The Braves will use Delta to bring fans a first-class experience in the new SunTrust Park.The Atlanta-based air carrier will sponsor an 18,000-square-foot lounge with walnut wood ceilings, memorabilia displays, two kitchens and a 30-foot-long bar with a marble-slab top — along with a more casual sports bar with 20-foot-long televisions — inside the new stadium when it opens in 2017.