A system for coordinating operations for a plurality of unmanned aerial vehicles (“UAV”) is provided. The system generates a time-based sequence comprising one or more operations for each UAV, each operation including an execution window and a duration, identifies coincident time periods between first and second execution windows, and prepares a modified time-based sequence for each of the plurality of UAVs. The preparing includes setting at least one of a first preferred start time (“PST”) for a respective operation within the first execution window and a second PST for a respective operation within the second execution window based on at least the estimated duration of each respective operation and the coincident time periods. The setting is configured to minimize overlap between respective operations within the first and second execution windows. Modified time-based sequences for the plurality of UAVs are then provided to an operator.