The airport is divided into three concourses, with each one being used for passenger traffic heading to certain areas. They include a domestic and International jetty accessible via check-point A. There is also a separate departure wing to accommodate international flights to the United States utilizing the airport's US border pre-clearance facilities. It is accessible via check-point C.

The domestic jetty, is divided into two parts, one being a satellite jetty, and the other part is a wing attached to the main airport building. The main jetty holds 16 gates: 1–12, 15, and 47-49 mostly used for medium size and heavy aircrafts. The satellite jetty has another 10 gates: 17, 19, 21, 23, 25, 27, 28, 30, 32, 34. There are only two boarding bridges located inside the satellite, the other gates are mostly used for prop aircrafts like the Bombardier Dash 8 family.

The jetty has many cafes and restaurants available to passengers, a new food court is scheduled to open in the fourth quarter of 2016. The Air Canada Maple Leaf Lounge is located between gates 3 and 5.

The International concourse, which is also accessible by the check-point A, is dedicated to flights with destinations outside of Canada and the United States. The International terminal holds 12 gates: 50–53, 55–62. Gates 53 and 62 are used by Passenger Transfer Vehicles.

Finally there's a concourse dedicated to all U.S. bound flights. This one is accessible by the check-point C and it holds 18 gates: 72–89.