Some are so sensitive that merely touching a surface contaminated with an allergen can set off a life-threatening reaction called anaphylaxis, which causes swelling, hives, lowered blood pressure, shock and constriction of the airways. The reaction can be fatal.
But in recent years, families who asked to preboard or sought information about food served on a flight have been barred from flying or even escorted off planes after taking their seats. The tension and uncertainty have made some passengers reluctant to disclose food allergies.
No one tracks in-flight medical emergencies, but they are believed to be relatively uncommon; chest pain and heart attacks are the most common reasons that flights are diverted, according to one study. Allergic reactions comprise fewer than 4 percent of in-flight-medical emergencies.
Two other complaints against American Airlines were dropped by the D.O.T. after the company quietly changed the policy prohibiting preboarding for people with food allergies late last year.
All customers with peanut and tree nut allergies are now allowed to preboard and wipe down surfaces, according to an airline spokeswoman.
The change is not detailed on the airline’s website, which continues to warn that nuts are served onboard and that the airline “can’t accommodate requests to not serve certain food or to provide nut buffer zones” and “can’t guarantee you won’t be exposed to peanuts or other tree nuts during flight.”
Many airlines have policies that accommodate passengers with nut allergies, though disabilities-rights advocates complain that the policies are not consistently enforced.
Initially, a United spokesman said preboarding depends on circumstances such as the size of the plane, the availability of agents and whether the flight is on time. Another representative said later that preboarding is “not an announced policy even though we allow it.”
The D.O.T. decision was based on the presumption that passengers with severe food allergies are disabled and eligible for protections under disabilities rights laws.
In a similar case, a federal appeals court recently cleared the way for a lawsuit against a restaurant in Virginia’s Colonial Williamsburg, that did not allow a child with severe celiac disease to eat a gluten-free meal he brought from home.
The fifth-grader had paid for the meal, but was escorted out of the tavern by a waitress in an 18th-century costume to eat on the back porch in the rain, according to his father, who was a chaperone on the school trip.
The Colonial Williamsburg Foundation has petitioned the United States Court of Appeals for the Fourth Circuit to reconsider its decision, arguing the case is of “exceptional importance” and could “jeopardize the lifeblood of the food service industry.”
The American Airlines complaint and the restaurant lawsuit were brought by Mary C. Vargas, a lawyer in Washington specializing in disabilities-rights cases. Both decisions relied in part on an amendment to the Americans With Disabilities Act in 2009 that broadened the definition of disabilities to include conditions like severe food allergies or hearing loss.
“What these cases show is both that society is starting to understand that this isn’t a joke, and that the agencies that enforce disabilities-rights laws are starting to understand that this is real,” said Eve Hill, a lawyer in Washington who counsels companies on disability issues. “Serious food allergies are disabilities.”