-- Updated at 7:42 p.m. ET  There will be no more airline flights to or from New Orleans until Hurricane Isaac passes.  The airport is one of four that have suspended flights indefinitely because of Isaac. The others: Gulfport-Biloxi International in Mississippi, Alabama's Mobile Regional and Florida's Pensacola International airports.  And a significant number of delays are being reported at other airports in the region because of Isaac, which was forecast to make landfall late tonight or early Wednesday morning.  FLIGHT TRACKER: Is your flight on time?  For example, Delta spokesman Morgan Durrant tells The Atlanta Journal-Constitution that some of the carrier's cancellations are coming at "more inland, small airports like Hattiesburg, Miss. and LaFayette, La. to name just two."  Still, the biggest number of cancellations are coming from busy Louis Armstrong New Orleans International Airport, which says all airlines flying to the city "will cease operation at the end of their schedule (Monday). There are no flights scheduled for Tuesday, Aug. 28."  The airport also warned that it "is not an evacuation shelter and people will not be allowed to stay in the terminal during the storm."  It was unclear whether the decision to halt flights was a decision made by the airports or by the airlines.  Louis Armstrong New Orleans International executive director Iftikhar Ahmad said at a Monday news conference that director that airlines "will run today but are canceling tomorrow."  However, AP writes "he did not respond to a request for clarification about who made the final call to cancel flights."  A comment from American Airlines suggests that the airport made the call.  "We could have kept flying for a big chunk of Tuesday, but you can't land at a closed airport," AA spokesman Ed Martelle says in an e-mail to AP.  To the east, all flights at Mississippi's Gulfport-Biloxi International Airport (GPT) will be suspended as of 11 a.m. local time (noon ET).  Clay Williams, GPT's executive director, tells The Associated Press that the airport likely will remain closed on Wednesday as well before flights resume on Thursday.  Cancellations also are being reported at other airports along the northern Gulf Coast, including at Pensacola, Fla., and Mobile, Ala.  Already, more than 1,300 cancellations attributed to Isaac have been reported in Florida. That number could approach 2,000 once the New Orleans and northern Gulf Coast disruptions are added to the tally.  BOOKMARK: Add Today in the Sky to your favorites  TWITTER: You can follow me at twitter.com/TodayInTheSky
Airlines are rapidly paring flights schedules to New Orleans and the Gulf Coast as Tropical Storm Isaac draws closer to the shoreline.