Delta Airlines is one of the major airlines of the United States and a legacy carrier. The airline, along with its subsidiaries and regional affiliates, operates over 5,400 flights daily and serves an extensive domestic and international network that includes six continents. Delta is headquartered in Atlanta, Georgia and is one of the world's oldest airlines in operation. The airline is a member of the SkyTeam alliance and has codeshare agreements with several airlines. Delta One is the airline's premier business class product, available on long-haul international flights, as well as transcontinental service from New York–Kennedy to Los Angeles or San Francisco. Delta Air Lines is a U.S. global airline leader in products, services, innovation, reliability, and customer experience. Delta Air Lines faces intense competition from other major airlines in the US airline industry, including JetBlue Airways Corporation, American Airlines Group Incorporation, and Southwest Airlines.