Packing skincare for a 2026 flight requires strict adherence to the TSA 3-1-1 rule for carry-on luggage. All "liquids" (which includes creams, gels, pastes, and aerosols like sunscreen or face wash) must be in containers of 3.4 ounces (100ml) or less and fit into a single, quart-sized, clear plastic zip-top bag. To maximize space, savvy travelers "decant" their favorite products into smaller travel-sized jars or use "solid" alternatives like bar cleansers and stick moisturizers, which are exempt from the liquid rule. For checked bags, where there is no size limit, you should "seal and wrap" your products; the change in cabin pressure can cause bottles to leak, so placing a piece of plastic wrap over the opening before screwing on the cap creates a tighter seal. Always pack your skincare in the center of your suitcase, surrounded by soft clothing, to protect glass bottles from breaking. If you are flying in a modern "CT Scanner" lane (common in major UK and US hubs in 2026), you may not even need to remove your liquids bag from your luggage, but having it organized remains the "gold standard" for efficient travel.