Delta Air Lines' on-again, off-again service between the Triangle and Los Angeles is off, again.

The carrier, which resumed once-daily nonstop flights between Raleigh-Durham International Airport and LA in June, will stop it as of Nov. 28.

"With virtually every route, we monitor passenger demand for it," said Delta spokesman Paul R. Skrbec. "It's a reflection of the demand for the route. Our expectation is that come springtime, the demand will come back."

But it's uncertain whether Delta will restart the service, or when. It will depend on various factors, including tourism trends and the economy, Skrbec said.

Until then, vacationers and business travelers bound for Los Angeles will have to make connecting flights, which can add time and hassle to a trip. That includes anyone hoping to celebrate Christmas in Hollywood or New Year's Eve in Beverly Hills.

Economic developers and RDU officials have said that direct flights to the West Coast are important in attracting new businesses to this region. More than 250,000 passengers a year travel between RDU and Los Angeles.

Delta previously offered the nonstop RDU-LA service but stopped it in early 2008 as demand declined during the recession. The airline announced in March that it would restart the service.