Neighboring Rosenberg's twin city, and a similar drive to match.
Richmond sits right next to Rosenberg on the western edge of our service area, and the drive to IAH follows the same basic pattern — a genuine hour-plus trip most days, with 59/69 through Sugar Land as the main bottleneck.
60-75 minutes is the honest range. It's one of the longer regular routes we run, so we build extra buffer into pickup planning rather than cutting it close.
Depending on your exact address in Richmond, Hobby can run comparable or slightly shorter than IAH — worth checking if your airline serves both airports.
Given the distance, 3-4 hours ahead of a typical morning flight is the safer call, more if you're leaving during peak traffic windows.