Peanut allergy is caused when the body's immune system mistakenly identifies proteins in peanuts as harmful and releases chemicals that trigger allergic symptoms.
Her family says the teenager experienced an allergic reaction to a cookie containing nuts.
Lianne Mandelbaum said she felt "threatened" after she spoke to flight crew.
A Northwestern University study estimated that 1.5 million Americans have a sesame allergy.
Parents say their two teenage sons were kicked off a flight because one of them has a severe peanut allergy.
Dunkin' Donuts Park, which is the home of the Hartford Yard Goats minor league baseball team, is banning peanuts and Cracker Jacks from its premises.