In reality, airdrops are a last resort by aid organizations -- one that's expensive, inefficient in comparison with road convoys and a possible hazard to civilians.
"Airdrops are a delivery mechanism when all other options fail," said Greg Barrow of the U.N. World Food Programme.
"A single delivery with a convoy of trucks by road in one day would take the equivalent of five to six weeks by aircraft -- because the amount you can carry is so much smaller."
The World Food Programme has drawn up plans to make airdrops to 19 besieged areas in Syria -- though it will need funding and Syrian government permission before going ahead.
The U.N. program missed a June 1 deadline by the International Syria Support Group (made up of world powers, including the United States, Britain and France) to make airdrops if the Syrian government had not given permission to access the besieged areas -- regions where up to 592,000 people are trapped, according to the United Nations.
But what's actually involved in an airdrop? Here's a look at the challenges involved:
Get a team on the ground
"We cannot just fly around cities dropping food from the air -- the use of airspace is highly regulated and so we need permission," Barrow said.
"Particularly in a country which is at war, such as Syria," he said, adding that the safety of the crew was also a concern.
Once a safe flying area is agreed upon, a team on the ground coordinates the drop with those in the air.