The world's first terrorist attack while in flight was Cubana Flight 455 on October 6,1976, when the airliner flying from Barbados to Jamaica was brought down by two time bombs, killing 73 people.
The world's first terrorist attack intending to indiscriminately kill civilians while in flight was Cubana Flight 455. It was a Cubana flight from Barbados to Jamaica that was brought down by a terrorist attack on October 6,1976, killing 73 people.