On 12 July 2015, at the Milwaukee Mile, Bourdais dominated the field and had the entire field a lap down at one point and won, his second of the 2015 season. He finished 10th in points. After KV Racing went down to one team for 2016, Bourdais struggled with a lone win again at Detroit. He finished in 14th in points for 2016. In October 2016, it was announced that Bourdais would make the change to Dale Coyne racing to drive the number 18 for the 2017 season. His KVSH race engineer Olivier Boisson would also follow him to DCR.