Hundley became increasingly obnoxious and appeared intoxicated during the flight and complained that her son was too big to sit on her lap, she said.
"He reeked of alcohol," Bennett told KARE-TV. "He was belligerent, and I was uncomfortable."
Bennett said she was shocked by the racial slur she says Hundley used when Jonah started crying.
"And I said, 'What did you say?' because I couldn't believe that he would say that," she told WCCO-TV. "He fell onto my face and his mouth was in my ear and he said it again but even more hateful. And he's on my face, so I pushed him away."
Bennett and her husband are white, while Jonah, whom they adopted, is black.
"We wish to emphasize that the behavior that has been described is contradictory to our values, embarrassing and does not in any way reflect the patriotic character of the men and women of diverse backgrounds who work tirelessly in our business," Haase said in his statement.