World Flight Planner is a website that allows commercial and private pilots to plan flights. This presentation will describe how we used FOSS4G software to process: - Complex weather data (winds aloft, temperatures) (postgis/postgres) - Parse and plot aeronautical information and real time pilot reports on a map. (geoserver, openlayers) - Show non-pilots the steps involved in pre-flight planning. Aeronautical data can be quite complex and traditional tools offered to pilots are purely text based. Tools like Geoserver and OpenLayers allow World Flight Planner to display this information in a visual format for safer flight planning. Elements from a previous presentation (http://tinyurl.com/badzvae) will be used.