Definition
An FAA traffic management program used to manage demand through airspace constrained by weather or capacity issues. The operator submits a list of acceptable reroute options for a flight, ranked by preference, and the FAA assigns one of those routes (or a delay) to balance traffic flow with available airspace.
Plain English
When a stretch of airspace is blocked or crowded, CTOP lets airlines tell the FAA which alternate routes they would accept, in order of preference. The FAA then picks one of those routes for each flight so that traffic keeps moving without overloading the airspace that is still open.
Context Anchor
Seen in ATC traffic management advisories, flight planning, and dispatch coordination during major weather, congestion, or airspace restrictions.
Derivation
Collaborative because the FAA and the operator work together — the operator supplies the route options, the FAA assigns one. Trajectory because each option is a full proposed flight path, not just a single fix. Options because more than one route is offered. Program because it is an ongoing FAA traffic management procedure.
Why Pilots Care
Gives operators direct input on route selection, which can reduce fuel use, arrival delays, and last-minute vectoring.
Grounding Statement
A CTOP is used to space and route flights before they overload a constrained part of the airspace system.
Intuition Check
CTOP does not mean pilots casually negotiate routes with ATC in real time. It is a structured FAA traffic management program that uses submitted route choices and assigned delays to manage demand.
Example Sentence 1
Dispatch advised that our flight had been placed in a CTOP and assigned the second-choice reroute around the line of thunderstorms over the Midwest.
Example Sentence 2
CTOP options allowed the flight to depart on time instead of waiting for a ground stop to lift.