法鲁
On the morning of 18 April KLM successfully carried out a test flight from Amsterdam to Düsseldorf with no problems. Afterwards, seven KLM planes with no passengers returned from Düsseldorf to Amsterdam. Air France also performed a test flight from Paris to Toulouse. In the evening of 18 April German airspace was partially re-opened for a period of 3 hours allowing a plane of stranded holidaymakers from Faro, Portugal to land at Hanover.