Flight delays and cancellations were expected to continue into Wednesday at UK airports after another air traffic control failure kept planes grounded for hours, affecting hundreds of thousands of passengers.At least 177 flights scheduled for Wednesday to and from UK airports had been cancelled, plane tracking site Flightradar24 said, “nearly all at London Heathrow”. More than 1,000 were cancelled by about 8pm on Tuesday.Dublin Airport said airlines are operating a full schedule of flights on Wednesday following a “challenging day” on Tuesday, with around 90 flights to and from Dublin being cancelled.“Airlines worked throughout the night to reposition their aircraft, ensuring our busy first wave of flights was able to get underway as normal,” it said. “Dublin Airport remained open overnight to accommodate and assist the many passengers who had been left stranded in Dublin as a result of yesterday’s disruption.”The airport said the “significant upheaval” on Tuesday means the possibility of some disruption across the wider flight network in Europe remains on Wednesday. “Passengers, as always, should keep in contact with their airline directly to get the latest updates on the status of their flight,” it added.The “technical issue” at the air traffic control services provider Nats caused Britain’s third major stoppage in just over three years. The breakdown started at about 1pm on Tuesday and affected departing flights at many of Britain’s biggest airports including Heathrow, Gatwick, Manchester and Stansted. We’re pleased to report that airlines are operating a full schedule of flights at Dublin Airport today (Wednesday). This follows a challenging day yesterday, when air traffic control issues in the UK resulted in around 90 flights to and from Dublin being cancelled.Airlines… pic.twitter.com/xdWNOliCFl— Dublin Airport (@DublinAirport) September 9, 2026