While most airports in Northern Europe are now open, two Nordic countries have closed some of their airports because of a new cloud of ash from a volcano in Iceland. Norway has maintained flight restrictions on six airports from Stavanger in the south to Floro in the the north. Most of the oil rigs off Norway are still not receiving helicopter flights. The second largest airport in Sweden at Gothenburg is closed, together with a handful of airports in smaller, western cities. The main airport for Stockholm, Arlanda, is operating near normally, as is Malmo airport. Air freight is only a small proportion of all exports to and imports from the Nordic countries.