SOF to LHR flight delays
128 flights · January 2025 – August 2026 · UK Civil Aviation Authority
74.8%
Arrived on time
Within 15 minutes of schedule
0.78%
Cancelled
Share of scheduled flights
—
When late, late by
Average across delayed arrivals
11 min
Delay per flight
Averaged over every flight flown
What the record says about this route
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.
Flights from Sofia to London run late more often than the average route, though not severely.
Which airline should you fly on this route?
Over January 2025 – August 2026, British Airways arrived on time most often on SOF to LHR. Flights ran closest to schedule in January and worst in May.
Every airline on SOF to LHR
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 | 128 | 74.8% | 0.78% | — | C |
Month by month
Share of flights that arrived within 15 minutes of schedule, by month flown.
The return leg
LHR to SOF London back to Sofia 76.38% on time CCommon questions
Are flights from Sofia to London usually delayed?
74.8% of flights on the SOF to LHR route arrived within 15 minutes of schedule, so roughly 3 in every ten arrived late. That is about the same as the average route in this record.
Which airlines fly from Sofia to London?
Only British Airways appears in the published record on this route, with 128 flights and 74.8% arriving on time.
How often are SOF to LHR flights cancelled?
0.78% of scheduled flights did not operate — about 8 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 SOF to LHR 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 →