.S. TSA’s Long-Term Plans
In the United States, the situation is similarly cautious. The Transportation Security Administration (TSA) is in the process of deploying CT units capable of screening larger volumes of liquids. However, a TSA spokesperson has indicated that significant changes to the current 3-1-1 rule are not imminent. “We anticipate that it may not be until 2040 before CT units are fully deployed across the nation and we have the capability to revise the liquid limits,” the spokesperson told Travel + Leisure.
Conclusion
While technological advancements are paving the way for potentially more flexible liquid rules in some regions, significant changes to the TSA’s 3-1-1 rule remain a distant prospect. Travelers should continue to adhere to the current regulations until further notice.