The idea may seem far-fetched but with self-flying drones available for less than $1,000, "the basic building blocks of the technology clearly are available," said Mike Sinnett, Boeing's vice president of product development.

Jetliners can already take off, cruise and land using their onboard flight computers and the number of pilots on a standard passenger plane has dropped to two from three over the years.

Sinnett, a pilot himself, plans to test the technology in a cockpit simulator this summer and "fly on an airplane next year some artificial intelligence that makes decisions that pilots would make", he said.

Self-flying aircraft would need to meet the safety standards of air travel, which had its safest year in 2016, according to the Aviation Safety Network. They would also need to convince regulators who don't yet know how to certify such planes.