Anyone caught up in the disruption should contact their airline, they added.
No further official information about the nature of the defect has been released.
A number of people spoke to the BBC on Friday evening about their experience at the airport – among them Paul Smith, who was due to fly to Glasgow for his son’s 20th birthday but had to cancel his trip.
“The communication, advice and support for passengers has been really poor,” he said.
There were no announcements on the tannoy system for over an hour, he said, which meant EasyJet reps in the departure lounge were the only source of information.
“What we’ve heard is that there’s a hole in the runway.”
Dave Blackwell, travelling home from Rhodes in Greece, said it had been “a shambles” since his flight back to Bristol was diverted to Newcastle.
“We were in Rhodes Airport for three hours with no information. Now we have all been told our flight is going to Newcastle and then a five or six hour bus ride – why Newcastle? How appalling,” he said.
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