from Swissport's website for YYZ:
SWISSPORT YYZ AIRLINES
OUR CUSTOMER AIRLINES
Aer Lingus
Air France
Air Transat
Alitalia
Arke Fly
Atlas Air
Austrian Airlines
Avianca
Azores Airlines
British Airways
Brussels Airlines
CanJet
Caribbean Airlines
Cathay Pacific Airways
Cathay Pacific Cargo
China Eastern Airlines
Copa Airlines
Cubana de Aviacion
EgyptAir
El Al Israel Airlines
Emirates
Etihad Airways
EVA Air
Fly Jamaica
Hainan Airlines
Jet Airways
KLM Royal Dutch Airlines
Korean Air
LATAM Airlines Group
LOT Polish Airlines
Lufthansa
Miami Air International
Nolinor Aviation
Paradigm Air
Philippine Airlines
PIA
Porter Airlines
Saudi Arabian Airlines
Sunwing Airlines
Swiftair
TAP Portugal
Turkish Airlines
UPS
Wow Airlines
Xtra Airways