Delta Air Lines has trimmed its nonstop service to Paris from Pittsburgh International Airport by one flight a week through the winter.

The reduction, from five flights a week to four, corresponds with an overall cut of about 15 percent in international flights to match a drop in global demand, Delta spokesman Kent Landers said yesterday. The airline dropped the Pittsburgh to Paris flight Oct. 1.

Under its agreement with the airport, the state and the Allegheny Conference on Community Development, Delta has the right to run four or five nonstop flights a week to Paris during nonpeak times, Mr. Landers said.

Delta expects to return to five flights a week in June, he said.

Ken Zapinski, Allegheny Conference senior vice president of the transportation and infrastructure program, said the reduction was not a surprise.

"It was anticipated when the contract was signed that it probably would go to four times a week during the winter months," he said.

The Delta flights are backed by up to $9 million in potential state and conference subsidies, triggered if flight revenues fall short of agreed-to targets.

With the cut of the flight, the agreed-to target level is reduced as well, Mr. Zapinski said.

Although the flight is expected to return in June, travelers shouldn't take that for granted, said JoAnn Jenny, an airport spokeswoman.

"We need to make sure we demonstrate the demand to ensure its return to five days," she said.

In October, the nonstop flight leaves from Pittsburgh on Sunday, Wednesday, Thursday and Saturday. Return flights from Paris are on Sunday, Monday, Thursday and Friday.

Next month the flights will leave Pittsburgh on Monday, Wednesday, Thursday and Saturday and return on Sunday, Tuesday, Thursday, and Friday.

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