Coun Barton, of Mill View, said: “They seemed to come from the Ewloe area and float towards Shotton. There were about six of them and they appeared and then vanished for a while.
“They were bowl-shaped, orange blobs, with a glow of light around them.”
Coun Barton says the objects appeared to be flying higher than 1,500ft, which means they would have been breaking air traffic regulations.
The councillor is keeping an open mind on the origins of the UFOs.
He said: “If this has been a prank, it is very irresponsible, it could have caused a terrible aircraft accident.
“I thought these objects may have been created by a glider towing fireworks, but there was no smoke.
“It is very alarming to think what they could be.”
A spokesman for Air Traffic Control at Liverpool John Lennon Airport said: “Nothing out of the ordinary was seen at this time.”