Terminals · LGA
Air Canada departs from Terminal B at LaGuardia Airport (LGA). We verified this against the airport's own sources on June 27, 2026 — airlines do move terminals, so we date every check.

Air Canada departs from Terminal B at LaGuardia Airport (LGA). Terminal B, Eastern Concourse (Gates 40-59); includes Air Canada Express. Verified June 27, 2026.
Terminal B Departures Hall, Level 3 (ticketing/check-in and security). Bag drop usually closes 45 minutes before departure, so build that into your morning.
Not that we've found. We confirmed Air Canada departs from Terminal B at LGA as of June 27, 2026. Airlines do shuffle terminals, so we re-check and date every change.
Canada-bound flights (Toronto, Montreal) operate through U.S. CBP preclearance in Canada, so they depart from / arrive at Terminal B as domestic-style flights; LGA has no separate international/customs terminal.
Not sure which building that is? See all LGA terminals with the airport map and how to get between them. Then let your Leave-By Time count backward from your flight — today's LGA security wait, your drive, and the walk to your gate — so you leave with room to breathe.