The N.A.A.C.P. on Tuesday warned African-Americans to exercise caution when traveling on American Airlines, citing a pattern of “disrespectful” and “discriminatory” behavior from the company.

The organization’s warning came in the form of a travel advisory that described four recent times when black passengers were said to have been discriminated against. The N.A.A.C.P. said the similarity of the episodes suggested “a corporate culture of racial insensitivity and possible racial bias.”

Derrick Johnson, the N.A.A.C.P.’s new president, said that he expected to meet with airline leaders “to air these grievances and to spur corrective action.”

“All travelers must be guaranteed the right to travel without fear of threat, violence or harm,” he said in a statement. “The growing list of incidents suggesting racial bias reflects an unacceptable corporate culture and involves behavior that cannot be dismissed as normal or random.”