SEATTLE - Air Canada says it has exercised options and purchase rights to order 23 Boeing 787s.

At average list prices the order would be worth about $3.7 billion.

Air Canada now has 37 of the new mid-size widebody planes on order and says it's the largest North American customer for the new plane Boeing is rolling out this summer at the Everett factory.

The Montreal-based airline is taking options for 32 more of the planes, but reducing a previous order for Boeing 777s by two planes.

Air Canada says it will use the new 787s to replace Boeing 767s and Airbus planes in its fleet.