On 27 March 1977, a bomb explosion at the Gran Canaria Airport forced the KLM Flight 4805 & Pan Am Flight 1736 to change course and head for the Los Rodeos Airport (which is now the Tenerife North Airport), in what would turn out to be one of the worst days for the aviation industry. The dense fog and lack of any type of ground radar at the very small airport together with a series of miscommunications resulted in the collision of these 2 Boeing 747 passenger aircraft
on the runway. To date, this is the deadliest accident in the history of commercial aviation. All the 248 passengers and the crew aboard the KLM flight died and so did 335 of the 396 passengers aboard the Pan AM flight. The total death toll was 583 people, comprising of passengers and crew.
Japan Airlines Flight 123.
On 12 August 1985, Japan Airlines Flight 123 took off from Tokyo and was headed for Osaka, when a mechanical failure that involved the rear pressure bulkhead of the plane sent this Boeing 747SR soaring into Mount Takamagahara’s ridges. All 15 crew members & 505 of the 509 onboard passengers perished. This was the most catastrophic single-aircraft accident in commercial aviation history and the total death toll was 520.
The Mid-air collision at Charkhi Dadri
The deadliest mid-air collision in the world occurred on 12 November 1996, over the Charkhi Dadri village, which is to the west of the capital city of New Delhi. Flight 763 of Saudi Arabian Airlines had just departed from New Delhi and Flight 1907 of Kazakhstan Airlines was landing when they crashed, and all 349 people on both these flights were killed.