Delta Air Lines, Inc. (NYSE: DAL) is a United States airline based and headquartered in Atlanta, Georgia. Delta operates an expansive domestic and international network, spanning North America, South America, Europe, Asia, Africa, the Middle East and the Caribbean. Delta flies to over 332 destinations in 57 countries (excluding codeshare), across 5 continents. Delta is the only major U.S. carrier that flies to Africa. On April 14, 2008, Northwest Airlines announced it would be merging with Delta to form the new Delta Air Lines. Once in place, the "new" Delta would become the world's largest carrier.

Delta operates hubs at Hartsfield-Jackson Atlanta International Airport, Salt Lake City International Airport, Cincinnati/Northern Kentucky International Airport, New York's John F. Kennedy International Airport, and New York's LaGuardia Airport; Delta's Atlanta hub is the largest/busiest airline hub in the world. Delta carries more passengers across the Atlantic than any other carrier worldwide. Its major transatlantic gateways are Atlanta, Cincinnati, and New York-JFK. Transatlantic service from Salt Lake City to Paris started in 2008. Its major Latin American gateways is Atlanta. The Los Angeles secondary hub was significantly reduced in 2008, ending the build up as Delta went from a high of 48 destinations from the airport to just 17.

In terms of passengers carried (approximately 119 million in 2005), Delta is the second-largest airline in the world (behind American Airlines). In terms of revenue passenger miles, Delta Air Lines is the third largest airline, after American Airlines and United Airlines. Delta Air Lines serves more destinations than any other airline in the world. In terms of total operating revenues, Delta is the sixth-largest airline in the world.

The company

Airline operations

• Comair a regional component of Delta Air Lines, Inc., - serves primarily domestic short-haul, low-density, high frequency flights.

• Delta, the "mainline" component of Delta Air Lines, Inc., - serves primarily high-volume domestic flights and long-haul international services

Aviation business related operations, divisions, and subsidiaries

• Comair, Inc.
• Comair Holdings, LLC
• Comair Services, Inc.
• Crown Rooms, Inc.
• DAL Aircraft Trading, Inc.
• DAL Global Services, LLC
• DAL Moscow, Inc., a 50/50 partnership with Aeroflot
• Delta AirElite Business Jets, Inc.
• Delta Benefits Management, Inc.
• Delta Cargo, Delta's air freight division.
• Delta Connection, a marketing brand given to flights operated by certain regional airlines on short- to mid-haul, low- to mid-volume routes, "connecting" hubs to airports where the larger "mainline" planes would either have a hard time accessing, go unfilled or too infrequently to be profitable.
• Delta Connection Academy, Inc.
• Delta Corporate Identity, Inc.
• Delta DASH, Delta's same-day small package delivery service, part of Delta Cargo.
• Delta Loyalty Management Services, LLC
• Delta Shuttle, which operates high frequency, short-haul service using McDonnell Douglas MD-88s configured with a single-class cabin. The flights operate between LaGuardia Airport and Logan International Airport; and between LaGuardia Airport and Ronald Reagan Washington National Airport. Delta Shuttle operates with the same operating certificate, callsign, IATA, and ICAO codes as Delta Air Lines, Inc., unlike Delta Connection branded sub-fleets flown by other certificated regional airlines.
• Delta Technology, LLC
• Delta Ventures III, LLC
• Epsilon Trading, Inc.
• Kappa Capital Management, Inc.