The airport operator runs Bangkok Suvarnabhumi Airport, Don Mueang International Airport, Phuket International Airport and other gateways in the Southeast Asian country.
Total revenues fell by 6.37% to THB9095.81 million ($280 million) and AoT says non-aeronautical revenues make up 42% of income for the three-month period, which grew 6.7% to THB3698.36 million ($115.6 million).
Concession revenues made up the majority of this, surging by 5.63%, and the figure was also boosted by a 10.59% rise in service revenues, and a landing and parking charges increase of 4.8% to THB1259 million ($38.8 million).
This compares to aeronautical revenues, which dropped 6.9% dip THB5023.97 million ($157.05 million), fuelled by a 10.87% decrease in passenger service charges.
AoT says this was mainly due to the decline in the number of passengers at Suvarnabhumi Airport (-15.61%) compared to the same period last year, especially among international travellers (-17.34%).
For the nine-month period ending June 30, AoT's net profit reached THB9,947.35 million ($310.95 million), which was a decline of 10.33% over the same period last year.
Non-aeronautical revenues totalled 41% of total revenues, and increased by 8.94% to THB11,771.85 million ($368 million), while aeronautical revenues rose 2.07% to THB16,763.95 million ($524.04 million), and total revenues for the period fell 4.72% overall.