I didn’t know if you could do it, but I hid a small portable space heater in my suitcase.
When they x-rayed the suitcase and found the space heater, I had to go back to the main part of the airport and have the bag checked in and put in with the other luggage.
I had no need for the space heater on the plane and I couldn’t plug it in, so I didn’t know what all the furor was about. We were finally on the airplane and getting ready to take flight when I tried to turn on the heat vent. It was cold in the plane and I asked the flight attendant about the heat. She said it would turn on when we were in the air. I had a six-hour flight, and I was hoping the plane would get into the air before I froze to death. My jacket was overhead, and I was freezing. I could feel my bones aching from shivering, and I wasn’t the only one. I heard several children yelling they were cold, and I could see some older people who were uncomfortable. I grumbled about having a space heater, and the flight attendant heard me. She said they had some small heaters you could put on the footrest, but they couldn’t be used until they were at full altitude. By that time, I was going to be a popsicle. I was getting to where I could repeat her words about being at full altitude before they could turn any heat on, right along with her. After about twenty minutes, I could feel heat pouring out of the air vents.