An Epipen gives you about 15 minutes of life, if you have an anaphylactic response to an allergen. After that, you'll need an emergency tracheotomy. Peanuts are one of the most deadly allergies, so I think I would think twice about flying, if I were the patient, and arrange some other mode of transportation. With or without the airline taking action, the risks for a peanut sensitive person, especially a child, are too great.