美国解除加勒比海空域限制，多家航司恢复该地区航班

Core Viewpoint - The U.S. Department of Transportation announced the lifting of airspace restrictions over the Caribbean, allowing airlines to resume normal operations following military actions against Venezuela [1] Group 1: Airline Operations - Major airlines such as United Airlines, American Airlines, and Delta Air Lines are preparing to resume flights to the Caribbean region on January 4 [1] - Delta Air Lines has adjusted its resource deployment in response to the lifting of restrictions [1] - American Airlines plans to increase capacity by adding over 3,700 seats for flights to the Caribbean as part of its regular service resumption [1] - Spirit Airlines resumed its flights to the Caribbean on January 4 after the Federal Aviation Administration's airspace closure directive was lifted [1]