If you are arriving/departing from the same terminal then 60 minutes is the minimum connection time, a change of terminals has a minimum connection time of 90 minutes. Since it's one ticket and your luggage will be booked straight through the question is whether you have to change terminals or not.

An hour is the absolute minimum connection time at London Heathrow, but it is generally not enough time for a stress-free transfer, especially in 2026. If your connection is within the same terminal (e.g., Terminal 5 to Terminal 5), it is "doable" if your first flight arrives early and you are a fast walker. However, if you must change terminals (e.g., Terminal 2 to Terminal 5), you have to take an airside bus, which can take 20 minutes alone, followed by a mandatory security re-screening. Most travel experts recommend a minimum of 90 to 120 minutes at Heathrow. If you are on a single ticket, the airline is responsible for rebooking you if you miss the connection, but if you are "self-connecting" on separate tickets, an hour is almost a guaranteed recipe for a missed flight. Always factor in potential "stacking" delays while landing at LHR.

No, an hour is generally not enough time for a transfer at Heathrow, especially if it involves changing terminals or airlines.

Here’s a detailed breakdown of why it’s risky and what factors determine if it’s even possible:

Key Reasons Why 1 Hour Is Insufficient:

1. Terminal Changes: Heathrow has four passenger terminals (2, 3, 4, 5). Transferring between them is time-consuming.

   • Landside Transfer (Worst Case): If your flights are on separate tickets or with unallied airlines, you must collect baggage, clear immigration, change terminals (via bus/taxi), re-check bags, and re-clear security. This is impossible in 1 hour.
   • Airside Transfer (Best Case): If both flights are on a single ticket with partner airlines and in the same terminal alliance, you may stay “airside.” However, moving between some terminals (e.g., T5 to T3) still requires taking the Heathrow Express train and re-clearing security. This is very tight and leaves no room for delay.

2. Security & Immigration: Even for airside transfers, you will almost always have to pass through a security checkpoint. Lines can be very long and unpredictable. If you arrive from outside the UK, you may also need to clear passport control as part of the transfer process.

3. Airport Size: Heathrow is massive. Your arrival gate could be a 15-20 minute walk from your departure gate, even within the same terminal.

4. No Room for Delay: Your incoming flight could be late by 15-20 minutes, which is common. With