British Airways uses both Terminal 3 and Terminal 5 at London Heathrow, with most flights going from Terminal 5 and some services (including various long‑haul and short‑haul routes) operating from Terminal 3.

Quick Scoop

  • Main BA hub at Heathrow: Terminal 5 is the primary home for British Airways and handles the majority of its departures and arrivals.
  • Also at Terminal 3: British Airways additionally operates a number of flights from Terminal 3, including selected long‑haul and short‑haul services, partly due to capacity limits at Terminal 5.
  • Official word: British Airways states that it operates from “London Heathrow Terminal 3 and Terminal 5.”

How to know which terminal your flight uses

  • Check your booking / e‑ticket / boarding pass – it will list the exact terminal for that flight.
  • Use the “Which London airport and terminal?” or flight‑status tools on the British Airways website or app for your date and route.
  • On the day of travel, confirm on the Heathrow airport information screens , as terminals can occasionally change for operational reasons.

In practice: if someone says “I’m flying BA from Heathrow,” the safest assumption is Terminal 5, but always double‑check, because a non‑trivial number of BA flights still run from Terminal 3.

Information gathered from public forums or data available on the internet and portrayed here.