At YYZ, remain airside—use lounges or food courts and move toward your gate early since processing slows during peak periods.
We recommend you stay airside: Pearson is large and processing times vary, making short exits risky.
A short downtown visit via UP Express is possible if immigration is smooth.
Treat this like a proper city break. Downtown or waterfront neighborhoods work well for food, walks, and attractions. Public transit is reliable, distances are manageable, and the city rewards unhurried exploration, especially if you keep plans centered and flexible.