The 2025 Danish and Norwegian drone incidents were a series of unexplained unmanned aircraft observations reported between 22 and 28 September 2025 over Danish and Norwegian civilian airports and military installations. All incidents took place in the evening or at night, and a possibly connected incident took place in Norway on 22 September.
The first major incident forced a near four-hour suspension of flights at Copenhagen Airport (CPH) on the evening of 22 September after two to three large drones were repeatedly seen inside controlled airspace; Oslo Gardermoen (OSL) in neighbouring Norway also briefly closed its airspace that night following a separate sighting. Danish authorities characterized the activity as a likely hybrid operation intended to unsettle the public and disrupt critical infrastructure. Prime Minister Mette Frederiksen called the events “the most serious attack on Danish critical infrastructure to date.”[5][6]
In the following days, Aalborg Airport (AAL), which also hosts a military air base, was twice affected (24–25 and 25–26 September), and police received additional reports near Esbjerg and Sønderborg airports and at Flyvestation Skrydstrup, the main base of Danish F-16 and F-35 jets.
Read more here: https://en.wikipedia.org/wiki/2025_Danish_and_Norwegian_drone_incidents