Northeast Airlines was an American trunk carrier, a scheduled airline based in Boston, Massachusetts that chiefly operated in the northeastern United States, and later to Canada, Florida, the Bahamas, Los Angeles and other cities. It was acquired by and merged into Delta Air Lines in August 1972.

Delta Air Lines is one of the major airlines of the United States and a legacy carrier headquartered in Atlanta, Georgia. The United States' oldest operating airline and the seventh-oldest operating worldwide, Delta along with its subsidiaries and regional affiliates, including Delta Connection, operates over 5,400 flights daily and serves 325 destinations in 52 countries on six continents. Delta is a founding member of the SkyTeam airline alliance. As of the end of 2022, it had 90,000 employees.