What we do is scout out potential locations that have an appropriate amount of rooftop space for advertising at locations surrounding the airport. From there we reach out to these companies/business owners to inquire whether they would be interested in leasing their rooftop for a certain time period (1 year – 5 year contract options).
Once this is confirmed, we can ask our list of advertisers who might be interested in this location, and then finalize the rates, design, etc. We act as the go between for the owner of the roof/property and the advertising company.