AC domestic flight arrives at Terminal 1
AC across-border flight departure at Terminal 2
You have to transfer from Terminal 1 to Terminal 2

Inter-Terminal Shuttle Bus service between terminals:

While the GTAA’s free inter-terminal shuttle has been in service for some time, the improved look and design of the buses are sure to catch the
attention of visitors to Toronto Pearson International Airport. As a customer service initiative, the GTAA has appropriately termed its Inter-terminal service the “LINK”. Passengers travelling through Toronto Pearson will be able to easily identify the LINK’s bold new look and transfer free of charge between Terminals 1, 2 and 3.
Inter-Terminal Shuttle Bus Service
To connect to a flight in a different terminal, the GTAA’s courtesy inter-terminal shuttle buses are available at curbside on the departures level of each terminal. Shuttle buses are wheelchair accessible. View the route table

Terminals 1, 2 and 3
Midnight - 6:00 a.m. every 15 minutes
6:00 a.m. - 10:00 p.m. every 8 minutes
10:00 p.m. - Midnight every 15 minutes