Federal authorities say 37-year-old Gill Parker Payne, of Gastonia, North Carolina, entered the plea Friday. He was charged with using force or threat of force to obstruct a Muslim woman in the free exercise of her religious beliefs.
The two were on a Dec. 11 flight from Chicago to Albuquerque when the confrontation happened.
Authorities say Payne approached the woman, who was sitting several rows in front of him, and told her to take off her hijab — an Islamic-style headscarf — saying, "This is America!" He then removed the hijab from her head.