What Terminal is WestJet Airlines at YYZ? WestJet Airlines operates from Terminal 3 at Toronto Pearson International Airport. Travelers flying with WestJet can check in, go through security, and board their flights from this terminal. Terminal 3 offers a variety of services, including dining, shopping, and comfortable waiting areas. It's recommended to arrive early to allow enough time for baggage drop-off and security screening. Always verify your terminal and gate information before heading to the airport, as details can change.