The Only Way is Essex stars were spotted returning to the UK after their loved-up getaway in Marbella.
An onlooker claimed the couple were arguing as they walked towards a terminal at London's Southend Airport.
Argent was reportedly seen rushing ahead as Collins battled to grab his arm in confrontation.
Onlookers claim he continued to walk away and ignore his other half, until Collins stopped him altogether to have it out.
An eyewitness told The Sun: “Whatever had been said on that plane, it seems Arg wanted to put as much distance between himself and Gemma as possible.
“She wouldn’t let him just walk away and kept shouting at him to try and make him stop and talk to her.
“Everyone was staring at them, it was pretty awkward.”
But friends of the duo reportedly told the publication it was simply a "lovers tiff."
They said: "Gemma and Arg have a fiery relationship and always have done.
“They have tiffs all the time but they're madly in love really!”