During the week, traffic between 7am and 9am can be busy and this is repeated again in the afternoon and evening, with a rush hour traffic period taking place between 4pm and 7pm. If you can avoid travelling to, from or around Heathrow Airport at these times, do so as it will save you a lot of stress.

Yes, Heathrow Airport is exceptionally busy in the early morning, particularly between 6:00 AM and 9:00 AM. This period is known as the "morning rush" because of a massive influx of overnight long-haul flights arriving from North America and Asia, combined with the departure of the first wave of short-haul European business flights. In 2026, Heathrow is operating at near-record capacity, handling approximately 85 million passengers annually. Travelers arriving during this window should expect significant queues at immigration (Passport Control) and baggage reclaim. For those departing, security wait times are at their peak during these hours. If you have a flight scheduled before 10:00 AM, it is vital to arrive at least 3 hours early, even if you are only carrying hand luggage. Using the Heathrow Express or the Elizabeth Line can save time on the commute, but once inside the terminal, the sheer volume of "transfer" passengers makes the early morning hours the most hectic part of the airport's operational day.