Miami to São Paulo. The client wants to leave Thursday morning. They call on Monday afternoon. The broker has 72 hours to secure permits for entry into Brazilian airspace, coordinate with handling agents at Guarulhos, verify crew documentation, and confirm customs procedures.
72 hours sounds like enough time. It is not.
International charter requires overflight permits (permission to cross through another country's airspace) and landing permits (permission to land). Some countries process these in 24 hours. Brazil requires 72 hours minimum for landing permits. Argentina requires 5 business days. Russia requires 10.
The permit timeline starts when the application is submitted with complete documentation. Not when the broker makes the first call. Not when the client confirms the trip. When the paperwork is complete and in the hands of the relevant civil aviation authority.
A broker who accepts a 72-hour booking for an international trip without flagging permit timelines is skipping a step. They may get lucky—the permits may come through. Or the client may find out at 6 AM on Thursday that their departure has been pushed to Friday because Brazil has not yet approved the landing.
This is not an operator failure. This is a timing failure. And it is entirely preventable.
The client does not need to know how permits work. The client needs to know that their broker knows how permits work. The difference shows up in whether the broker asks "when do you want to leave?" or "when do you need to arrive, and which countries are we crossing?"