ULA Plans First Vulcan Launch For 2021 Written 26 October 2018

Space News reports that United Launch Alliance (ULA) now expects to “perform the first launch of its next-generation Vulcan rocket in the spring of 2021, a slip of nearly a year that the company says is due to requirements of a recent Air Force award.” During a panel at the American Astronautical Society’s Wernher von Braun Symposium Thursday, ULA COO John Elbon cited “good progress” on the vehicle’s development, and added, “Our first certification flight is targeted for April of ‘21. We were really excited about the results of the Air Force’s LSA procurement. We’re off and marching.” ULA had until September planned for a 2020 launch. Speaking after the panel, Elbon “said the shift in the first launch to April 2021 is linked to the requirements of the LSA award from the Air Force.” 
More Info (Space News)