The answer to this question depends on the size and weight of your Arduino. You can typically carry an Arduino Leonardo or Microcontroller in your checked luggage, provided that it is not too large or heavy. However, because Arduinos are electronic devices, they are prohibited from being carried in your carry-on baggage. If you need to travel with an Arduino in your carry-on bag, you should take it with you on the plane and set up a mini-Arduino camp at your seat.