Air China's (HKG:0753, SHA:601111) passenger capacity inched up 0.4% year over year to about 28.7 billion available seat kilometers in March, according to a Tuesday filing with the Hong Kong bourse.

Passenger count jumped 0.5% to 12.4 million during the month.

Cargo capacity grew 1.3% year on year to 1.08 billion available freight tonne-kilometers, while cargo carried increased 3.9% to 123,433.5 tonnes, the filing said.