Heathrow Airport Connection Times: The Complete Terminal Transfer Guide
What is the minimum connection time at Heathrow?
Airlines recommend 60–90 minutes for same-terminal connections and 90–120 minutes for terminal changes on a single ticket. Self-connecting passengers on separate tickets need 3–4 hours minimum.
Do I have to go through security again when connecting at Heathrow?
Yes. All connecting passengers clear security screening again at their departure terminal, even on the same ticket within the same terminal.
Can I walk between terminals at Heathrow?
Only between Terminal 2 and Terminal 3, via an underground tunnel (5–10 minutes). All other terminal transfers need a train or bus.
What happens if I miss my connection at Heathrow?
On a single ticket, the airline must rebook you on the next available flight at no charge, though you may face long waits at peak periods. On separate tickets, you must buy a new ticket at walk-up prices.
How long does it take to transfer from Terminal 3 to Terminal 5?
Allow 45–75 minutes, including the flight connections bus (15–20 minutes), security re-screening (15–40 minutes depending on the time of day) and the walk to the gate (10–15 minutes).