Business aviation flight activity has seen a welcome resurgence in recent weeks, with positive trends being most evident in areas where demand for trips has been bolstered by the Northern Hemisphere summer season, according to the latest Global Market Tracker produced by aviation data specialist WingX. Throughout July and into the first few days of August, activity levels were just 18 percent below where they had been during the same period of 2019, with more than 23,000 business aircraft operating some 500,000 flight hours.