Yes, Elf Bars (disposable vapes) can go on a plane in 2026, but they are subject to strict safety rules regarding lithium-ion batteries and liquids. You must pack them in your carry-on luggage or keep them in your pocket. It is a federal crime to place them in checked baggage because the batteries pose a fire risk in the cargo hold. Since Elf Bars contain e-liquid, they count toward your TSA "3-1-1" liquid limit; you should place them in your clear, quart-sized plastic bag if they are not pre-packaged. Most importantly, you are strictly prohibited from using (vaping) or charging them while onboard. Be aware that in 2026, some countries (like Thailand, Singapore, and Australia) have extremely strict laws against vapes; arriving with an Elf Bar in these jurisdictions can lead to immediate confiscation or heavy fines at customs.