Airlines Have No Consistent Nut Allergy Policy and Cabin Air Spreads Proteins

There is no U.S. federal regulation requiring airlines to accommodate passengers with nut allergies. Each airline sets its own policy, and these policies range from "we won't serve peanuts on your flight if you notify us" (Delta, pre-pandemic) to "we take no responsibility; fly at your own risk" (several low-cost carriers). A passenger with a severe peanut allergy cannot know in advance whether the airline will serve peanut snacks, whether nearby passengers will open peanut products, or whether the aircraft was cleaned between flights. This matters because aircraft cabins are pressurized, recirculated environments. While HEPA filters capture particulates, peanut protein can become aerosolized when bags are opened, and in a sealed tube at 35,000 feet, a sensitized passenger in row 14 can react to peanuts being eaten in row 12. A study published in the Journal of Allergy and Clinical Immunology found that 41% of airline passengers with peanut allergies reported allergic reactions during flights. Unlike a restaurant, where you can leave, a passenger at cruising altitude has no exit. The nearest hospital is potentially hours away. For families with allergic children, this turns air travel into a risk-management nightmare. Parents report wiping down seats, tray tables, armrests, and seat-back screens with sanitizing wipes before their child sits down. Some families drive instead of fly, even for distances exceeding 1,000 miles, because the risk calculus favors 15 hours in a car over 3 hours in an uncontrolled allergen environment. This effectively limits economic mobility, family connections, and access to medical specialists for allergic children in geographically isolated areas. The FAA has studied the issue and in 2023 reported to Congress that it found "insufficient evidence" to mandate peanut-free flights, a conclusion that allergy advocacy groups strongly disputed. The structural reason this persists is that airlines categorize allergen accommodation as a customer-service preference rather than a safety requirement, like wheelchair access or oxygen masks. The Air Carrier Access Act covers disability accommodations but does not explicitly include food allergies, creating a legal gray zone. In the first place, the aviation industry's approach to allergen safety is approximately where the restaurant industry was 20 years ago: voluntary, inconsistent, and dependent on individual goodwill rather than systemic safeguards. Until food allergies are recognized as a disability under federal transportation law — as they are under the ADA in other contexts — airline policies will remain a patchwork that fails the most vulnerable passengers.