Travel Technology - How to best start your own air fare booking search site?

After searching all over the internet, I couldn't find the code for air fare booking engine. Does anyone know where I can find the code for a search engine? At least a pay service that let you set up search engine on your site?

Given that very smart people do this for a living and charge for it (or derive ad revenue, at a minimum), I think it's highly unlikely you will roll to sourceforge and find code like this.