The invention provides, in one aspect, aviation navigational and/or flight management systems and methods that accommodate emergencies requiring provide real-time, built-in guidance to a nearest reachable airport. Related aspects of the invention provide such systems as respond to an operator alert, e.g., pressing of a button, by provide a graphical representation of the flight path to a nearest reachable airport. Further related aspects of the invention provide such systems as take geography into account in (i) identifying a nearest reachable airport, and (ii) determining a path to that airport. Still further related aspects of the invention provide such system as take characteristics of the host aircraft, weather and other externalities into account (i) identifying a nearest reachable airport, and (ii) determining a path to that airport. Other aspects of the invention provide systems as described above that, additionally, accommodate real-time radar vectoring operations and/or course deviation information from a predetermined flight plan between an origin location and a desired final destination.