Seoul's Gimpo airport will undergo a won (W) 250 billion ($230 million) upgrade, with a target for completion in 2017.
The domestic terminal, which opened in 1980, has to be upgraded because of its aging facilities, and to meet the growth of low-cost carriers, says Korea Airports Corp (KAC).
Its departure lounge will be expanded by 2,220m² (23,900ft²) to cope with the high demand during the peak holiday seasons, and four more security checkpoints will be added to reduce waiting time.
Three more boarding gates will also be added to the existing nine gates and its check-in counters will be remodelled to enable a faster and more convenient check-in process.
The upgrading will live up to the airport's vision of being more passenger-oriented, says KAC's president and chief executive Sung Si-Chul.
Gimpo, which handles more than 20 million passengers annually, is located approximately 52km (32 miles) from Seoul. It was the capital's main gateway before Incheon International Airport opened its gates in 2001.
Innovata schedules show carriers such as Asiana Airlines and Korean Air serve the airport with domestic and select international services.