United Airlines saw passenger revenue per available seat mile rise by 3.5% to 4.5% in August compared to a year earlier.
Continuing weakness in the Chicago-based carrier's Pacific operation driven by a weak Japanese yen reduced PRASM growth by one percentage point, it says.
United will end its daily Tokyo Narita-Hong Kong flight in October and downgauge its daily San Francisco-Osaka Kansai flight to a Boeing 787-8 from a Boeing 777-200 in April 2014, in response to the weak yen.
Consolidated traffic fell 0.5% on a 1.4% decrease in capacity during August. The load factor rose 0.8 percentage points to 87.4%.
Domestic traffic was down 2.6% and capacity was down 2.8%, resulting in a 0.2 percentage point increase in load factor to 88.7%.
International traffic rose 2.2% and capacity was up 0.6%, resulting in a 1.4 percentage point increase in load factor to 87.2%.