From Heathrow to Brussels, why European airports are struggling to recover from a cyberattack on Collins Aerospace

The weekend travel rush across Europe has been thrown into chaos after a cyberattack crippled check-in and boarding systems at multiple airports, leaving passengers stranded in long lines and forcing airlines to cancel or delay flights. The disruption, triggered by a systems failure at Collins Aerospace, a division of RTX, has exposed the vulnerability of the continent’s aviation backbone to third-party cyber risks. Officials have confirmed that the disruption is set to stretch into Sunday, with Brussels Airport already warning that nearly half of its scheduled departures could be scrapped to prevent further operational collapse.

How did a cyberattack on a third-party provider bring European airports to a standstill?

The disruption began when Collins Aerospace reported a “cyber-related” outage in its Multi-User System Environment, better known as MUSE. This critical software platform underpins electronic check-in, baggage drop and boarding functions used by airlines at dozens of airports across Europe. With these systems offline, airport operators were forced to fall back on manual processes such as handwritten boarding passes and baggage tags. While these methods kept some flights moving, they proved significantly slower and prone to errors, resulting in mounting delays.

Heathrow Airport in London, Berlin Brandenburg, Brussels Airport, Dublin Airport and Cork Airport were among the worst affected, though the scale of impact varied depending on whether airlines had backup arrangements in place. British Airways, for instance, was able to rely on alternative systems and therefore experienced less disruption compared with carriers that were fully dependent on Collins Aerospace’s platform.

Why Brussels Airport is emerging as the epicenter of the cyberattack disruption in Europe

Brussels Airport has taken perhaps the most drastic measures, announcing that as many as half of all departures scheduled for Sunday could be cancelled outright. Airport management said this pre-emptive move was necessary to avoid cascading knock-on effects, where one delayed flight would ripple into dozens of missed connections and logistical breakdowns across the network. By late Saturday, 29 flights had already been cancelled across European airports, with scores of others experiencing significant delays.

The decision in Brussels underscores how the interconnectedness of modern aviation can magnify the impact of a single point of failure. A cyberattack against a software vendor in one location can rapidly spread its effects across multiple hubs, forcing airports to adopt drastic measures.

What is known about the cyberattack on Collins Aerospace and what remains uncertain?

Collins Aerospace confirmed that its teams were working around the clock to restore MUSE functionality but refrained from disclosing technical details. Cybersecurity experts note that such reluctance is typical in the early stages of an incident investigation, particularly when there are concerns about attribution or data exfiltration. What is certain is that the outage is directly linked to a cyber-related event, not to routine system maintenance or hardware malfunction.

What remains unclear is who was behind the attack, what the motives were, and whether the assault was financially motivated ransomware, politically charged sabotage, or an opportunistic exploit by criminal groups. Officials have not attributed responsibility, and speculation about hacker groups or state-backed actors has not been substantiated. Also uncertain is the ultimate scope of the disruption—whether more airports will experience cascading failures and whether international hubs beyond Europe could be affected if airlines struggle with their integrated systems.

How are passengers and airlines coping with the widespread airport delays and cancellations?

For travelers, the disruption has translated into long queues, confusing boarding procedures, and repeated announcements of cancellations. Airlines have advised passengers to arrive much earlier than usual, with some urging four to five hours before departure to allow for manual processing. Airports with lower traffic volumes or those using alternative providers have managed better, but major hubs with heavy reliance on automated check-in services have been particularly hard hit.

Airlines have also been forced to make quick decisions about which flights to prioritize. In several cases, short-haul flights were cancelled to free up capacity for long-haul departures, where disruptions could have far more complex knock-on effects involving international connections. At the same time, some carriers have rebooked passengers onto partner airlines or alternative routes, but these solutions have been hampered by already full flights during the peak weekend travel period.

Why cybersecurity vulnerabilities in aviation supply chains are now drawing urgent attention

This cyberattack has highlighted how fragile the digital infrastructure supporting modern aviation can be. Airlines and airports increasingly depend on third-party technology vendors for mission-critical functions. While these partnerships improve efficiency, they also create systemic risks: when a single supplier experiences a breach, the disruption is multiplied across the industry.

Industry analysts note that Collins Aerospace is a high-value target precisely because of the scale of its client base. By providing shared systems to multiple airlines and airports, it centralizes risk. A successful breach of its software has an effect similar to a domino chain, toppling services across entire regions. Experts warn that unless the aviation industry demands stronger redundancy protocols, faster system recovery capabilities, and greater transparency from third-party vendors, such incidents will continue to threaten operational continuity.

What lessons might regulators and airlines take away from the European airport cyberattack?

Regulatory bodies are expected to push for tighter oversight of aviation technology providers in the wake of this incident. Governments across Europe have already been stepping up efforts to safeguard critical infrastructure against cyberattacks, but this latest disruption will likely accelerate those initiatives. Airlines and airports may be required to demonstrate not only their own cybersecurity preparedness but also the resilience of the vendors they depend on.

From a commercial perspective, airlines will need to reassess their contracts with software providers. Future service agreements may include stronger clauses around service-level guarantees, mandatory fallback systems, and penalties for prolonged outages. At the same time, airports are expected to increase investment in manual contingency planning, ensuring that backup procedures can be scaled quickly when digital systems fail.

How long will the disruption continue and what should travelers expect next?

As of Saturday night, officials acknowledged that the disruption would extend into Sunday. The recovery timeline will depend on how quickly Collins Aerospace can restore its systems or deploy workarounds. Brussels Airport has already taken the step of cancelling a large portion of Sunday’s schedule, but other airports may wait until early morning assessments before making final decisions.

Passengers planning to travel should expect check-in and baggage drop systems to remain unreliable, with longer wait times the norm. Airlines may continue to cancel short-haul routes to preserve long-haul capacity, and rebooking options will remain limited due to high seasonal demand. While some airports may see gradual normalization by Sunday evening, a full return to smooth operations is unlikely until at least Monday.

Why this cyberattack could reshape how the aviation sector approaches digital resilience

The immediate concern for travelers is the inconvenience of missed flights and long delays, but the broader implication for the aviation sector is strategic. This incident has served as a reminder that the weakest link in an airline’s operations may not be its aircraft or airport infrastructure but its dependence on digital platforms managed by third parties.

For investors, the disruption could influence institutional sentiment around aerospace and airline technology vendors. Questions about the cost of outages, potential regulatory fines, and reputational damage may weigh on corporate valuations in the short term. At the same time, cybersecurity providers and resilience consultants could see rising demand as the industry looks to fortify its defenses.

For policymakers, the attack highlights the urgency of treating aviation cybersecurity as part of national security. The possibility that such incidents could be repeated during peak travel seasons or expanded to other forms of critical infrastructure like rail or energy networks cannot be ignored.

What are the final takeaways from the European airport cyberattack for travelers, regulators, and the future of aviation resilience?

The cyberattack on Collins Aerospace and its cascading impact across European airports is more than a temporary travel disruption; it is a stress test for the aviation industry’s digital resilience. For passengers, the experience has been defined by frustration, cancellations, and the realization of how dependent air travel has become on unseen software platforms. For airlines and regulators, it has opened a conversation about systemic risk and the need to build redundancy into every layer of operations.

This episode will likely accelerate investment in cybersecurity, drive regulatory scrutiny of aviation vendors, and shift boardroom conversations about risk management. Whether the disruption ends on Sunday or stretches longer, its significance will linger far beyond the weekend queues in Brussels, Berlin or Heathrow.