Avinor, the Norwegian aviation authority, is warning of significant flight delays and cancellations, particularly affecting western Norway. A large portion of the airspace over the West Coast will be closed this evening. Consequently, 72 flights have already been cancelled at Oslo Gardermoen Airport for Sunday. The disruptions are expected to impact travel plans for numerous passengers. Passengers are advised to check with their airlines for the latest updates on their flights. The reason for the airspace closure has not been detailed, but Avinor indicates widespread impacts. Travellers should anticipate potential rescheduling or cancellation of flights across the country.