Suvarnabhumi airport's passenger throughput looks set to break a record of more than 52 million this year, exceeding its design capacity by 15%.
Speaking on the occasion marking the airport's ninth anniversary, which falls on Monday, Suvarnabhumi airport general manager Sirote Duangratan said on Friday the airport had handled more than 400 million passengers since its opening.
Between Oct 1, 2014 and Sept 15 this year, the airport processed 50.5 million passengers, up by 12.9% over the previous period.
International passenger traffic surged 16% to 42.4 million while the domestic volume declined 0.77% to 8.13 million.
Combined aircraft movements in the period rose 5.91% to 298,459, consisting of 233,330 international (up 6.85%) and 65,129 domestic (up 2.68%).
Cargo movements inched up 0.49% to 1.23 million tonnes, comprising 1.19 million tonnes for international (up 0.43%) and 39,137 tonnes for domestic (up 2.59%).
Mr Sirote said a strategy had been adopted to make Suvarnabhumi an international gateway in Asia Pacific for both passenger and cargo traffic.
Efforts have focused on turning Suvarnabhumi into a transit hub accommodating connecting flights.
Suvarnabhumi also aims to become a certified hub for cargo transshipments in the region. To support the strategy, he said efforts have been made to ensure the second-stage expansion of the airport is carried out as planned.