Usually the inner sections of airports are closed to non-travellers. I often think that modern airports with their great offers miss out on opportunities when they restrict access to people with tickets on that day only. Imagine: you could go inside Terminal 5 and dine a last meal at with your close friend who visited you from Far-Away-Land before their long flight back home. Or imagine the family from Singapore that could enjoy some last moments in the Butterfly garden of 3 with their son departing for an exchange year at a university in the United States.
Well, the good news is that there are airports that do allow non-travellers into their inner core – the post security zone; domestic airports that is. The slightly bad news is that they are often not the most aspiring of places. Nevertheless, they do allow you to drop off or pick up your loved ones directly at the gate.