Delta Air Lines is the United States's largest airlines. In terms of passengers flown per year, it is the largest airline in the world thanks to its merger with Northwest Airlines in October 2008. Delta flies to more destinations worldwide than any other airline.

Due to declining demand to service from the U.S. to Mexico, presumably from the swine flu outbreak, Delta announced that it will be reducing flights to Mexico on May 1, 2009.The Associated Press: US carriers cutting service to Mexico (May 1, 2009)

1. Fleet Size: 440
2. Stock Symbol (NYSE): DAL
3. Annual sales (2007): $19.154 billion
4. Year Established: 1928
5. Industry: Aviation
6. Frequent Flyer Program: Delta SkyMiles
7. Alliance affiliation: SkyTeam
8. Reservations: 1-800-221-1212
9. HQ: Atlanta, Georgia
10. Chairman: John Smith
11. CEO: Richard Anderson
12. CFO: Ed Bastian
13. Staff (2007): 55,044
14. Subsidiaries:
15. Airline named after Mississippi Delta where airline began

• 1924: Huff Daland Dusters crop-dusting company formed in Monroe, Louisiana
• 1929: Huff Daland Dusters changes name to Delta Airlines
• 1935: Delta offers first nighttime service
• 1941: Delta moves to Atlanta
• 1955: Delta pioneers use of "hub and spoke" service
• 1966: Crop-dusting service ends
• 1972: Delta purchases Northeast Airlines; begins servicing East Coast cities
• 1981: Launches frequent flyer program
• 2000: Begins SkyTeam alliance
• 2003: Begins subsidiary low-cost service with Song Airlines
• April 30, 2007: Delta leaves bankruptcy protection
• April 14, 2008: Announces merger with Northwest Airlines; combined airline will keep Delta name

On January 7, 2009, a man on a Delta Air Lines flight stepped out of his seat, started running though the plane and said he had a bomb shortly after the plane landed in Los Angeles. Several passengers stopped the man as he approached the door of the plane. The man was arrested.CBS 2: Delta Passengers Have Bomb Scare Before Takeoff (January 7, 2009)There was no bomb found on the man, but the plane was searched.Fox News Los Angeles: Man Claims To Have Bomb Aboard Delta Flight (January 7, 2009)