Is 2 hours enough at Heathrow?

So 2 hours should be ok - unless you run into really long lines at the connection center. Also no passport control and no customs. A second option is: immigration / customs in T1, walk through the tunnel to T3, security at T3.



Whether 2 hours is enough at Heathrow depends entirely on the context of your visit. For a check-in/departure, 2 hours is generally considered insufficient and very risky in 2026. Most airlines and Heathrow Airport itself recommend arriving at least 3 hours before international flights. This is due to the time required for bag drop queues, the new security scanning procedures, and the often-long walks to remote "satellite" gates (like the C-gates in Terminal 5). For a layover/connection, 2 hours is usually enough only if you are on a "through-ticket" where your bags are checked to your final destination and you stay "airside" (within the terminal). If you need to change terminals (e.g., from T2 to T5) or pass through Border Control to collect bags and re-check them, 2 hours is almost certainly not enough time, especially since many travelers now require an Electronic Travel Authorisation (ETA) to enter the UK, which can add complexity to the transit process.

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For international layover flights booked on one airline, two hours is often recommended to make your connection. For international flights on different airlines, the connection time will need to be even greater as you may have to change terminals between the two flights.

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We recommend that you allow the following times when connecting between terminals: Within Terminal 3: 60 minutes. Between Terminal 3 and Terminal 5: 90 minutes. Within Terminal 5 (UK domestic and international flights): 60 minutes.

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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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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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Brittraveller: As far as I'm aware Sunday is almost always the busiest day of the week at Heathrow, particularly in summer.

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How long does it take to clear customs at Heathrow? On average, it takes between 30 minutes and 1 hour to clear customs and immigration at Heathrow Airport.

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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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How long does it take to clear customs at Heathrow? On average, it takes between 30 minutes and 1 hour to clear customs and immigration at Heathrow Airport.

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Mayers recommends two hours as a standard buffer between flights to be safe. This gives you a cushion in case things go wrong during your journey. You'll definitely want at least a two-hour window if you've booked a “hacker fare,” as opposed to flying with the same airline your entire trip.

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If your itinerary was purchased as one ticket (as in: you have only one itinerary and one confirmation number), and the connection time was too short and you miss the second (or third) flight, you can rest easy, no matter what happens. The airline will simply put you onto the next available flight, free of charge.

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If a delay in your first flight is the reason you're missing your connection, don't worry too much. Usually, most airlines will rebook you on the next flight, and that too for free. Although, you might have to fly on standby depending on seat availability.

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Terminal 5, home of British Airways, has been named 'World's Best Airport Terminal' six times in its 11-year history.

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90 min isn't enough time. For Heathrow, I would recommend a minimum of 2 hours and even that makes me nervous. As for which terminal you will go in and out of, I suggest plugging the flight number into Flight Aware. It gives you the most recent flights and where the arrived/depart.

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So that airline suggests that 90 minutes will work, but don't delay getting off the plane, thru immigration/passport control, then thru security, and on to the other terminal. Again, look for an airport official if you need help.

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Travel advisers say there's a lot to take into account when booking connecting flights, but a general rule of thumb is 60-90 minutes between domestic flights and at least two to three hours for international itineraries.

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Airlines. As of 2023 British Airways was the only airline to use Terminal 5, operating the majority of its flights from Heathrow there, with some short-haul destinations served from Terminal 3 due to T5 capacity restrictions.

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