The man was removed from a Ryanair flight in Portugal over the incident in which he denies punching the attendant and said he was left injured by police and emotional.
David Mesher apologized for what he said to the 77-year-old woman.
The male passenger yelled, "Don't talk to me in a foreign language, you stupid ugly cow!" in reference to the elderly woman's Jamaican accent, before using a racial slur.
The Royal Air Force confirmed two jets tailed the flight.
The Vote Leave camp claims the ad violates referendum rules and the Bribery Act.
An online campaign demanding compensation has been launched.
Ryanair hit back over the sarcastic video, which has attracted over 577,000 views.