A United Airlines plane taxis at San Francisco International Airport on Tuesday. (Photo by Justin Sullivan)Getty ImagesLike Delta a week ago, United Airlines reported strong fourth quarter results and provided optimistic guidance. Both beat analyst estimates. United released earnings after the market closed on Tuesday.Speaking on CNBC on Tuesday afternoon, United CEO Scott Kirby said, “As we enter 2026, there is really cause for optimism. Demand is really strong. Business demand is up well into the double d ...