A method for providing cost data for a flight is provided. The method (i) obtains cost target data for the flight, under anticipated conditions; (ii) obtains real-time aircraft performance parameters affecting the actual cost of the flight, using continuous monitoring during the flight, including at least aircraft speed modes, aircraft flight level changes, tactical interventions, weather impact, and descent timing deviations; (iii) determines an actual cost of the flight, based on the real-time aircraft performance parameters affecting the actual cost; (iv) identifies flight plan change options associated with a potential cost savings over the actual cost, wherein the flight plan change options comprise potential modifications to the flight plan to complete the flight; (v) presents the flight plan change options; and (vi) adapts operation of one or more avionics systems onboard the aircraft, based on one of the flight plan change options.