ELK GROVE VILLAGE, Ill. -- United Airlines said Monday it is cutting more flights.

The nation's second largest airline will trim about 200 flights from its daily schedule at the end of the month as part of continuing cutbacks since the Sept. 11 attacks.

The new schedule calls for 1,664 flights a day instead of the current 1,850, spokesman Joe Hopkins said. It also revises departure times to curtail early-morning and late-night flying, reflecting falling passenger demand and other adjustments.

"We'll still do some flying after 7 p.m. and some before 7 a.m., just not as much," Hopkins said.

Since the attacks, which dramatically worsened an industrywide business travel slump, the Denver-based carrier already has reduced its schedule from the previous 2,400 daily flights. It also said it will cut at least 20 percent of its workforce of about 100,000 people.

The new schedule will consist of 23 percent fewer available seat miles and 27 percent fewer departures than before Sept. 11.

"We are focusing our flights on the peak hours when business and leisure travelers want to fly," said Kevin Knight, vice president for planning.

The changes will necessitate thousands of changes to existing reservations. United said it is in the process of contacting customers who have booked flights after the new schedule goes into effect.

Last week, United said it will discontinue its United Shuttle operation at the end of the month and incorporate some of those flights into United and United Express schedules.

As a sign of progress, however, United will air its first television commercial since the attacks during a Major League Baseball playoff game Tuesday night. The commercial is styled like a documentary, and shows United employees talking about changes that have occured within the company and as an industry since the attacks.