An aircraft separation system for receiving tracking data for a plurality of aircraft from a tracking system, determining at least some of the plurality of aircraft to include in a three-dimensional awareness zone, determining a first track pair in the awareness zone comprising a first aircraft and a second aircraft of the at least some of the plurality of aircraft, wherein the first aircraft is on a first heading and the second aircraft is on a second heading that is different from the first heading, determining a separation distance between the first aircraft and the second aircraft, and displaying, on a display of the aircraft separation system, a user interface comprising a representation of the first aircraft, a representation of the second aircraft, and an indication of the separation distance between the first aircraft and the second aircraft displayed proximate to the representation of the second aircraft.