For peace of mind, allow at least 2 hours before short-haul flights when departing for Gatwick, and more for long-haul

https://devinxvkd523.theburnward.com/how-to-get-to-gatwick-airport-complete-2026-transport-guide-2

For peace of mind, allow at least 2 hours before short-haul flights when departing for Gatwick, and more for long-haul. Add buffers for rush hour or weekend engineering.