wrote in message ...
The airline computers *automatically" determine the route for long
segments
and use canned routes for short segments. Such flight plans are then
transferred to the FAA without any human action on the part of dispatch or
the flight crew (unless they want to change something).

Once such an air carrier flight plan is in the hands of the FAA, it is
processed no differently than a flight plan originated by a FSS specialist
or via DUATs.

That's exactly how it works. All airlines have a direct funnel for their
flight plans to get into the system.