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Heathrow Connection Times 2026: Terminal Transfers and Real Minimums
Heathrow connection times by terminal: the official 60- and 90-minute minimums, realistic buffers, and when an hour at LHR is not enough.
Heathrow's official minimum connection time is 60 minutes within one terminal and 90 minutes between terminals. Those numbers are legal for booking, but they assume nothing goes wrong. In practice, as of October 2026, aim for 90 minutes within a terminal, 2 hours between terminals, and 3 hours if you are on separate tickets or have to collect your bags.
The official minimums vs what actually works
A minimum connection time (MCT) is the shortest gap an airline is allowed to sell between two flights on one ticket. It is a planning floor based on a typical day, not a promise that you will make it.
| Your connection | Official minimum | Realistic minimum |
|---|---|---|
| Same terminal, one ticket | 60 minutes | 90 minutes |
| Different terminals, one ticket | 90 minutes | 2 hours |
| Separate tickets, or bags must be collected | No minimum applies | 3 hours |
These figures are as of October 2026. Heathrow changes procedures from time to time, so confirm on heathrow.com and in your airline's app before you book a tight connection.
Why 60 minutes so often isn't enough
The clock starts when your plane is scheduled to arrive at the gate. It does not start when you are standing in the terminal. Several things eat into that hour.
Getting off the plane. On a full wide-body jet, it can take 15 minutes or more to reach the door from a rear seat. Some flights also park at a remote stand, which means a bus to the terminal.
Transfer security. This is the step that catches most people. Every transfer passenger at Heathrow goes through Flight Connections security again. That applies even if you arrive and depart from the same terminal. The usual liquids rules apply, so a bottle of water or duty-free bought on your first flight can be taken off you. Queues of 20 to 45 minutes are normal in the morning and evening rush, which is exactly when many long-haul flights arrive.
The gate closes before departure. Many airlines close boarding gates roughly 15 to 20 minutes before the scheduled departure. Check your airline's own rule. On a 60-minute connection with a gate that closes 20 minutes early, you have 40 minutes from arrival to reach your gate. A 25-minute security queue leaves 15 minutes for everything else.
A late inbound flight. If your first flight lands even 20 minutes late, a 60-minute connection becomes very hard to make. Transatlantic flights in particular are often affected by headwinds and holding patterns over London.
The rule of thumb: an hour is enough only when your first flight is on time, you sit near the front, you carry nothing that will slow you down at security, and you are not arriving during a rush.
Moving between terminals
Heathrow has four working terminals. Terminal 1 is closed. As of October 2026, airlines are grouped roughly like this:
| Terminal | Main airlines |
|---|---|
| Terminal 2 | Star Alliance carriers (United, Lufthansa, Air Canada and others) |
| Terminal 3 | Virgin Atlantic, Delta, and oneworld carriers other than British Airways |
| Terminal 4 | SkyTeam carriers, plus most Gulf and Asian airlines not based in T2 or T3 |
| Terminal 5 | British Airways and Iberia |
How long the transfer takes depends on which terminals you are moving between:
- Terminal 2 to Terminal 3, or the reverse: about a 10-minute walk through a tunnel.
- To or from Terminal 4 or Terminal 5: free transfer trains or buses. Allow 20 to 40 minutes door to door, including the wait.
The 20 to 40 minutes is just the journey. Add the walk off the plane and the transfer security queue on top. That is why a connection between terminals really needs about 2 hours, not the official 90 minutes.
One detail that surprises people: British Airways' main terminal is 5, but some oneworld partners use Terminal 3. A connection that looks like "one airline group" can still mean changing terminals. Check the terminal for each flight separately. Our airport guides cover Heathrow's layout in more detail.
Do you go through UK passport control?
Usually not. Most transfers at Heathrow stay airside, meaning you never officially enter the UK. You only meet UK passport control if one of these applies:
- You change terminals by a landside route (outside the secure area).
- Your bags were not checked through to your final destination.
- You are on separate tickets.
If you are a US citizen connecting through Heathrow on one ticket, you will normally just follow the purple "Flight Connections" signs and never see a border officer. Rules on transit visas depend on your nationality. If you hold a passport that may need one, check through our entry-requirements lookup and the official UK government site.
Separate tickets: a different game entirely
If you booked your two flights separately, for example a cheap transatlantic fare and a separate budget flight onward to Europe, Heathrow treats you as two unrelated passengers.
That means you:
- Clear UK immigration.
- Collect your checked bags.
- Go to the departures area of your next terminal.
- Check in and drop your bags again, before that airline's check-in deadline.
- Go through departure security.
Allow at least 3 hours. More importantly, if your first flight is late and you miss the second, the second airline owes you nothing. It will usually treat you as a no-show. Our guide on missed connections on separate tickets explains who pays and what to do.
On a single ticket, the airline is responsible for getting you to your destination if a delay causes you to miss the connection. If the disruption is the airline's fault, you may also be owed compensation under UK rules, which closely mirror Europe's EU261. Our EU261 guide explains the distance bands and exceptions.
How to give yourself the best chance
Book the longer connection when the fare is the same or close. A 2-hour gap feels wasteful on paper. A missed flight and a night in a Heathrow hotel cost far more time.
Pack for transfer security. Keep liquids in a clear bag and electronics easy to reach. Wear shoes you can take off quickly if asked.
Check both terminals before you fly. Your boarding passes and airline app should show them. Confirm again within 24 hours of departure.
Track your inbound flight. On the day, use our live flight status tool to see whether your first flight is running late and which gate it is due at. If the delay will make the connection impossible, call or message your airline before you land. Rebooking options are better while seats remain.
Move to the front if you can. Ask the cabin crew if there is an empty seat nearer the door for the descent. Some crews will also help passengers with tight connections get off first.
Don't stop for duty-free on the way. Shop once you know where your departure gate is.
Frequently asked questions
Is a 1-hour layover at Heathrow enough?
It can be, if you are staying in the same terminal, your first flight is on time, and you are not arriving during the morning or evening rush. If you are changing terminals or on separate tickets, one hour is not enough.
How long does it take to get from Terminal 3 to Terminal 5?
Allow 20 to 40 minutes for the transfer train or bus, including the wait. Then add transfer security on top. That is why about 2 hours is the realistic minimum for this connection.
Do I need to collect my bags when connecting at Heathrow?
Not on a single ticket. Bags are normally checked through to your final destination. On separate tickets, you must collect them, clear UK immigration and check them in again.
