The final straw for the 717 was when Air Canada replaced its aging DC-9 fleet with 15 CRJ200s, 30 CRJ700s, and 45 Embraer EMB ...
In December 2003, Boeing finally threw in the towel on the 717 after Air Canada, a long-time DC-9 customer, placed an order with Bombardier for 15 CRJ200s, 30 CRJ705s, and 45 Embraer EMB-190s.