On December 30, 2013, Miller was signed by the Chicago Bears to a reserve/future contract.
On August 15, 2014, Miller was placed on injured reserve after suffering a foot injury in the preseason.
On February 27, 2015, he signed a one-year extension. In week nine against the San Diego Chargers, Miller caught Jay Cutler's 25-yard pass with one hand to score the game-winning touchdown; it was Miller's first NFL touchdown since 2011. One week later, Miller caught 5 passes for 107 yards, including an 87-yard touchdown pass from Cutler, en route to a 37–13 win over the St. Louis Rams; the catch was the longest by a tight end since Byron Chamberlain's 88-yard play in 1999 and the longest touchdown reception by a Bear since Matt Forte's 89-yard score in 2010.