The New Phnom Penh International Airport is a proposed development to serve the city of Phnom Penh which is being developed around 30-40km outside of the city and located in Kandal province. It will cover an area of 2600 hectares, making it the world’s ninth largest airport and It is expected to be operational by 2025. This New Phnom Penh International Airport is developed by the Cambodia Airport Investment Co., Ltd​ (CAIC) which is a joint venture between Overseas Cambodia Investment Corporation (OCIC) and the Cambodian Government's State Secretariat of Civil Aviation (SSCA), with OCIC to own 90% of CAIC. 

This Airport was announced in early 2018 and is projected to cost $1.5 billion. The construction of new the airport will be a 4F-class airport and it will be able to accommodate Airbus A380-800s and Boeing 747-800s. The 108-metre aero plane control tower will be operational by 2022, as also will be the 4,000-metre runway, VIP terminal building, solid waste building, sewerage system, cargo warehouse, aero plane petroleum station, firefighter station among other facilities. The second phase is expected to be completed by 2030 and will be able to receive 30 million passengers a year, and the third phase will be completed by 2050 when 50 million passengers per year are expected to be received. Once the new airport is finished, the real estate and construction sectors in Cambodia will attract more investors. The land around the airport has attracted a lot of investment already after it was chosen as the site of the new airport.