The peak times at London Heathrow Airport is from 10 AM to 1 PM, and 5 PM to 8 PM. Since London Heathrow Airport is the busiest airport in the UK, you'll find it jam-packed with passengers 24/7.
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We recommend getting to the airport three hours before your flight if you're travelling internationally, or two hours if you're travelling domestically or to Europe.
Unsurprisingly, Heathrow Terminal 5 took the top spot. As the main hub for long-haul flights from British Airways, Iberia and American Airlines (just to name a few), T5 recorded over 100,000 passengers in September alone. Heathrow's Terminals 3 and 2 ranked similarly highly, coming in at fifth and sixth respectively.
Allow between 30 minutes and 2 hours. Immigration queueing times have increased this week (some groups have been taking nearly two hours to reach arrivals from touchdown) but it's still very inconsistent so Peter's comment above is valid.
Unsurprisingly, Heathrow Terminal 5 took the top spot. As the main hub for long-haul flights from British Airways, Iberia and American Airlines (just to name a few), T5 recorded over 100,000 passengers in September alone.
We recommend getting to the airport three hours before your flight if you're travelling internationally, or two hours if you're travelling domestically or to Europe.
London's Heathrow Airport has launched a six-month trial—aptly called “Heathrow Timeslot”—where travelers can pre-book a security slot, meaning that you may be able to avoid facing any lines whatsoever at security and effortlessly zoom straight through to the lounge.
The General Guideline for How Early You Should Get to the Airport. Generally speaking, most airlines advise that you arrive at the airport at least 2 hours prior to a domestic flight, and at least 3 hours prior to an international flight.
Check-in closes 60 minutes before long haul flights depart and 45 minutes before short haul flights depart. Pass through security at least 35 minutes before your flight departs. Be at the boarding gate at least 20 minutes before your flight departs. See the 'Boarding' section, below.
London Heathrow Airport (LHR) continues to be the Busiest Airport in Europe with 4 million seats in November 2023. Istanbul Airport (IST) is the second busiest airport with 3.6 million seats.
Some passengers do not print their passes, but use digital boarding passes on their mobile phones. Every passenger needs a boarding pass to get through security at Heathrow.
Most airlines recommend arriving at the airport three hours before departure for international flights. It's common for international flights to start boarding earlier than domestic flights (the aircraft are often larger and have higher passenger capacities), which accounts for the earlier recommendation.
Everyone who boards an aircraft at Heathrow has to be security screened to UK government standards. Even if you've already been through security checks at another airport, we're obliged to screen you again before you fly from Heathrow.
You can walk between Terminals 2 and 3 via the pedestrian underpass. The route is well signposted and can be followed on our interactive Heathrow map. If you have an impairment or mobility difficulties, find out how to request assistance.
Are flights busy at 6AM? The probability for a delay is at its lowest (20% or below) from 6am – 11am. Early morning flights have less runway traffic, planes ready to take off from the night before, and fewer planes already in the air. Days of the week can impact the ticket price, along with delays.