Nationair operated a number of sub-contracts all over the world , including Nigeria Airways Flight 2120 for Nigeria Airways which crashed at Jeddah , Saudi Arabia on 11 July 1991 , killing all 261 on board , including 14 Canadian aircrew . It was and remains the worst aviation disaster involving a Canadian airline and a Douglas DC-8
Nigeria Airways Flight 2120
Nigeria Airways Flight 2120
Nolisair