China Eastern Airlines' (SHA:600115, HKG:0670) available seat kilometers, which measure passenger capacity, fell 5.3% year on year in May, according to a Hong Kong bourse filing on Monday.
Revenue passenger kilometers, an indicator for combined passenger traffic, decreased 3.6% from a year earlier during the month.
Cargo capacity, measured through available freight tonne kilometers, decreased 4.1% from a year earlier.
Cargo and mail traffic, measured through revenue freight tonne kilometers, increased 7.4% from a year earlier.
The airline added six aircraft during the month and retired two, bringing its fleet size to 827 aircraft at the end of May.