How long should I leave to get through security at Heathrow?

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.



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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.

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It could take 15 to 30 minutes after touchdown till you deplane. You then have to clear immigration & customs which can take anywhere from 15 minutes (on a very good day) to an hour (assuming you have to claim and recheck your luggage).

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In my experience of LHR I would estimate security to take about 25 minutes.

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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.

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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.

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Heathrow's rush hours are 7am to 10am and 5pm to 8pm on weekdays, with particularly dense traffic on Friday evenings and the first day of any school holiday.

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The airport is owned and operated by Heathrow Airport Holdings. In 2022, it was the second-busiest airport in the world by international passenger traffic and the second busiest airport in Europe.

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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.

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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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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.

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Unfortunately, due to the situation with Covid-19, we are currently unable to offer our Fast Track service. We apologise for any inconvenience and look forward to assisting you in the future.

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We recommend that you allow the following minimum connection times: 1 hour for connections within the same Heathrow terminal. 1 hour 30 minutes for connections that require travel between terminals at Heathrow.

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Two to three hours is the minimum recommended time for an international layover, but more might be needed. Sally French is a travel rewards expert who joined NerdWallet in 2020. She previously wrote about travel and credit cards for The New York Times and its sibling site, Wirecutter.

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We recommend that you allow the following minimum connection times: 1 hour for connections within the same Heathrow terminal. 1 hour 30 minutes for connections that require travel between terminals at Heathrow.

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When you're traveling outside of the United States, we suggest arriving at least 3 hours prior to your departure. You must be checked in at least 1 hour before your scheduled departure.

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The general guideline on how early to get to the airport for a domestic flight is 2 hours. However, those traveling at a very busy time of year or out of a large airport might want to allow more time.

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The recommended layover time for international flights is generally longer, as you will have to go through customs and immigration before boarding your next flight. In most cases, a 30-minute layover for domestic flights and an hour for international flights is considered a minimum, or short, layover.

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Terminal 5, which opened on March 27, 2008, was designed by Rogers, Stirk, Harbour & Partners. It was built at a cost of £4.3 billion. It is exclusively used by British Airways and Iberia and has the capacity to handle more than 30 million customers a year.

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Terminal 3 is used by the majority of the members of the Oneworld airline alliance: American Airlines, Cathay Pacific, Finnair, Iberia, Japan Airlines, Qantas, Royal Jordanian, and SriLankan Airlines. British Airways, which mainly uses Terminal 5, also offers some flights from this terminal.

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Heathrow Airport's Terminal 4 is the base of operations for the remaining members of the SkyTeam alliance. These are China Eastern Airlines, ITA Airways, Kenya Airways, Korean Air, Saudia, TAROM and Vietnam Airlines. Meanwhile, oneworld's Malaysia Airlines, Royal Air Maroc and Qatar Airways are also present.

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