Improving the efficiency of ground surface movement is a key preoccupation of airline and airport operators. As taxi-out times increase, take-off queues are likely to grow and impact the on-time arrivals and departures at a specific airport and beyond. This article utilizes reliability analysis to identify the mean time to taxi-out delay as an indicator of imbalance between capacity and demand to prevent delays. The study shows that taxiway improvements and virtual queue departure management contributed to reduce the meantime to taxi-out delay from 18.53 in 2007 to 8.11 minutes in 2011.