To land at John Wayne Airport (SNA) on time, choose a flight that takes off from Macomb, IL (MQB-Macomb Municipal) before 3 PM. The likelihood of cancellations is 22% higher, on average, for departures after this time.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.