LHR to BRU flight delays
3,284 flights · March 2025 – August 2026 · UK Civil Aviation Authority
66.19%
Arrived on time
Within 15 minutes of schedule
2.56%
Cancelled
Share of scheduled flights
—
When late, late by
Average across delayed arrivals
15 min
Delay per flight
Averaged over every flight flown
What the record says about this route
Which airline you fly changes the odds here. British Airways arrived on time 24.2 points more often than Brussels Airlines over the same period on the same route — same airports, same weather, same air traffic control. A gap that survives all of that is about how the two airlines are run.
The season swings this route hard. In February it ran 37 points more punctual than in September — a difference bigger than the one between the best and worst airlines on most routes. If the date is flexible, it is worth more than the carrier.
Cancellation, not delay, is the risk worth pricing here: 2.56% of scheduled flights never operated. A late flight still gets you there. A cancelled one leaves you rebooking, and on a route with few daily departures that can mean losing a day.
This route does worse than its own airport. LHR as a whole runs 10.8 points more punctual than these flights, which points at something specific to the route — the time of day it is scheduled, or the aircraft that feed it — rather than the airport.
Which airline should you fly on this route?
Over March 2025 – August 2026, British Airways arrived on time most often on LHR to BRU. Brussels Airlines was late most often. Flights ran closest to schedule in February and worst in September.
Every airline on LHR to BRU
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 | 1,718 | 77.81% | 3.2% | — | C |
| Brussels Airlines | 1,566 | 53.61% | 1.85% | — | F |
Month by month
Share of flights that arrived within 15 minutes of schedule, by month flown.
The return leg
BRU to LHR Zaventem back to London 72.6% on time DOther routes from London
Common questions
Are flights from London to Zaventem usually delayed?
66.19% of flights on the LHR to BRU route arrived within 15 minutes of schedule, so roughly 3 in every ten arrived late. That is worse than the average route in this record.
Which airline is most on time from London to Zaventem?
British Airways, at 77.81% on time across 1,718 flights. The least punctual on the route was Brussels Airlines at 53.61%.
How often are LHR to BRU flights cancelled?
2.56% of scheduled flights did not operate — about 26 in every thousand. That is high enough that cancellation, not delay, is the risk worth planning around.
What is the best month to fly London to Zaventem?
February, when 85.7% of flights arrived on time. The worst was September at 48.7%.
What these figures do and do not tell you
Everything on this page is counted from the flights that actually operated on LHR to BRU during March 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 →