You can bring your EpiPen onto a plane – they are a common medical device and they should not cause any fuss when you are going through airport security. You can carry them in your handbag, laptop bag, or other carry-on luggage. It is a very good idea to take your EpiPen with you on the plane because the small confines of an aircraft increase your odds of being exposed to a trigger allergen while you are flying and having an anaphylactic reaction.