How early should you actually arrive at Heathrow?
The official Heathrow guidance is "3 hours for long-haul, 2 hours for short-haul". That's a one-size-fits-all safety net — not a real answer for your flight today.
The real answer depends on six things:
- Your terminal — T2, T3, T4, T5 have different security layouts and throughput
- Day of week and time of day — morning rushes behave very differently to afternoons
- Your airline's bag-drop opening window — varies by airline
- Your passport type — EU vs non-EU matters more after EES rollout
- Live delay status on your specific flight
- Live traffic from your home postcode to the terminal
Miss any of those six and you're either sprinting through security or wasting two hours of your life.
The four terminals at Heathrow
- Terminal 2 — Star Alliance carriers (United, Lufthansa, Air Canada, etc)
- Terminal 3 — Virgin Atlantic, American Airlines, Delta, oneworld carriers other than BA
- Terminal 4 — SkyTeam carriers (Air France, KLM, Korean Air, etc)
- Terminal 5 — British Airways (short and long haul) and Iberia
Security throughput, walk times, and lounge access all differ by terminal. Always check your boarding pass for the terminal — it's the only reliable source on the day, as carriers occasionally move between terminals.
Live Heathrow queue dataUpdated hourly in our Pain Index
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When Heathrow is most likely to be busy
Peak pressure points to plan around:
- Summer holidays (July–August) — consistently the busiest stretch of the year
- Easter and October half-term — family travel surge
- The first day of any school holiday — the single busiest mornings
- Christmas week — particularly Christmas Eve afternoon
- Post-disruption days — spill-over queues continue for a day or two after any strike, weather event, or ATC outage
Parking and getting to your terminal
If you're driving, walking time from your parking to check-in varies significantly:
- Short-stay multi-storey is attached to the terminal — a few minutes' walk
- Long-stay car parks require a bus transfer — noticeably longer
- Off-site Meet & Greet times vary by operator — budget 15–20 min minimum
If you're travelling with kids, heavy luggage, or in bad weather, double whatever walk time the parking operator quotes.
Flying to Schengen? Factor in EES
The EU's Entry/Exit System adds a biometric registration step for non-EU passport holders arriving into the Schengen area. UK passport holders are non-EU post-Brexit. This affects your arrival at your EU destination, not your Heathrow departure — but the buffer matters for tight onward connections.
The app factors EES into predictions for Schengen-bound flights automatically.
What the app does that this page can't
This page is generic advice. The app is specific: it takes your exact flight details, your home postcode, your passport type, and tells you the exact time to leave home. Based on live traffic, live queue data, live flight status, and today's conditions — not yesterday's averages.
Stop guessing. Get your exact time.
The app combines live traffic from your door, today's live queue data, your airline's bag-drop rules, and current weather — and gives you one number.