Family group going on holiday?

A family picture taken at a terrace or similar location. There are people in the background who are seated and watching something - my temptation is to suggest this is possibly an airport somewhere and the family are about to fly, or have just flown? I  certainly remember in the 1960s going on a school trip to London Airport to see the planes, so I know there were viewing platforms built for this activity at that time. The actual location and date unknown unfortunately.