Watch CNBC's full interview with Delta CEO Ed Bastian

Delta CEO Ed Bastian sits down with CNBC's Phil LeBeau and the 'Squawk Box' team to break down why the airline expects to turn a pretax profit of about $200 million in the fourth quarter. Bastian also explains how the worrisome omicron coronavirus variant may impact its first quarter next year and provides a business travel forecast. "We're very optimistic about our spring and summer outlook," Bastian tells CNBC.