Callsign BEL is Brussels Airlines
WHAT AIRLINE IS BEL?
BEL is the ICAO three-letter callsign prefix for Brussels Airlines. When a radio scanner, flight tracker or radar scope shows a flight like BEL123 or BEL45XY overhead, that's a Brussels Airlines aircraft talking to air traffic control.
Spot one yourself: open the live scope, enter your postcode, and tap any blip whose callsign starts with BEL for its type, registration, route and photo.