The threat "came to a police station in Dublin, and referred to some explosives aboard that specific flight," Pratt said. Aer Lingus said police received the call at about 0300 GMT.
No trace of explosives was found in the initial search, and all baggage was cleared for an onward flight to Dublin, said Gillian Culhane, an Aer Lingus spokeswoman in Dublin.
"It wasn't an emergency landing. It wasn't a red alert. The flight was coming here anyway," Pratt said. The aircraft was parked at a remote stand as a precaution, he said.
Passengers who were ticketed to go on to Dublin had all been cleared to continue their flight by 0945 GMT, said Culhane.
Pratt said security officials decided to remove all of the baggage from the flight to be screened again.
"The passengers that were booked on the flight to Dublin, they have been reaccommodated on another flight," Culhane said.
"The security authorities are still on board the aircraft, but the passengers have been interviewed, they have been reconciled with their baggage," Culhane said.