Callsign WJA is WestJet
WHAT AIRLINE IS WJA?
WJA is the ICAO three-letter callsign prefix for WestJet. When a radio scanner, flight tracker or radar scope shows a flight like WJA123 or WJA45XY overhead, that's a WestJet aircraft talking to air traffic control.
Spot one yourself: open the live scope, enter your postcode, and tap any blip whose callsign starts with WJA for its type, registration, route and photo.