Callsign DHK is DHL Air UK
WHAT AIRLINE IS DHK?
DHK is the ICAO three-letter callsign prefix for DHL Air UK. When a radio scanner, flight tracker or radar scope shows a flight like DHK123 or DHK45XY overhead, that's a DHL Air UK aircraft talking to air traffic control.
Spot one yourself: open the live scope, enter your postcode, and tap any blip whose callsign starts with DHK for its type, registration, route and photo.