Can you walk from Terminal 3 to 4 Heathrow?

Terminal 4 (T4) is located at the south end of the airport and is not connected to another terminal with any direct walkways. Passengers must travel from T4 to other terminals via the airside connection bus or outside of the secure area by train or bus.



No, you cannot walk between Terminal 3 and Terminal 4 at London Heathrow Airport (LHR). These terminals are located on different sides of the airfield; Terminals 2 and 3 are in the "Central Terminal Area," while Terminal 4 is located to the south. To travel between them in 2026, you must use the free shuttle trains (the Elizabeth Line or Heathrow Express) or the underground (Piccadilly Line). The journey takes approximately 15 to 20 minutes including waiting time. If you are a "landside" passenger, you must tap an Oyster or Contactless card at the gates, but as long as you are traveling only between Heathrow terminals, no fare is charged. If you are an "airside" passenger (connecting between flights without clearing customs), you must follow the purple "Flight Connections" signs and take a dedicated shuttle bus that drives across the tarmac. Always allow at least 30 to 45 minutes for this transfer to account for security checks and transit intervals, especially during the busy 2026 summer travel season.

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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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CONNECTING FLIGHTS
If your baggage is checked through to your final destination, that's where you clear customs. If you're collecting your baggage and checking in to your next flight yourself, you need to pass through customs at Heathrow.

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Use the eGates for quicker entry a national of an EU country, Australia, Canada, Iceland, Japan, Liechtenstein, New Zealand, Norway, Singapore, South Korea, Switzerland or the USA.

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We recommend that you allow at least 3 hours if you're connecting between these airports. Your baggage will not be automatically forwarded, so please collect all your bags before leaving Heathrow or Gatwick airport.

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Customs and immigration are usually required at the connecting airport for international flights. You don't always have to for domestic flights. In most cases, passengers on layover flights must clear customs and immigration at the first point of entry.

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You do not have to pick up your bags if they have been labelled for your next flight. If you need to collect a boarding pass, please follow the purple signs for Flight Connections and visit the Airline Desks to pick up your boarding pass.

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Terminal 4 is located on the south side of the airport, and can be reached from Terminals 1, 2 & 3 via the free inter-terminal transfer service on the Heathrow Express train, which takes approximately eight minutes.

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Heathrow Express trains stop at Heathrow Terminals 2 & 3 and Heathrow Terminal 5. Passengers travelling to Terminal 4 should change on to the free transfer train at Heathrow Terminals 2 & 3 (connecting trains every 15 minutes, journey time four minutes).

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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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The rule of thumb is that you leave AT LEAST 3 hours from arrival to departure for international flights and 1.5 hours for domestic. You still have to get your bags, clear customs, re-check your bags and then go through security for your next flight. All of this can take a couple of hours.

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Is 2 hours enough time for international flight from UK? The Heathrow website also currently urges: 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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By the end of 2024, people who do not need a visa to enter the United Kingdom will need to have an electronic travel authorisation, or ETA, before they visit. These 'non-visa nationals', including EU and US citizens, can currently travel to the UK without a visa if visiting for up to six months.

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Not only is the concept of precheck rarely to never seen outside the States, it's not in use at UK airports, period. Precheck can (stress that word) make a small difference at the airports that have preclearance for US flights but that is very, very hit or miss.

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The fastest way to pass immigration quickly is to use the electronic gates wherever possible. I recently passed through Terminal 5 in less than two minutes this way. U.S. passport holders have been able to use U.K. ePassport gates at major U.K. airports including all London Heathrow terminals since 2019.

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