Flying cars will hit the U.S. before 2028 according to Uber's CEO Dara Khosrowshahi, who thinks that the aerial vehicles will be floating around above Dallas, Texas within the next ten years at some point. This is of course, just a prediction and it's entirely possible that something like this could be further away than a ten-year time frame. That said Khosrowshahi believes that it's more of a possibility than not and has reportedly stated that Uber can help solve one of the issues that could lead to flying cars, which is a growing congestion of vehicles on the road.
Khosrowshahi doesn't necessarily give any reasons for why he thinks that flying cars will be up and running within ten years, but he does note that fully autonomous cars and trucks are still ten to fifteen years away due to hurdles with the sensors and 3D mapping that still need to be overcome. With that being the case, it's not unlikely that the prediction has something to do with the belief that fully autonomous vehicles are further away than the next few years.
This wouldn't be the first time that Uber has had something to do with flying cars. Back in November for example, Uber made an announcement that it was working with NASA to develop software which would be used to manage the routes for flying taxis. Testing of this software is supposed to be starting in 2020, so within the next couple of years, and this could be software that would be used for the flying cars that Khosrowshahi sees hovering above Dallas. Flying cars would certainly require more than just management and control software for the routes, which in itself is sure to be a huge undertaking to ensure that this sort of transportation would be safe and organized in a way that keeps the vehicles from having collisions potentially crossing paths, not too unlike the way traffic systems work on the ground without management software. Whether or not flying cars arrive within ten years remains to be seen, but Khosrowshahi seems to be confident in his prediction that it will happen.