icao iata company callsign country
DL Delta Connection USA United States

note

Delta Connection is a flight connection service brand name for the hub and spoke system of U.S. mainline carrier Delta Air Lines, under which a number of individually owned regional carrier and one wholly owned regional carrier operate short and medium haul routes. Mainline carriers often use regional airlines to operate services in order to increase frequency, serve routes that would not sustain larger aircraft, or for other competitive reasons.
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