Yes, you can typically take two vapes—and often more—on a plane in 2026, provided they are kept in your carry-on luggage or on your person. FAA and TSA regulations strictly prohibit vapes and electronic cigarettes in checked baggage due to the fire risk posed by lithium-ion batteries. While there is no specific federal limit on the number of devices for personal use, you must ensure each battery is under 100 watt-hours. A high-value "pro-tip" for 2026 is to disconnect the battery from the tank if possible and store any extra e-liquid in containers under 100ml (3.4 oz) within your clear liquids bag. Always check your specific airline's policy, as some international carriers may have a cap on total lithium batteries (often around 15–20 per person) and certain countries have local bans on the devices themselves.