Callsign DLH is Lufthansa
WHAT AIRLINE IS DLH?
DLH is the ICAO three-letter callsign prefix for Lufthansa. When a radio scanner, flight tracker or radar scope shows a flight like DLH123 or DLH45XY overhead, that's a Lufthansa aircraft talking to air traffic control.
Spot one yourself: open the live scope, enter your postcode, and tap any blip whose callsign starts with DLH for its type, registration, route and photo.