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ABC NewsLiveVideoShowsShopInterest Successfully AddedWe'll notify you here with news aboutTurn on desktop notifications for breaking stories about interest? OffOnStream onAirport cyberattack disrupts more flights across EuropeFallout from a cyberattack that affected check-in systems at several European airports has extended into a second full dayByThe Associated PressSeptember 21, 2025, 7:06 AM1:07Check-in counters at a terminal at Berlin's Brandenburg airport, in Schönefeld, Germany, Saturday Sept. 20, 2025, after a cyberattack targeting check-in and boarding systems disrupted air traffic at several major European airports. (Carsten Koall/dpa via AP)The Associated PressBRUSSELS -- Fallout from a cyberattack that disrupted check-in systems at several European airports extended into a second full day on Sunday, as passengers faced dozens of canceled and delayed flights — and the impact poised to worsen for at least one major airport. Brussels Airport, seemingly the hardest hit, said it asked airlines to cancel nearly 140 departing flights scheduled for Monday because a U.S.-based software system provider “is not yet able to deliver a new secure version of the check-in system.” The airport said 25 outbound flights were canceled on Saturday and 50 on Sunday.Starting late Friday, airports in Berlin, Brussels and London were hit by disruptions to electronic systems that snarled up check-in and sent airline staffers trying options like handwriting boarding passes or using backup laptops. Many other European airports were unaffected.The cyberattack affected software of Collins Aerospace, whose systems help passengers check in, print boarding passes and bag tags, and dispatch their luggage. The U.S.-based company on Saturday cited a “cyber-related disruption” to its software at "select” airports in Europe.It was not immediately clear who might be behind the cyberattack, but experts said it could turn out to be hackers, criminal organizations or state actors.The European Commission, the executive branch of the 27-nation European Union, said that aviation safety and air traffic control were unaffected. There was currently no indication of a widespread or severe attack, while the origin of the incident remained under investigation, it added.While departure boards for London's Heathrow and Berlin's Brandenburg airports were showing signs of smoother arrivals and departures on Sunday, Brussels Airport was still facing considerable issues. Brussels Airport said in an email Sunday that it had asked airlines to cancel half of the 276 scheduled departing flights on Monday, “because Collins Aerospace is not yet able to deliver a new secure version of the check-in system.” Cancellations and delays will continue as long as manual check-in is necessary, it said.RTX Corp., the parent company of Collins Aerospace, did not immediately respond to two emails Sunday seeking comment. Popular ReadsCharlie Kirk leaves behind wife, 2 kids: What to know3 hours agoTrump admin updates: Trump at Charlie Kirk memorial serviceSep 21, 4:09 PMVideo shows Charlie Kirk shooting suspect jump down from roof, make getawaySep 11, 10:33 PMOn Saturday, the aviation and defense technology company said in a statement that it was working to resolve the issue: “The impact is limited to electronic customer check-in and baggage drop and can be mitigated with manual check-in operations.” Brussels Airport said it nonetheless was able to maintain 85% of scheduled departures over the weekend thanks to the deployment of extra staff by airport partners “and the fact that self bag drop and online check-in are still operational.”The cyberattack affected only computer systems at check-in desks, not self-service kiosks, airport spokesperson Ihsane Chioua Lekhli said, and teams were turning to alternative backup systems and pulling out laptop computers to help cope with the impact. The airports advised passengers to check the status of their flights before traveling to the airports, and using alternative check-in methods.“Work continues to resolve and recover from Friday’s outage of a Collins Aerospace airline system that impacted check-in,” a Heathrow statement said. “We apologize to those who have faced delays, but by working together with airlines, the vast majority of flights have continued to operate.”A rolling message Sunday on the Brandenburg Airport's web page said: “Due to a systems outage at a service provider, there are longer waiting times. Please use online check-in, self-service check-in and the fast bag drop service.”Related TopicsCyber SecurityTravelAirlinesSponsored Content by TaboolaPopular ReadsCharlie Kirk leaves behind wife, 2 kids: What to know3 hours agoVideo shows Charlie Kirk shooting suspect jump down from roof, make getawaySep 11, 10:33 PMTrump admin updates: Trump at Charlie Kirk memorial serviceSep 21, 4:09 PMWhat officials found at site where Travis Decker's suspected remains were locatedSep 19, 8:25 PMABC News Live24/7 coverage of breaking news and live eventsABC News NetworkPrivacy PolicyYour US State Privacy RightsChildren's Online Privacy PolicyInterest-Based AdsAbout Nielsen MeasurementTerms of UseDo Not Sell or Share My Personal InformationContact Us © 2025 ABC News

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Airport cyberattack disrupts more flights across EuropeFallout from a cyberattack that affected check-in systems at several European airports has extended into a second full dayByThe Associated PressSeptember 21, 2025, 7:06 AM1:07Check-in counters at a terminal at Berlin's Brandenburg airport, in Schönefeld, Germany, Saturday Sept. 20, 2025, after a cyberattack targeting check-in and boarding systems disrupted air traffic at several major European airports. (Carsten Koall/dpa via AP)The Associated PressBRUSSELS -- Fallout from a cyberattack that disrupted check-in systems at several European airports extended into a second full day on Sunday, as passengers faced dozens of canceled and delayed flights — and the impact poised to worsen for at least one major airport. Brussels Airport, seemingly the hardest hit, said it asked airlines to cancel nearly 140 departing flights scheduled for Monday because a U.S.-based software system provider “is not yet able to deliver a new secure version of the check-in system.” The airport said 25 outbound flights were canceled on Saturday and 50 on Sunday.Starting late Friday, airports in Berlin, Brussels and London were hit by disruptions to electronic systems that snarled up check-in and sent airline staffers trying options like handwriting boarding passes or using backup laptops. Many other European airports were unaffected.The cyberattack affected software of Collins Aerospace, whose systems help passengers check in, print boarding passes and bag tags, and dispatch their luggage. The U.S.-based company on Saturday cited a “cyber-related disruption” to its software at "select” airports in Europe.It was not immediately clear who might be behind the cyberattack, but experts said it could turn out to be hackers, criminal organizations or state actors.The European Commission, the executive branch of the 27-nation European Union, said that aviation safety and air traffic control were unaffected. There was currently no indication of a widespread or severe attack, while the origin of the incident remained under investigation, it added.While departure boards for London's Heathrow and Berlin's Brandenburg airports were showing signs of smoother arrivals and departures on Sunday, Brussels Airport was still facing considerable issues. Brussels Airport said in an email Sunday that it had asked airlines to cancel half of the 276 scheduled departing flights on Monday, “because Collins Aerospace is not yet able to deliver a new secure version of the check-in system.” Cancellations and delays will continue as long as manual check-in is necessary, it said.RTX Corp., the parent company of Collins Aerospace, did not immediately respond to two emails Sunday seeking comment. Popular ReadsCharlie Kirk leaves behind wife, 2 kids: What to know3 hours agoTrump admin updates: Trump at Charlie Kirk memorial serviceSep 21, 4:09 PMVideo shows Charlie Kirk shooting suspect jump down from roof, make getawaySep 11, 10:33 PMOn Saturday, the aviation and defense technology company said in a statement that it was working to resolve the issue: “The impact is limited to electronic customer check-in and baggage drop and can be mitigated with manual check-in operations.” Brussels Airport said it nonetheless was able to maintain 85% of scheduled departures over the weekend thanks to the deployment of extra staff by airport partners “and the fact that self bag drop and online check-in are still operational.”The cyberattack affected only computer systems at check-in desks, not self-service kiosks, airport spokesperson Ihsane Chioua Lekhli said, and teams were turning to alternative backup systems and pulling out laptop computers to help cope with the impact. The airports advised passengers to check the status of their flights before traveling to the airports, and using alternative check-in methods.“Work continues to resolve and recover from Friday’s outage of a Collins Aerospace airline system that impacted check-in,” a Heathrow statement said. “We apologize to those who have faced delays, but by working together with airlines, the vast majority of flights have continued to operate.”A rolling message Sunday on the Brandenburg Airport's web page said: “Due to a systems outage at a service provider, there are longer waiting times. Please use online check-in, self-service check-in and the fast bag drop service.”Related TopicsCyber SecurityTravelAirlinesSponsored Content by TaboolaPopular ReadsCharlie Kirk leaves behind wife, 2 kids: What to know3 hours agoVideo shows Charlie Kirk shooting suspect jump down from roof, make getawaySep 11, 10:33 PMTrump admin updates: Trump at Charlie Kirk memorial serviceSep 21, 4:09 PMWhat officials found at site where Travis Decker's suspected remains were locatedSep 19, 8:25 PMABC News Live24/7 coverage of breaking news and live events

Airport cyberattack disrupts more flights across EuropeFallout from a cyberattack that affected check-in systems at several European airports has extended into a second full day

Fallout from a cyberattack that affected check-in systems at several European airports has extended into a second full day

1:07Check-in counters at a terminal at Berlin's Brandenburg airport, in Schönefeld, Germany, Saturday Sept. 20, 2025, after a cyberattack targeting check-in and boarding systems disrupted air traffic at several major European airports. (Carsten Koall/dpa via AP)The Associated Press

Check-in counters at a terminal at Berlin's Brandenburg airport, in Schönefeld, Germany, Saturday Sept. 20, 2025, after a cyberattack targeting check-in and boarding systems disrupted air traffic at several major European airports. (Carsten Koall/dpa via AP)The Associated Press

BRUSSELS -- Fallout from a cyberattack that disrupted check-in systems at several European airports extended into a second full day on Sunday, as passengers faced dozens of canceled and delayed flights — and the impact poised to worsen for at least one major airport. Brussels Airport, seemingly the hardest hit, said it asked airlines to cancel nearly 140 departing flights scheduled for Monday because a U.S.-based software system provider “is not yet able to deliver a new secure version of the check-in system.” The airport said 25 outbound flights were canceled on Saturday and 50 on Sunday.Starting late Friday, airports in Berlin, Brussels and London were hit by disruptions to electronic systems that snarled up check-in and sent airline staffers trying options like handwriting boarding passes or using backup laptops. Many other European airports were unaffected.The cyberattack affected software of Collins Aerospace, whose systems help passengers check in, print boarding passes and bag tags, and dispatch their luggage. The U.S.-based company on Saturday cited a “cyber-related disruption” to its software at "select” airports in Europe.It was not immediately clear who might be behind the cyberattack, but experts said it could turn out to be hackers, criminal organizations or state actors.The European Commission, the executive branch of the 27-nation European Union, said that aviation safety and air traffic control were unaffected. There was currently no indication of a widespread or severe attack, while the origin of the incident remained under investigation, it added.While departure boards for London's Heathrow and Berlin's Brandenburg airports were showing signs of smoother arrivals and departures on Sunday, Brussels Airport was still facing considerable issues. Brussels Airport said in an email Sunday that it had asked airlines to cancel half of the 276 scheduled departing flights on Monday, “because Collins Aerospace is not yet able to deliver a new secure version of the check-in system.” Cancellations and delays will continue as long as manual check-in is necessary, it said.RTX Corp., the parent company of Collins Aerospace, did not immediately respond to two emails Sunday seeking comment. Popular ReadsCharlie Kirk leaves behind wife, 2 kids: What to know3 hours agoTrump admin updates: Trump at Charlie Kirk memorial serviceSep 21, 4:09 PMVideo shows Charlie Kirk shooting suspect jump down from roof, make getawaySep 11, 10:33 PMOn Saturday, the aviation and defense technology company said in a statement that it was working to resolve the issue: “The impact is limited to electronic customer check-in and baggage drop and can be mitigated with manual check-in operations.” Brussels Airport said it nonetheless was able to maintain 85% of scheduled departures over the weekend thanks to the deployment of extra staff by airport partners “and the fact that self bag drop and online check-in are still operational.”The cyberattack affected only computer systems at check-in desks, not self-service kiosks, airport spokesperson Ihsane Chioua Lekhli said, and teams were turning to alternative backup systems and pulling out laptop computers to help cope with the impact. The airports advised passengers to check the status of their flights before traveling to the airports, and using alternative check-in methods.“Work continues to resolve and recover from Friday’s outage of a Collins Aerospace airline system that impacted check-in,” a Heathrow statement said. “We apologize to those who have faced delays, but by working together with airlines, the vast majority of flights have continued to operate.”A rolling message Sunday on the Brandenburg Airport's web page said: “Due to a systems outage at a service provider, there are longer waiting times. Please use online check-in, self-service check-in and the fast bag drop service.”

Brussels Airport, seemingly the hardest hit, said it asked airlines to cancel nearly 140 departing flights scheduled for Monday because a U.S.-based software system provider “is not yet able to deliver a new secure version of the check-in system.” The airport said 25 outbound flights were canceled on Saturday and 50 on Sunday.

Starting late Friday, airports in Berlin, Brussels and London were hit by disruptions to electronic systems that snarled up check-in and sent airline staffers trying options like handwriting boarding passes or using backup laptops. Many other European airports were unaffected.

The cyberattack affected software of Collins Aerospace, whose systems help passengers check in, print boarding passes and bag tags, and dispatch their luggage. The U.S.-based company on Saturday cited a “cyber-related disruption” to its software at "select” airports in Europe.

It was not immediately clear who might be behind the cyberattack, but experts said it could turn out to be hackers, criminal organizations or state actors.

The European Commission, the executive branch of the 27-nation European Union, said that aviation safety and air traffic control were unaffected. There was currently no indication of a widespread or severe attack, while the origin of the incident remained under investigation, it added.

While departure boards for London's Heathrow and Berlin's Brandenburg airports were showing signs of smoother arrivals and departures on Sunday, Brussels Airport was still facing considerable issues.

Brussels Airport said in an email Sunday that it had asked airlines to cancel half of the 276 scheduled departing flights on Monday, “because Collins Aerospace is not yet able to deliver a new secure version of the check-in system.” Cancellations and delays will continue as long as manual check-in is necessary, it said.

RTX Corp., the parent company of Collins Aerospace, did not immediately respond to two emails Sunday seeking comment.

Popular ReadsCharlie Kirk leaves behind wife, 2 kids: What to know3 hours agoTrump admin updates: Trump at Charlie Kirk memorial serviceSep 21, 4:09 PMVideo shows Charlie Kirk shooting suspect jump down from roof, make getawaySep 11, 10:33 PM

Charlie Kirk leaves behind wife, 2 kids: What to know3 hours ago

Charlie Kirk leaves behind wife, 2 kids: What to know

Trump admin updates: Trump at Charlie Kirk memorial serviceSep 21, 4:09 PM

Trump admin updates: Trump at Charlie Kirk memorial service

Video shows Charlie Kirk shooting suspect jump down from roof, make getawaySep 11, 10:33 PM

Video shows Charlie Kirk shooting suspect jump down from roof, make getaway

On Saturday, the aviation and defense technology company said in a statement that it was working to resolve the issue: “The impact is limited to electronic customer check-in and baggage drop and can be mitigated with manual check-in operations.”

Brussels Airport said it nonetheless was able to maintain 85% of scheduled departures over the weekend thanks to the deployment of extra staff by airport partners “and the fact that self bag drop and online check-in are still operational.”

The cyberattack affected only computer systems at check-in desks, not self-service kiosks, airport spokesperson Ihsane Chioua Lekhli said, and teams were turning to alternative backup systems and pulling out laptop computers to help cope with the impact.

The airports advised passengers to check the status of their flights before traveling to the airports, and using alternative check-in methods.

“Work continues to resolve and recover from Friday’s outage of a Collins Aerospace airline system that impacted check-in,” a Heathrow statement said. “We apologize to those who have faced delays, but by working together with airlines, the vast majority of flights have continued to operate.”

A rolling message Sunday on the Brandenburg Airport's web page said: “Due to a systems outage at a service provider, there are longer waiting times. Please use online check-in, self-service check-in and the fast bag drop service.”

Popular ReadsCharlie Kirk leaves behind wife, 2 kids: What to know3 hours agoVideo shows Charlie Kirk shooting suspect jump down from roof, make getawaySep 11, 10:33 PMTrump admin updates: Trump at Charlie Kirk memorial serviceSep 21, 4:09 PMWhat officials found at site where Travis Decker's suspected remains were locatedSep 19, 8:25 PMABC News Live24/7 coverage of breaking news and live events

Charlie Kirk leaves behind wife, 2 kids: What to know3 hours ago

Charlie Kirk leaves behind wife, 2 kids: What to know

Video shows Charlie Kirk shooting suspect jump down from roof, make getawaySep 11, 10:33 PM

Video shows Charlie Kirk shooting suspect jump down from roof, make getaway

Trump admin updates: Trump at Charlie Kirk memorial serviceSep 21, 4:09 PM

Trump admin updates: Trump at Charlie Kirk memorial service

What officials found at site where Travis Decker's suspected remains were locatedSep 19, 8:25 PM

What officials found at site where Travis Decker's suspected remains were located

ABC News Live24/7 coverage of breaking news and live events