It sure looks like it.
Ever since it was announced that Bugatti was working on a successor to the Veyron called the “Chiron,” there has been constant speculation regarding what to expect. It has already been confirmed that the Chiron is due to raise the bar in the hypercar arena with a W16 engine that produces more than 1,500 hp and 1,100 lb-ft of torque. To top it off, the new Bugatti will apparently be capable of hitting 62 mph in a mere 2 seconds. Since the development of the Chiron was announced there have been a few potential prototype sightings.
And it would now appear as if a couple of Bugatti Chiron prototypes have been spotted yet again under heavy covers at the Los Angeles airport. If the cars photographed are indeed new Chiron prototypes, the likely reason for their presence in the US is to undergo modifications to bring them into compliance with US road specifications.