The 'Plane Stupid' demonstration that took place on the 13th July led to multiple delays and the cancellation of 22 flights overall.
The activists who say they were protesting over the plans to expand Heathrow had cut a hole in the fence and chained themselves to the railings.
Supporters of the opposition of the third runway at Heathrow chanted outside the court "No ifs, no buts, no third runway!"
The activists were charged with aggravated trespass and entering a restricted area of the airport without permission.
They were bailed on the condition that they do not enter Heathrow or its perimeter.
A trial expected to begin on the 18th January 2016.
