DALLAS – FedEx Corp. boosted quarterly profit by 7 percent this summer despite a dip in revenue at its express-delivery unit, and it will raise prices on many U.S. shipments in January.

The weak global economy is still creating turbulence in FedEx’s air-shipment business. But its ground-shipping unit continues to churn out strong profits – operating income was twice that of the express business.

FedEx said Wednesday that it earned $489 million in the June-through-August quarter, which topped analysts’ expectations.

Shares of FedEx rose $5.57, or 5 percent, to finish at $116.25, after rising to $116.95 during the session, the highest intraday level since July 2007.

The shares have gained 27 percent so far this year.

FedEx left unchanged its forecast for full-year profit in the fiscal year that ends in May 2014. It expects earnings per share to rise between 7 percent and 13 percent, which would be between $6.63 and $7.01. Analysts surveyed by FactSet expect $6.97 per share.

The company said that it will raise U.S. express-shipping rates by an average of 3.9 percent Jan. 6. Prices for ground shipments in 2014 will be announced later this year; the freight segment imposed a 4.5 percent rate hike in July.

Express deliveries account for 60 percent of the company’s revenue, but that unit’s revenue was flat in the August quarter.

Graf said the company was still committed to its goal of boosting the unit’s operating profit by $1.6 billion by the end of May 2016.

FedEx continued to see a decline in international priority deliveries as customers shift to slower but less-expensive shipping options, including ocean freight. This trend has been noticeable in shipments of consumer electronics from Asia, and FedEx has responded by reducing air cargo capacity between Asia and the United States.