While SpaceX Dragon Crew could still hope flew on 2018, then followed its inaugural flight with passengers on April 2019.
Boeing and SpaceX currently developing spacecraft that is part of NASA's Commercial Crew program, a program to fly humans to the International Space Station (ISS) using private spacecraft. CST-100 Starliner developed Boeing has a capacity of 8 people and could fly into space on Atlas V rocket is made by United Launch Alliance.
While SpaceX Dragon cargo capsule, modifying him to carry 3 people in it. To be able to fly, this capsule will take his homemade rocket Falcon 9.
Before the aircraft could be operated, NASA wants both companies to test flying, either with or without passengers. His goal was to see if a second capsule was ready for regular travel to the ISS.
Starliner himself originally scheduled to test first flew without passengers in August and flew with passengers in November. But with anomalies on the engine of the plane, Boeing now postpone the target of it being the end of 2018 or early 2019.