LHR to KUL flight delays
121 flights · January 2025 – August 2026 · UK Civil Aviation Authority
78.15%
Arrived on time
Within 15 minutes of schedule
1.65%
Cancelled
Share of scheduled flights
—
When late, late by
Average across delayed arrivals
18 min
Delay per flight
Averaged over every flight flown
What the record says about this route
The two directions do not behave alike. KUL to LHR arrives on time 8.9 points more often than the outbound. Delay accumulates through the flying day, so whichever direction is scheduled later tends to carry the worse record — which is an argument for booking the morning departure if the choice exists.
Only British Airways flies this route in the published record, so there is no choice to weigh — the route's figures and the airline's are the same figures.
The London to Sepang route sits close to the middle of the record — neither notably punctual nor notably late.
Which airline should you fly on this route?
Over January 2025 – August 2026, British Airways arrived on time most often on LHR to KUL. Flights ran closest to schedule in April and worst in May.
Every airline on LHR to KUL
Ranked by how many flights each one operated. A carrier with fewer than 100 flights in the period is listed but not graded.
| Airline | Flights | On time | Cancelled | Avg delay | Grade |
|---|---|---|---|---|---|
| British Airways | 121 | 78.15% | 1.65% | — | C |
Month by month
Share of flights that arrived within 15 minutes of schedule, by month flown.
The return leg
KUL to LHR Sepang back to London 87.07% on time BOther routes from London
Common questions
Are flights from London to Sepang usually delayed?
78.15% of flights on the LHR to KUL route arrived within 15 minutes of schedule, so roughly 2 in every ten arrived late. That is about the same as the average route in this record.
Which airlines fly from London to Sepang?
Only British Airways appears in the published record on this route, with 121 flights and 78.15% arriving on time.
How often are LHR to KUL flights cancelled?
1.65% of scheduled flights did not operate — about 17 in every thousand. That is in the normal range.
What these figures do and do not tell you
Everything on this page is counted from the flights that actually operated on LHR to KUL during January 2025 – August 2026, as reported by the airlines to the US Bureau of Transportation Statistics. "On time" is the federal definition: arriving at the gate within 15 minutes of the scheduled time.
A route's record is a description of the past, not a forecast. Weather, air traffic control and the aircraft's earlier flights that day drive most delays, and none of them are predictable from a historical rate. What the record does tell you is whether this route runs late more often than others, and which carrier on it has the better history — which is the part you can actually act on when you book.
Cancellations are counted separately from delays because they are a different problem for a traveller: a late flight still gets you there. How the grade is calculated →