Is a 40 min layover in London long enough?
LHR · Heathrow · London, United Kingdom
Cutting It Close
Terminal 5's size alone (satellite gates require an internal train) makes 40 minutes too tight.
Quick Stats
4
35m
20m
British Airways
Minimum Connection Times
45min
✗60min
✗60min
✗75min
✗AD PLACEMENT — CONTEXTUAL
Tips for 40 min Connections
If your itinerary is entirely on British Airways within Terminal 5, connections can be genuinely fast since it's a single, well-organized building.
Any connection involving Terminal 4 should be given extra buffer, as it's physically distant and served only by rail or bus shuttle.
Check whether your transfer is 'airside' (no immigration) or requires exiting to landside — Heathrow's transfer routing varies by airline alliance and terminal pairing.
Security queues can be unpredictable at peak times (early morning and evening banks), so don't assume the posted MCT accounts for a bad day.
Use the free inter-terminal transit trains rather than walking whenever offered — distances between T5 and the central terminals are much longer than they look on the map.
Busyness — Connection Risk
12a6a12p6p12a
Low risk
Moderate
High risk
Tight connections are safer outside peak hours. Morning rush (6–9a), midday (11a–2p), and evening (4–8p) are highest risk.
Getting Between Concourses
Terminal 2 and Terminal 3 are adjacent and connected by a covered walkway (10-15 minutes on foot). Terminal 5 is linked to the central area by a dedicated driverless transit train (Heathrow Express-style pod), while Terminal 4 is the most remote and requires either the Heathrow Express/Elizabeth line rail link or an inter-terminal bus, both of which involve exiting to landside transfer areas and passing through security again at the new terminal.
Is 40 minutes enough for a layover at LHR?
Terminal 5's size alone (satellite gates require an internal train) makes 40 minutes too tight.
Other Layover Durations at LHR
AD PLACEMENT — BEFORE FOOTER