
If you're transiting through Heathrow Airport, you may be able to exit the airport during your layover. However, there are a few things to keep in mind. First, make sure you have the necessary documentation, such as a visa or electronic travel authorisation (ETA), as required by the UK government. Depending on your specific situation, you may need a passport, boarding pass, or other proof of onward travel. Additionally, allow enough time for security checks and consider the time needed to travel to and from your destination outside the airport. Some sources suggest allowing at least 90 minutes to get landside and returning to the airport at least one to three hours before your flight. It's also important to note that some airlines or terminals may have specific rules or restrictions, so it's always a good idea to check with the relevant authorities beforehand.
| Characteristics | Values |
|---|---|
| Possibility of leaving the airport during transit | Travellers are generally allowed to exit the airport during transit. However, some passengers have reported being denied exit during a layover at Heathrow Airport. |
| Requirements for exiting the airport | Passport, boarding pass, and proof of ongoing flight. Some sources mention the need for a visa and a landing card. |
| Time considerations | Allow up to 90 minutes to get landside and aim to be back at the airport at least 1-2 hours before the onward flight. |
| Baggage considerations | If you have checked baggage, you may need to collect it and check it in again when you return to the airport. |
| Transit between terminals | Terminal 5 at Heathrow Airport has separate buildings for gates A, B, and C, which are connected by a transit train. It takes approximately 20 minutes to get between these gates. |
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What You'll Learn

Border control and layovers
Border control procedures during layovers can vary depending on the countries involved and the nature of the layover. Here are some key things to know about border control and layovers:
Firstly, it's important to understand the difference between "airside" and "landside" layovers. During an airside layover, you do not pass through border control before your connecting journey, while during a landside layover, you pass through border control but must return through it to continue your journey, typically within 24 hours.
When travelling internationally, you will usually need to go through customs and immigration at your layover destination. This involves presenting your passport, and sometimes collecting and rechecking your luggage. However, this is not always necessary for domestic flights within a country or specific region. For example, if you are travelling within the Schengen Zone in Europe, you do not need to go through customs when travelling between member countries.
If your layover involves a longer stay, such as an overnight stay, you may need to go through additional border control procedures. In some cases, you may even be allowed to leave the airport and explore the city you are laying over in. However, this may require clearing immigration and customs before exiting the airport.
It's important to note that layover procedures can vary depending on the specific airport and your individual circumstances. Therefore, it is always a good idea to check with the relevant authorities or your airline beforehand to understand the specific requirements for your layover. Additionally, when booking flights with layovers, it is recommended to allow for sufficient time between your arrival and your next departure, especially if you need to collect a new boarding pass.
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Transit between terminals
Heathrow Airport has four main terminal buildings, with sub-buildings within those terminals. Most connections are within the same building, but some passengers will need to change terminals.
If you are connecting within the same terminal, you can go on foot or catch a free tram. If you are connecting from one terminal to another, you can catch a free shuttle bus that operates every 10 minutes. If you are connecting from international to domestic, you will need to go through biometrics before reaching security. If you are self-connecting, you will be treated as an arrival and departure; you'll need to go through security, collect your baggage, and check back in again.
If you are connecting between flights, normal rules for liquids in hand baggage apply. You may carry duty-free liquids provided they remain sealed with the receipt inside a Security Tamper Evident Bag. If you need to collect any boarding passes, go to a kiosk or customer service desk, then follow the appropriate signs – either International or Domestic – for your flight. Staff will be happy to help with any queries you may have in the connections area. If you're connecting to a UK domestic or Republic of Ireland flight, you will need to present your passport at Passport Control, then Security will take a facial biometric picture before you go through Security screening.
If you are travelling between Terminals 2, 3, 4, and 5, you can use the shuttle train, which offers free transfers within the airport. To reach Terminal 5C, you can ride the train from the main building or use the underground passageway with moving walkways; both are between gates A14 and A15 in the main terminal building and take around 15 minutes. Terminal 5 itself consists of the main terminal building and two satellite terminals, 5B and 5C, connected by a walkway or transit train.
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Liquid duty-free rules
When travelling through Heathrow Airport, it is important to be aware of the rules regarding duty-free liquids. These rules can vary depending on your point of origin and destination, as well as the specific regulations of the airport itself. Here is a guide to help you navigate the liquid duty-free rules when passing through Heathrow Airport.
Firstly, it is important to understand the general restrictions on liquids for hand luggage. At Heathrow Airport, liquids, aerosols, gels, and pastes are permitted in hand luggage, but they must be in containers no larger than 100ml. These containers must be placed in a transparent, resealable plastic bag with a capacity no greater than 1 litre. This bag should be removed from your cabin baggage and placed separately in a tray for security screening.
Now, let's discuss the duty-free rules for liquids. If you are travelling from a non-EU country to an EU country via Heathrow (for example, Moscow to London to Paris), any duty-free liquids you purchase at your initial departure point must be placed in a sealed bag. However, it is important to note that these liquids may be confiscated when you reach Heathrow, in accordance with EU regulations. To avoid disappointment, it is recommended to refrain from purchasing duty-free liquids if you have a connecting flight to an EU destination.
On the other hand, if you are travelling from an EU country to a non-EU country via Heathrow, you are permitted to bring duty-free liquids in a sealed bag through the airport. Make sure that the bag is properly sealed and that the receipt is clearly visible inside the bag, with no signs of tampering. It is also important that the seal is from an airport approved for sealing and not a fake seal.
Additionally, Heathrow Airport offers a convenient Shop and Collect service. This service allows you to purchase duty-free items, such as cosmetics, fragrances, spirits, and fine wines, and have them stored securely at the airport until your return. This way, you can take advantage of the duty-free prices without having to carry your purchases during your trip.
Lastly, it is important to stay updated with any changes in regulations, especially after Brexit. While you are still allowed to bring a generous amount of goods into the UK without paying extra tax, there may be new rules and allowances that you need to be aware of. Always check the most recent guidelines before your travel to ensure a smooth and worry-free experience.
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Visiting relatives
If you are connecting flights at Heathrow Airport and want to visit relatives, you can leave the airport during your layover. However, you will need to pass through UK immigration, so you will need the right to enter the UK, such as a visa or passport. If you are arriving on an international flight and connecting to a domestic flight, you will need to go through immigration. Passengers transferring from an international to a UK or Republic of Ireland flight will have a biometric image taken of their face.
To pass through immigration, you will need to fill out a landing card, which can be obtained on the plane or in the immigration hall. You will need to present this to the immigration official, and you should write "In Transit" and explain your plans. You will also need to provide your passport and boarding pass when re-entering the airport. It is recommended that you allow plenty of time to pass through security and re-check any baggage. Most airlines will provide connecting passengers with all their boarding passes when they check in for their first flight. However, if you have booked two separate flights, you will likely need to collect and re-check your baggage.
If your relatives are driving you back to Heathrow, it is recommended that they plan to arrive at the airport 2.5 hours before your onward flight, or 3 hours if you need to check baggage. If they live close to Heathrow, this can be reduced to 2 hours, but ensure you are in the security line 90 minutes before your flight.
Heathrow Airport is well-connected to the city of London, with numerous transport options available. The Heathrow Express offers a direct service to downtown London in just 15 minutes, although it is more expensive than the tube. The tube provides a cheaper alternative, but it may involve delays and multiple stops.
Overall, with the necessary documentation and sufficient time, you can leave Heathrow Airport during your layover to visit your relatives and still make your connecting flight.
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Passport and boarding pass requirements
If you're transiting through Heathrow Airport and want to leave the airport during your layover, you'll need to ensure you have the right passport and boarding pass requirements in place. Here are the key points to keep in mind:
Passport Requirements:
- Ensure your passport is valid and meets the entry requirements for the UK. Your passport must be biometric if you are over the age of 10.
- Check if you need a visa or an Electronic Travel Authorisation (ETA). If you're passing through UK border control, you may need a Visitor in Transit visa or an ETA, depending on your nationality and the length of your layover. From 16 January 2025, passengers transiting airside without passing through UK border control are exempt from needing an ETA.
- Have your passport ready when passing through security and immigration. You may be asked to show your passport and other travel documents at various points during your connection.
Boarding Pass Requirements:
- Most airlines provide connecting passengers with all their boarding passes when they check in for their first flight. However, if you don't have your boarding pass for your next flight, you can pass through security with your itinerary.
- It is recommended to have your boarding pass ready when returning to the airport after your layover. You will need to pass through security as a normal departing passenger, so ensure you have your boarding pass and passport readily available.
- If you need to print or obtain your boarding pass, you can do so at your airline desk or at one of the self-service machines located in the airline check-in areas.
Please note that leaving the airport during a layover may require additional time for immigration and security processes. It is generally recommended that passengers with long layovers do not leave the airport to ensure they do not miss their connecting flights.
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Frequently asked questions
Yes, you can leave the airport during a layover, but you should allow enough time to get landside and then get back to the airport. You will need your passport and a boarding pass for your next flight to get through security.
It is recommended that you allow up to 90 minutes to get landside and then aim to be back at the airport with at least 1-2 hours to spare, as there is a cut-off time to clear outbound security.
To re-enter the airport, you will need your passport and your boarding pass for your next flight. You will also need to fill out a landing card, which you can get on the plane or in the immigration hall.
If you miss your connecting flight, go to the British Airways Customer Service desk in the Flight Connections area to rebook.



































