Horley is a town in the borough of Reigate and Banstead in Surrey, England, south of the towns of Reigate and Redhill. The county bord…Horley is a town in the borough of Reigate and Banstead in Surrey, England, south of the towns of Reigate and Redhill. The county border with West Sussex is to the south with Crawley and Gatwick Airport close to the town.