AOT director Nitinai Sirismatthakarn said the opening of Terminal 2 will enable the airport to adequately accommodate up to 30 million passengers a year.
After the opening the second terminal, he said AOT will then renovate the first terminal to be more modernised.
He said Terminal 2 which is scheduled to open on Friday is filled with restaurants and stalls and toilets at 44 locations.
Besides, he said, AOT will also open “sleep box” service at Terminal 2 to serve night passengers who have to wait for late night flights.
There will be 25 sleep boxes altogether, but initially only five will be on service, he said.
The service fee will be based on hours spent.
He also revealed that AOT has plan to invest over 10 billion baht on its Phase 3 development plan to improve the unused domestic flight terminal and build new passenger terminal to connect the Don Mueang electric train station where the Red Line, Airport Link and Phyathai -Don Mueang adjoin.
A new parking building is also under the development phase that will have space for 3,000 cars.
The AOT will forward the documents development plan to its board for approval on March 23.
Presently Don Mueang airport serves 650-680 flights daily, 70% of which are domestic flights, with 80,000-100,000 passengers a day.