Complex sentence: It is also a hub for passenger airline WestJet and cargo airline FedEx Express, and serves as an operating base for passenger airlines Air Transat, CanJet and Sunwing Airlines.
Split into simpler sentences: It is also a hub for passenger airline WestJet, as well as cargo airline FedEx Express. The airport is also an operating base for Air Transat, CanJet and Sunwing Airlines.