Yes, you can generally take an electric space heater on a plane, but the rules vary depending on whether it is in your carry-on or checked luggage. According to TSA guidelines, electric heaters are allowed in both carry-on and checked bags as they do not typically contain hazardous materials. However, if the heater has any specialized oil-filled components, it might be subject to stricter scrutiny or prohibited if the oil is considered flammable. The main hurdle is the size and weight; space heaters are often bulky and could easily exceed the dimensions for carry-on luggage, forcing you to check the item. Additionally, even if allowed by the TSA, individual airlines have the final say on what can be brought into the cabin. It is always best to check with your specific carrier beforehand. If you do pack it, ensure the cord is neatly wrapped and the unit is well-protected to avoid damage. Never attempt to use the heater during the flight, as aircraft electrical systems are not designed for high-wattage personal appliances.