Island Line

Island Line is one of the smaller operators in this archive — 5,598 recorded services from 6 Aug 2026 to 7 Nov 2026, around 60 a day — and it ran 99% of them to within five minutes, ahead of the national figure.

3,381 arrivals were recorded across the window, 3,334 of them within five minutes and 14 more than half an hour late. At this volume a single badly delayed working is worth a visible fraction of a percentage point.

Its week is strongly peaked: 138 services on Friday, 6 November 2026 against 44 on Sunday, 11 October 2026, a swing of 3.1 times.

The average delay at destination was 0.1 minutes. The worst single arrival recorded was 1h 25m behind schedule, Ryde Pier Head to Shanklin on Thursday, 3 September 2026.

The day-to-day spread is wide — 29 points between its best day, Thursday, 29 October 2026 at 100%, and its worst, Thursday, 3 September 2026 at 71%.

76 services were cancelled, 1.4% of everything booked — below the 2.3% the network cancelled over the same dates. The worst single day was Friday, 4 September 2026, at 94% of that day's timetable.

Counting those cancellations as failures, the way the industry's own measure does, takes the on-time share from 99% of recorded arrivals to 96% of everything booked whose outcome is known — 2.2 points.

Ranked on on-time share of recorded arrivals against the 34 operators with enough of them to compare, Island Line comes first.

Island Line in numbers

Every percentage among the bands is of the 3,381 services whose arrival reached the archive, not of all 5,598, and the bands are exclusive. 2,141 ran without an arrival being recorded, and nothing is claimed about those. The row counting cancellations is those same 3,334 on-time arrivals over a denominator that also holds the 76 trains that did not run at all. Delay is judged at the destination, a stricter test than the industry's own measure and not comparable with it. The on-time share and the average delay answer different questions.

Day by day

94 archived days, 6 Aug 2026 to 7 Nov 2026, widest bar the busiest, filled to the share that arrived within five minutes. The same days across every operator.

In the daily longest-delay league

Island Line appears 8 times across 94 archived days, on 4 separate dates in the ten shown. These are appearances in the daily league, not this operator's own worst delays.

Recorded live from the Darwin and TRUST feeds on each of the 94 days above, and aggregated here. IL is this operator's ATOC code. How these figures are measured · All operators · Sources and licences