IATA "DL", a major airline of the United States, member of the SkyTeam alliance and one of the largest in the world. It operates eleven hubs: ATL, CVG, DTW, MSP, LGA, JFK, SEA, SLC in the United States, CDG in France, AMS in the Netherlands and NRT in Japan.
- Domestic hub airports: atl (Hartsfield–Jackson Atlanta International Airport, Georgia), cvg (Cincinnati/Northern Kentucky International Airport), dtw (Detroit Metropolitan Wayne County Airport, Michigan), jfk (John F. Kennedy International Airport, New York City), msp (Minneapolis–Saint Paul International Airport, Minnesota), lga (New York-LaGuardia Airport), sea (Seattle–Tacoma International Airport, Washington), and slc (Salt Lake City International Airport, Utah)
- International hub airports: ams (Amsterdam Airport Schiphol, the Netherlands), cdg (Paris–Charles de Gaulle Airport, France), and nrt (Tokyo-Narita International Airport, Japan)
- Alliance: skyteam
- Loyalty program: SkyMiles
- Lounge/club: Sky Club