The Aer Lingus threat comes after a seven planes were checked after bomb threats were made a day before.
An Aer Lingus flight from Dublin to Rome has had to be diverted to France after a bomb threat was made.
The news comes just a day since seven planes were diverted and checked for similar threats, including four Ryanair flights.
Other airlines affected included LOT Polish Airlines, SAS, and WizzAir, with two of the flights that day involving Rome's Fiumicino airport (known as Leonardo da Vinci International Airport).
There was no obvious pattern in the incidents, which saw flights travelling to and from a variety of locations including the UK, Ireland, Denmark, Portugal and Italy.
The affected aircrafts landed safely in Poland, Italy, Spain, and Bulgaria.
According to Flightradar 24's tracking service, the Aer Lingus plane appears to have landed safely at a French Military base in Evreux.
The flight tracking website also indicates that no flights have departed from the Italian airport in the past 30 minutes.
Of the searches carried out on the seven previous threats, there was no evidence of terrorist activity.
However, authorities noted that they were responding to an unusual number of reported threats in one day.
None of the incidents and subsequent searches threw up any evidence of terrorist activity, though authorities were responding to an unusual number of reported threats in one day.
More to follow...
Main image: Aer Lingus plane on ground at Dublin airport Pic: Alamy Stock Image