“We are crowd-sourcing travelers to act as couriers,” says Rory Felton, the company’s founder and chief operating officer. “We are on a mission to enable anyone to travel the world for free.“

The potential discount is significant. International airfares now average around $1250, says Felton, and the fees for couriers who transport shipments can earn between $250 and $500 per one-way flight. This means that some travelers on cheaper routes could have all of their airfare cost covered, while others on pricier flights would still save a sizable amount.