Yes, you can generally arrive early for your Purple Parking reservation at major UK airports like Heathrow or Gatwick, but there are some logistical caveats. Most Purple Parking facilities allow for a "grace period" of about two to three hours before your scheduled arrival time without any extra charge. If you arrive significantly earlier than that, the staff will usually still accept your vehicle, but you may be subject to an additional fee equivalent to one extra day of parking, as their capacity management is based on the booking windows. In 2026, it is highly recommended to update your booking online via their "Manage My Booking" portal if you know your plans have changed; this ensures a shuttle will be ready for you and helps avoid any surcharges. If you arrive early due to a sudden change in traffic, simply notify the attendant at the barrier, and they will direct you on how to proceed based on the current lot occupancy.