The time required to clear passport control at Heathrow Terminal 4 varies significantly based on your nationality and the current arrival volume. For those eligible to use the eGates (holders of biometric passports from the UK, EU, USA, Canada, Australia, and several others), the process is a high-fidelity automation that typically takes 10 to 20 minutes during non-peak hours. However, if you must wait in the manual "All Other Nationalities" line, wait times can stretch to 45 to 90 minutes or more during peak arrival windows, especially when multiple long-haul flights from Asia or the Middle East land simultaneously. In 2026, Heathrow has invested in more staffing and biometric technology, but T4 often hosts several large-capacity wide-body aircraft (like the A380s from Qatar or Etihad), which can cause temporary bottlenecks. For a smooth experience, ensure your landing card (if required) is filled out before landing and have your boarding pass and passport ready to ensure you can move through the "sterile" zone as quickly as possible.