Indirect Flight Effects

Theres perhaps some confusion among pilots about how a direct route gets handled and, potentially, mutated, as illustrated in one IFR-readers question: If you file direct, is your route planned by some poor guy at the local TRACON or a regional computer? To what extent does putting in a few fixes affect the route ATC gives you? Lets see if we can clear up that haziness.

Editorial Staff

Friday, January 08, 2016 at 12:00 AM ET

Verified

Key Takeaways:

ATC's primary role is to control air traffic flow and ensure safety, not to plan individual flight routes; pilots are responsible for their flight planning and must advise if an ATC instruction cannot be safely complied with.
While pilots may file direct, routes are often amended by ATC due to factors like established traffic flows, active special use airspace, or conflicting traffic, despite controllers generally preferring direct clearances for efficiency.
Route modifications are a collaborative process involving multiple human controllers across various facilities (clearance, tower, center, approach) and sophisticated computer systems that identify conflicts and manage traffic across different sectors.
For long-distance flights, it is recommended to file at least one fix within each ATC Center's airspace to help both computer systems and controllers effectively visualize and manage the flight path.

See a mistake? Contact us.

If there’s beauty in simplicity, then there are few things quite as pretty as a flight plan that’s filed, and cleared, direct from departure to destination, with nothing in between.

However, to paraphrase a 19th century German saying, “No plan survives first contact with implementation.” As many pilots out there find out on a daily basis, just because one files or requests direct, doesn’t mean one gets direct. Some days, you luck out. Others, a few ATC clearances can turn that sweet little route into a bloated monster.