In his second NBA season, Holiday appeared in a career-high 66 games for the Pacers. He nearly doubled his per-game minutes average from last season, resulting in new career-highs nearly across the board. In 24.5 minutes per game, Holiday posted averages of 9.5 points, 2.4 rebounds, 3.4 assists and 0.8 steals. The UCLA product shot 41.4 percent from the floor, including a career-best 39.4 percent from three. He also hit 85.1 percent of his free throws. Making his first start of the season on Nov. 6 against Washington, Holiday finished with 18 points and two rebounds in 31 minutes. He went on to start eight consecutive games from Nov. 6 through Nov. 23, averaging 14.0 points, 5.0 assists, 3.9 rebounds and 1.1 steals over that span. In a Dec. 28 matchup against New Orleans, Holiday posted a season-high 25 points in 33 minutes. He registered double-digit assists four times, including a season-high 13 on Nov. 18 against Brooklyn. In a win over Charlotte on Dec. 15, Holiday hit a season-high nine free throws on 10 attempts. In a Dec. 23 win over Toronto, he drained a season-best five three-pointers. In all, Holiday hit multiple threes in 23 regular-season contests. Holiday appeared in all four of the Pacers' playoff matchups against the Heat. In 18.0 minutes per game, he averaged 7.8 points, 2.5 assists, 1.3 rebounds and 1.0 steal. In Game 2, Holiday started and scored a playoff-career-high 12 points, to go with five assists.

Aaron Holiday was selected by the Pacers with the 23rd pick of the 2018 NBA Draft. As a rookie, he saw action as a reserve in 50 games. Holiday managed just under 13 minutes per game on the floor. The 6-foot-1 point guard averaged 5.9 points, 1.3 rebounds and 1.7 assists per contest. His best game of the season came early in the year, as Holiday accumulated a career-high 19 points and seven rebounds in a blowout win over Utah on Nov. 19. The late January injury suffered by Victor Oladipo opened up minutes in the Pacers rotation for Holiday. From Jan. 26 to Mar. 9, Holiday played 18 minutes per game and averaged 6.9 points, 2.0 and 1.2 made threes over nine games. Holiday showed proficiency on the defensive end. He collected at least one steal in 16 games, and had at least one block in 10 contests. Holiday recorded a career-best three thefts against Sacramento on Dec. 8, and registered two rejections on two separate occasions. Holiday's Pacers finished at 48-34 and lost to Boston in the first round of the playoffs.