This is the first time a piloted eVTOL vehicle has flown from one public airport to another. One of the FAA's key certification requirements is that an aircraft must be able to safely fly within airspace occupied by other aircraft.

Joby Aviation has conducted its first piloted flight between two public airports, the latest milestone to be touted by eVTOL aircraft developers eager to show their progress. The pilot-production aircraft flew from Marina to Monterey airports in California on Aug. 13, a distance of 10 mi. Involving...