High Level Air Route

A high-level air route is a designated route for aircraft operating in high-level airspace — above FL180 in Canada. High-level routes include jet airways and published RNAV routes used by commercial aircraft at cruise altitudes.

High-Level Airspace in Canada

Above FL180 in Canada, all aircraft operate under IFR in Class A airspace. High-level routes are depicted on IFR high-altitude en route charts. Aircraft operating in this airspace must have approved equipment, current charts/databases, and be IFR-approved.

Related Terms

See also: High Level Airspace, High Level Airway, Flight Level.