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I am flying from New York to Nairobi, Kenya, with a layover at Heathrow.

Both flights are on the same itinerary with British Airways (i.e. it was booked as a flight from New York to Nairobi). They are both in terminal 5 at Heathrow. I'm a US citizen, if that's relevant.

What exactly will I have to do during my layover in the UK? Specifically, will I have to:

  • go through customs? immigration?
  • claim checked bags and recheck them?
  • go through security again?
  • anything else? for example, I have heard something about having to go to a "flight connections" counter after I land in London and I'm not allowed to get on the 2nd flight without checking in here

I'm seeing a lot of conflicting information, and am trying to decide if I should pay $84 to pre-select seats at the front of the cabin to get out of the plane quicker/get to the front of any lines. I have a 2 hour layover in Heathrow.

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2 Answers

up vote 7 down vote accepted

British Airways provide a lot of information on T5 on their website, including all about Flight Connections. I'd very much suggest you read through that.

To tackle the main bits, assuming you have a single ticket covering both legs of your journey:

  • You will not pass through UK customs
  • You will not pass through UK immigration
  • Your bags will be checked through to your final BA destination, so won't have to be collected or re-checked. (Check the baggage tags given to you at checkin to ensure they have been tagged all the way through)
  • If your starting airport is able, they'll give you your second boarding pass
  • If not, you'll have to go to the flight connections desk to collect it
  • On arrival, you'll follow the purple Flight Connections signs, and have your boarding pass + passport checked
  • You will have to clear security, which is upstairs from flight connections, before you enter the main departures area of the terminal

As long as there are no flight delays on your inbound, 2 hours will be fine. Queues to get your boarding pass checked before security tend not to be too bad, and while security can be shocking at times, we're talking 30-45 minutes at bad times.

One thing to check when you arrive is what bit of T5 you arrive in, and where you go from. T5 actually has three buildings, linked by an underground shuttle train, T5A (the main bit), T5B and T5C. If you arrive at B or C gates, and depart again from B or C, you can clear flight connections and security there, which is generally a lot quieter. However, if either flight involves the main A gates, you'll have to do security there, which can have delays at busy times.

I've managed to find a CC-BY photo from Terminal 5 Insider which shows what you'd see at T5A: Photo of T5A flight connections, from www.flickr.com/photos/22819720@N02/

This is at the far end of the Purple Flight Connections signs in T5A. To your right are the desks, where you'd go to collect your onward boarding pass if you didn't already have it. To the left is the UK border, which you'd have got to if you'd followed the yellow arrivals signs instead. Straight ahead is where they'll check your passport and scan your onwarding boarding pass, then it's up the escalators in the background to get to security. You need to get your boarding pass scanned by 35 minutes before departure (conformance), so with 2 hours you'll be fine!

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Thank you! This is more information than I ever expected! –  Jer Jan 31 at 18:43
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As both legs of your trip are on the same ticket, your luggage will be checked through to your final destination (NBO). These days you don't have much choice in the matter.

Heathrow offers an online international connections guide, but in general, it is set up for "sterile" connections. It is not necessary for you to be admitted to the United Kingdom, and thus not necessary for you to be processed through immigration. When you debark from your transatlantic leg, there should be signs for Flight Connections, Connecting Passengers, International Transit or some such. Follow these signs to stay airside.

You would then pass through a security screening where your carry-on bags will be examined. You will need to be in compliance with the usual rules about liquids, blades, and so on, so if you filled a water bottle in the terminal in New York, be sure it is empty by the time you reach the screening point.

As you are connecting within the same terminal, two hours should be adequate provided your flight arrives on time and without incident. If you would like more reassurance, you can contact BA to see if they would schedule you on a later connection to NBO.

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Thank you! Unfortunately there's only one flight per day to Nairobi, so if our inbound flight is delayed we'll be stuck in London for a night. –  Jer Jan 31 at 18:48
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