I am trying to figure out how one can lock in airfares for extensive amounts of time for groups. My school group here at college is looking to go to Italy for spring break on a photography assignment. We are looking at flying to Naples and flying out of Milan. Now here is the problem. We are just putting out information to tell people how much it would cost before they sign up, now I know there must be a way that people lock in airfares as many groups i have seen publish this information and even the iten when handing out information regarding trips. But how would one go about this? Any travel agents on here know how or anyone for that matter know how this is done?