SUB stands for Surabaya Juanda Airport, while PNH stands for Phnom Penh Pochentong Airport. These codes are often called IATA codes, a set of identifiers established by IATA (International Air Transport Association) that is widely used by airlines and the aviation industry. Siem Reap Airport (REP), Krong Preah Sihanouk Sihanoukville Airport (KOS), Krong Khemara Phoumin Dara Sakor Intl Airport (DSY) are some additional IATA codes for airports related to your trip. Find deals