Officers had to board flight EZY77 from London Luton to Glasgow on Sunday 30 August, following reports that someone would not comply with requests from easyJet flight attendants.
Police Scotland later confirmed that a man was issued with a 'recorded police warning' in connection with a 'disturbance' during the flight.
According to eyewitness Gisela Martinez, a woman on board had refused to wear a mask for the flight and was ignoring airline workers.
Her companion then became 'very aggressive' and confronted staff, also taking his own mask off.
"She was asked several times, but to no response.
"However the man she was with was aggressively arguing back - to the point where he took off his mask, stood up and confronted staff down the front of the plane.
"He was very aggressive in his attitude to the point that a few of us felt the flight might be turned back to Luton.
"However staff continued to remind him that this was part of the terms he had agreed to when purchasing his ticket and he sat down - unhappy, but compliant from then on."
Martinez said the incident left many passengers feeling alarmed, adding: "We were all kind of scared and confused by the situation."
An easyJet spokeswoman told LADbible: "EasyJet can confirm that police attended flight EZY77 from London Luton to Glasgow on Sunday 30 August due to a passenger behaving disruptively onboard and refusing to wear their face mask.
"In line with new guidelines, all passengers are currently required to bring their own face mask for their flight which must be worn during boarding and onboard.
"EasyJet's cabin crew are trained to assess and evaluate all situations and to act quickly and appropriately to ensure that the safety of the flight and other passengers is not compromised at any time.
"Whilst such incidents are rare, we take them very seriously, and do not tolerate abusive or threatening behaviour on board.
"The safety and wellbeing of customers and crew is our highest priority."
A Police Scotland spokeswoman said: "We can confirm that one man was issued with a recorded police warning in connection with a disturbance during the flight on an easyJet flight from London Luton to Glasgow on Sunday August 30."
Featured Image Credit: Gisela Martinez