No, it is not illegal to fly with a vacuum sealer in 2026, and you are permitted to carry one in both your checked and carry-on luggage. The TSA and other international security agencies view a vacuum sealer as a standard small kitchen appliance, similar to a toaster or a blender (without blades). If you pack it in your carry-on, you may be asked to remove it from your bag for separate X-ray screening, much like you would with a laptop or other large electronic device, to ensure the internal components do not obstruct the view of the rest of your luggage. While the machine itself is legal, you should be mindful of what you are vacuum sealing; if you are sealing liquids or gels, they still must comply with the 100ml rule for carry-ons. For 2026 travelers, vacuum sealers are actually a popular "pro" hack for maximizing space in a suitcase by compressing clothing into airtight bags, a practice that is perfectly legal and encouraged for efficient packing, provided the sealed bags can still be easily inspected if requested by security.