A drunk passenger punched a flight attendant during a Delta flight from Japan to Honolulu, a court document stated.
Kenji Okamoto pleaded guilty to interfering with the duties of a flight attendant by assaulting and intimidating him, The Huffington Post reports.
Okamoto was flying first-class from Osaka on his honeymoon. Cabin crew noticed he was drunk before take-off and continued to drink throughout the flight.
According to AP, he got upset when one of the flight attendants would not take his meal tray away. He said his hands were full and Okamoto allegedly "threw a roundhouse type punch" at a flight attendant who intervened.
Cabin crew told authorities that Okamoto apologised while crying and remained calm for the rest of the flight, eventually falling asleep.
In an interview with authorities, he said he was "drinking heavily because he was celebrating his honeymoon with his wife ... that he married on April 20, 2014."
Okamoto was banned from flying with Delta and faces a maximum sentence of 20 years in prison when sentenced on 22 September. He was arrested at the airport and missed his honeymoon at a luxury resort in Honolulu.
Easyjet flight forced to divert to remove 7 unruly football fans
Video: Drunk woman handcuffed and flight diverted after she 'makes sexual advances'