Norway ATC Strike to Close Oslo Airport for Five Hours Sunday

Oslo Airport will close to scheduled air traffic for five hours on Sunday, August 23, from 06:30 to 11:30 local time, as Norway's air traffic controller strike enters its third day. Airport operator Avinor said the closure would proceed if the walkout remained in effect and warned of major cancellations, delays, and nationwide knock-on disruption throughout the day.

The five-hour window contains 135 scheduled movements — 85 departures and 50 arrivals. As of 6:11 p.m. CEST Saturday, 89 of those movements had already been marked canceled: 68 departures and 21 arrivals, including 30 domestic and 59 international flights. Norwegian carried the largest exposure, with 42 of its 54 scheduled movements in the window canceled. SAS had 26 of 44 movements canceled. Additional cancellations affected flights operated by Widerøe, KLM, Lufthansa, Turkish Airlines, Air France, Finnair, and LOT Polish Airlines.

The closure falls on a day Avinor had forecast 95,521 passengers through Oslo Airport in a June traffic outlook. Avinor also forecast increasing delays at Bergen Airport Flesland on Saturday evening, followed by major capacity restrictions and periods of closed airspace over western Norway, with effects expected to ripple across Norway through Sunday and remain noticeable on Monday. The initial strike removed 12 controllers working at Gardermoen, its approach control unit, Bergen/Flesland, and the western Norway area control center; Avinor is matching air traffic capacity to available controllers, prioritizing search and rescue, ambulance, police, and operational military flights, followed by scheduled airline and offshore helicopter traffic. The union, Norsk Flygelederforening, says the dispute concerns working conditions and rest breaks, while employer body Spekter and Avinor say compensation was also part of the negotiations. The dispute remained unresolved Saturday afternoon, with no new mediation sessions scheduled and no contact between the two sides since talks broke down, though both indicated openness to renewed talks. The union has notified a further withdrawal beginning Tuesday, August 25, involving eight additional controllers, which Avinor says would directly affect Tromsø Airport and airspace over central and northern Norway.

This is a capacity-rationing event: with only 12 controllers available across Gardermoen, its approach unit, Bergen/Flesland, and the western area control center, Avinor is triaging traffic by priority tier rather than running a reduced version of the normal schedule, which is why cancellations concentrate heavily on the two largest scheduled carriers while search and rescue, ambulance, police, and military flights keep moving.

A closure at one major node does not stay local. Aircraft and crews displaced by canceled morning sectors at Oslo fall out of position for later services, which is why Avinor is already flagging effects rippling through Sunday and remaining noticeable on Monday, and why Bergen is seeing capacity restrictions before Oslo's closure window even opens.

The next test is whether the two sides restart talks before Tuesday, August 25, when a further withdrawal of eight controllers is set to extend disruption to Tromsø Airport and airspace over central and northern Norway. Until Norsk Flygelederforening and Spekter re-engage, the scope of affected airports and dates will keep growing rather than stabilizing.