Christine Drews Sieger
A wave of anonymous bomb threats disrupted dozens of European passenger flights this week before authorities confirmed every alert was a false alarm.
More than 30 passenger flights across Europe faced security alerts, mid-air diversions, and emergency inspections this week.
The wave of anonymous threats targeted major transport hubs including London, Brussels, Madrid, Milan, and Rome.
While security teams cleared every aircraft and confirmed all alerts were false alarms, the incidents triggered cascading flight delays and heavy logistical costs.
Budget airline Ryanair was among the hardest hit, reporting disruptions across eight separate flights, The Guardian reports.
When an alert arrives, aviation protocols leave no margin for hesitation. Airlines assess every warning against strict safety criteria, as Joji Waites, flight safety director at the British Airline Pilots’ Association (Balpa), explained:
“Usually if a plane is still on the Tarmac that will mean an evacuation, and if it is in the air the priority will be to land the plane as soon and as safely as possible.”
Once an aircraft is airborne, assessors have only two classifications: credible or non-credible.
Even a marginally plausible threat forces immediate intervention, which prompted military fighter jets to scramble and escort civilian airliners in countries such as Bulgaria, France, Hungary, and Italy.
Public flight data fuels credible hoaxes
Most warnings arrived via anonymous emails written in Italian and directed to airport authorities in Rome and Milan.
The messages cited exact flight numbers, carrier identities, and scheduled landing times for inbound routes from cities like Thessaloniki and Porto.
That technical precision explains why authorities took the warnings so seriously.
Decades ago, obtaining flight numbers, aircraft models, and real-time schedules required insider credentials.
Today, commercial tracking software and open databases make identical operational data available to anyone with an internet connection.
Anonymous senders can therefore assemble convincing alerts that automatically meet the criteria for emergency response.
While Czech police swiftly determined that four targeted arrivals into Prague held “low relevance,” authorities in Italy, Bulgaria, and Spain were legally obliged to conduct full-scale aircraft sweeps, according to The Guardian.
Investigators seek source behind disruption
European intelligence and law enforcement agencies are currently tracking the digital footprints of the emails, but have found no evidence linking the threats to foreign states like Russia or Iran, nor to any specific criminal network.
Addressing the wave of disruptions, EU Transport Commissioner Apostolos Tzitzikostas stated that it is “too early to draw conclusions on whether the reported incidents are linked,” while stressing that “any threats against civilians are unacceptable.”
For airlines and airports, the immediate operational concern is whether publicity surrounding the incidents will trigger copycat alerts and grounding more flights in the days ahead.
As we have previously reported about the case, it can also cost a carrier as much as $250,000 once emergency inspections, extra fuel, missed passenger connections, and crew replacements
