An integrated aircraft flight control system comprising: an engine control system associated with an engine, said engine control system comprising a processor and a memory communicatively coupled to said processor, said engine control system configured to receive engine information from a plurality of sensors associated with the engine and to control a current operation of the engine using the received engine information and to generate engine performance and health information; a flight control system associated with the aircraft, said flight control system comprising a processor and a memory communicatively coupled to said processor, said flight control system configured to receive aircraft information from a plurality of aircraft sensors associated with the aircraft and flight planning information from offboard the aircraft and to generate flight information and trajectory intent information, the flight information and trajectory intent information including at least one of planned future flight conditions of the aircraft and predicted future flight conditions of the aircraft; and a communications channel communicatively coupled between said engine control system and said flight control system, wherein said engine control system is configured to transmit the generated engine performance and health information to said flight control system using the communications channel, wherein said flight control system is configured to transmit the generated flight information and trajectory intent information to said engine control system using the communications channel, wherein said engine control system is configured to modify the operation of the engine using the flight information and trajectory intent information generated by the flight control system, and wherein said flight control system is configured to modify the operation of the aircraft using the engine performance and health information generated by the engine control system; said flight control system is configured to predict or plan for a trajectory change and transmit such a change to said engine control system prior to the time the trajectory change will start, such that said engine control system can effect the change to the engine in enough time to permit engine control system to prepare the engine for the trajectory change. an engine control system associated with an engine, said engine control system comprising a processor and a memory communicatively coupled to said processor, said engine control system configured to receive engine information from a plurality of sensors associated with the engine and to control a current operation of the engine using the received engine information and to generate engine performance and health information; a flight control system associated with the aircraft, said flight control system comprising a processor and a memory communicatively coupled to said processor, said flight control system configured to receive aircraft information from a plurality of aircraft sensors associated with the aircraft and flight planning information from offboard the aircraft and to generate flight information and trajectory intent information, the flight information and trajectory intent information including at least one of planned future flight conditions of the aircraft and predicted future flight conditions of the aircraft; and a communications channel communicatively coupled between said engine control system and said flight control system, wherein said engine control system is configured to transmit the generated engine performance and health information to said flight control system using the communications channel, wherein said flight control system is configured to transmit the generated flight information and trajectory intent information to said engine control system using the communications channel, wherein said engine control system is configured to modify the operation of the engine using the flight information and trajectory intent information generated by the flight control system, and wherein said flight control system is configured to modify the operation of the aircraft using the engine performance and health information generated by the engine control system; said flight control system is configured to predict or plan for a trajectory change and transmit such a change to said engine control system prior to the time the trajectory change will start, such that said engine control system can effect the change to the engine in enough time to permit engine control system to prepare the engine for the trajectory change.