Iowa: Will Power, Team Penske Chevrolet, Simon Pagenaud, Team Penske Chevrolet, Josef Newgarden, Team Penske Chevrolet, Takuma Sato, Rahal Letterman Lanigan Racing Honda, Alexander Rossi, Andretti Autosport Honda, start
Will Power, Team Penske Chevrolet, Simon Pagenaud, Team Penske Chevrolet, Josef Newgarden, Team Penske Chevrolet, Takuma Sato, Rahal Letterman Lanigan Racing Honda, Alexander Rossi, Andretti Autosport Honda, start