Assuming your flights are into and out of Terminal 5, you should be fine. I find recently into departures takes about 45-60 minutes. Then there is enough time to get to the gate… sometimes they are a bit away.
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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.
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.
The recommended layover time for domestic flights is normally one hour. However, as previously stated, you may require longer if your flights are booked with two different airlines, if you are traveling to a very busy airport or if you require special assistance.
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.
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.
What is a good connection time? 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.
Although some of the terminals are a fair distance apart, Heathrow runs airside transfer buses between terminals for those passengers who have to transfer from one terminal to another. These buses depart every six to 10 minutes.
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.
Overall, passengers usually have to re-clear security for connecting flights, though there may be some exceptions depending on the airport and flight itinerary. To make this process easier, checking with the airline or airport ahead of time is recommended.
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.
You will need to go through passport control (and customs if applicable) and then check in again as normal for your connecting flight, so please ensure you have enough time.
What happens if a flight is delayed and you miss your connection? If you miss your connection due to a delay, usually the airline is responsible for providing you with a replacement flight to your destination. They will have to book you on the earliest possible flight available.
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.
Generally speaking, most airlines will make some kind of efforts to wait for delayed passengers on a connecting flight, though this is not necessarily guaranteed. In some cases, airlines may be able to hold a connecting flight for a period of time, but it is not something that is typically guaranteed by any airline.
Domestic flights - Yes. Keep in mind you will have to go through security again, which may cause you to miss your flight depending on how long your layover is.