Airlines recorded zero accident deaths in commercial passenger jets last year, according to a Dutch consulting firm and an aviation safety group that tracks crashes, making 2017 the safest year on record for commercial air travel.

Dutch aviation consulting firm To70 and the Aviation Safety Network both reported Monday there were no commercial passenger jet fatalities in 2017. "2017 was the safest year for aviation ever," said Adrian Young of To70.

To70 estimated that the fatal accident rate for large commercial passenger flights is 0.06 per million flights, or 1 fatal accident for every 16 million flights.