Indeed, it is possible to take a portable speaker on a plane. Nonetheless, there are a few limits about the size and power of your speaker. Bluetooth belters at around $seventy nine / £seventy nine. It is not profitable any awards for design, but it's IP67 water- and dustproof https://www.bluetoothspeaker.top/waterproof-dustproof-hands-free-magnetic-lavaliere-speaker-clip-bluetooth-speaker/