Defense Forces Intensify After Mystery Drone Alert Grounds Flights At Major International Airport

Published May 15, 2026, 7:43 AM EDT A graduate in German, Jake has a passion for history and regional aviation, and enjoys sampling new carriers and aircraft. He has visited OEM facilities as far and wide as Bristol, Toulouse, and Seattle, and recently enjoyed the milestone of flying his 150th sector as a passenger. Based in Norfolk, UK. Earlier this morning, operations at Helsinki Vantaa Airport (HEL) in the south of Finland were brought to a temporary standstill after an emergency drone warning prompted an airspace closure in the region. The incident prompted the Air Force to scramble F/A-18 fighter jets as it looked to deter the threat. While the airspace closure only lasted for three hours, with operations resuming shortly after the reopening, it had considerable knock-on effects on an operational level. This is because the early morning period serves as a prime time for long-haul arrivals from Asia operated by Finnish flag carrier and oneworld member Finnair, whose main hub is located at Helsinki Airport. Let's take a closer look at how exactly this morning's events played out. Residual Delays Credit: Shutterstock According to reporting on the matter by AeroTime, Finnish authorities first issued the emergency drone warning for the Uusimaa region at 3:49 AM local time today. Given the use of military drones in the ongoing conflict between Russia and Ukraine, and Finland's close proximity to the former nation, the fact that "possibly more than one drone" might have entered and stayed in Finnish airspace could potentially represent a serious threat. As a result of this warning, a three-hour airspace closure affecting the region was put in place from 4:00 AM to 7:00 AM local time. After it was lifted following the conclusion that no "direct military threat" had been posed, operations at Helsinki Airport resumed at 7:19 AM local time. According to Flight Aware, three departures and four arrivals have been canceled in Helsinki today, with 23 departures and 31 arrivals being delayed. Finavia said: "Although flights are operating again, the disruption will cause delays and cancellations on Friday, May 15. Morning delays may also affect departing and arriving flights later in the afternoon." Multiple Diversions Several hours later, the knock-on effects of this operational disruption are still being felt at Helsinki Airport. Flightradar24 grades airport disruption on a scale of zero to five, and, at the time of writing, while departing flights only had a delay index of 1.0, arriving traffic was rated at 2.8. There were also several diversions. For instance, two separate inbound Airbus A350-900-operated Finnair flights from Tokyo ended up landing elsewhere. This was due to their originally planned arrival time being in the middle of the airspace closure window. As seen above, AY62 from Tokyo Haneda (HND) was due to land at 4:40 AM local time, but had to divert to Stockholm (ARN), and only reached Helsinki at 8:10 AM. AY74 from Tokyo Narita (NRT), meanwhile, went to Rovaniemi (RVN). A social media post made by Flightradar24 would later confirm that nine inbound flights were diverted. On the long-haul side, in addition to the two noted Tokyo flights, a Finnair service from Seoul (ICN) and a Sichuan Airlines flight from Chengdu (TFU) ended up in Tallinn, while Finnair also diverted its Hong Kong (HKG) and Singapore (SIN) flights to Stockholm and an Osaka service to Rovaniemi. On the short-haul side, Tallinn also handled a Sunclass Airlines flight from Chania (CHQ), while Stockholm saw a Finnair flight from Malaga (AGP). Related Finland's Busiest Airport Credit: Shutterstock Given that it serves the capital city of the Nordic country, and is the only commercial facility to do so, it doesn't come as too much of a surprise to see that Helsinki Vantaa, which also serves as the main hub of Finnish flag carrier and oneworld member Finnair, is by far the busiest airport in Finland. In 2025, the facility handled close to 17 million passengers, while second-placed Rovaniemi only just cleared the one million mark. According to present scheduling data made available by Cirium, an aviation analytics company, a grand total of 6,477 commercial passenger flights are scheduled to depart from Helsinki Vantaa Airport this May. Collectively speaking, these services will offer 1,015,893 seats. Finnair is the dominant operator, accounting for 5,039 flights (77.8%) and 757,133 seats (74.5%), while other big hitters include Norwegian, SAS, Ryanair, and Lufthansa.