There was a notable decline in the number of airport incidents between January and June 2009 compared to the same period of time in previous years.
This is according to figures from the UK Airprox Board (UKAB), which revealed a total of 60 incidents during the first six months of the year involving commercial, general aviation and military aircraft.
In each of the previous five years, the average number of incidents during the same time frame stood at 88.
Ian Dugmore, UKAB’s director, said the reduction is "particularly welcome" news.
"However, we need to acknowledge that the decline in commercial air transport and general aviation incidents may be partly due to traffic reduction during the recession," he explained.
Mr Dugmore went on to say that unauthorised incursions into controlled airspace can cause disruption and delay to passengers travelling on flights.
Earlier this month, the Civil Aviation Authority revealed that UK airports accommodated 17 million fewer passengers last year than the total recorded in 2008.