Delta Air Lines’ first Airbus A321neo completed its inaugural flight recently from Boston Logan International Airport to San Francisco International Airport. The fuel-efficient planes provide Delta passengers with an improved cabin experience, including an industry-leading domestic first class seat. The A321neo offers 20% better fuel efficiency over the airline’s current A321ceos. The new A321neos can seat 194 customers, with 20 in first class, 42 in Delta Comfort+ and 132 in the main cabin. Delta has purchase commitments for a total of 155 A321neos and is scheduled to take delivery of these a…