Unhinged United Airlines passenger bites chunk out of flight attendant's uniform during crazed mid-air meltdown from Miami to Newark

A passenger bit a chunk of fabric out of a flight attendant's shirt and told an 'old lady' she should 'go back to Russia' during a mid-fight meltdown.

The woman was on United Airlines Flight 762 from Miami to Newark but barely made it off the runway on Tuesday night before she became unruly.

Video recorded by another traveler began after the crew restrained her wrists with zip-ties and she was wrestling with three of them.

Suddenly she bit one of their shoulders, tearing off a piece of fabric and letting it float to the floor in front of the shocked plane.

'Stop touching me... let go of me, I'm a f**king girl, are you trying to kill me?' she shouted afterwards.

The video cuts to the woman, now with her hands zip-tied behind her back and standing in the aisle, yelling at everyone not to fly United.

'These people have an attitude problem and they don't f**king do their jobs. They're handcuffing me. Why are you handcuffing me?' she yelled.

'Why b***h? Why the f**k are you handcuffing me? Why, why, why?'

A passenger told her to stop yelling and she told her 'go back to Russia, old lady', then let out a steady stream of expletives and told her 'I'll f**king kill you, b***h'.

Audio from the plane caught the woman yelling: 'You're a disgrace, piece of s**t, I wish I could f**king spit on you right now.'

'Don't do that, don't do that,' a male flight attendant warned her. 'You are insulting everyone on this aircraft.'

Everyone on the plane clapped when she was kicked off after the flight diverted to Orlando and was delayed three-and-a-half hours. 

Witnesses said she threw punches and spat at people before she was restrained, according to TMZ.

More videos from after the plane landed in Orlando showed the woman being marched out of the airport by police.

'The plane is here in Orlando and the crew is not going to continue on [to Newark] because of what happened between here and Miami,' staff announced.

United said the passenger 'became aggressive and disruptive', causing the diversion to Orlando and lengthy delay.

'Our flight attendants worked to de-escalate the situation and protect other customers and after landing in Orlando, law enforcement met the flight, and the passenger was removed,' it said.

'We're grateful to our team for their professionalism and for looking out for the safety of our customers and their fellow United employees.'

The Orlando Police Department said the woman was taken to hospital for a medical evaluation and no arrest has yet been made.

The woman's identity and what sparked her meltdown are not yet known.