A system and method may provide a real time alternative flight selection based on threat mitigation along a currently planned path at a specific time. The system and method may receive threat information associated with a specific path and compare the threat information to each leg of the path to determine if a threat may exist during that specific leg. Should a threat exist, the method may propose an alternate estimated time of departure (ETD) to mitigate the future threat. Should the alternate ETD be insufficient to mitigate the threat, the method may further propose an alternate lateral and vertical path at the original or modified ETD to successfully mitigate the threat.