From junction 9 of the M23:
At the motorway roundabout, take the exit for the airport.
At the next roundabout go straight on, following signs for the North terminal.
At the next roundabout, take the fourth exit onto the A23 towards Crawley and Redhill.
Go right round the next roundabout and take the fourth exit so you are going back along the A23 the other way.
Go straight on at the first roundabout, then at the second roundabout take the second exit towards Lowfield Heath Road.
After 200 yards, take the first exit at the mini roundabout onto Charlwood Road. Airparks is about a mile and a half down the road on the right.

From junction 10 of the M23:
At the motorway roundabout, take the A2011 towards Horsham.
At the next roundabout take the third exit, staying on the A2011.
At the next roundabout, which has traffic lights, take the fourth exit onto the A23 towards Gatwick and Redhill.
Go straight on at the first roundabout, then at the second roundabout take the first exit towards Lowfield Heath Road.
After 200 yards, take the first exit at the mini roundabout onto Charlwood Road. Airparks is about a mile and a half down the road on the right.