Chiltern Railways

Chiltern Railways is one of the smaller operators in this archive — 29,449 recorded services from 6 Aug 2026 to 7 Nov 2026, around 313 a day — and it ran 92% of them to within five minutes, ahead of the national figure.

23,977 arrivals were recorded across the window, 22,104 of them within five minutes and 132 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: 366 services on Wednesday, 9 September 2026 against 193 on Sunday, 11 October 2026, a swing of 1.9 times.

The average delay at destination was 1.2 minutes. The worst single arrival recorded was 2h 36m behind schedule, High Wycombe to London Marylebone on Thursday, 5 November 2026.

The day-to-day spread is wide — 25 points between its best day, Wednesday, 16 September 2026 at 99%, and its worst, Friday, 28 August 2026 at 74%.

1,952 services were cancelled, 6.6% of everything booked — above the 2.3% the network cancelled over the same dates. The worst single day was Saturday, 29 August 2026, at 19% of that day's timetable.

Counting those cancellations as failures, the way the industry's own measure does, takes the on-time share from 92% of recorded arrivals to 85% of everything booked whose outcome is known — 6.9 points.

Ranked on on-time share of recorded arrivals against the 34 operators with enough of them to compare, Chiltern Railways comes tenth.

Chiltern Railways in numbers

Every percentage among the bands is of the 23,977 services whose arrival reached the archive, not of all 29,449, and the bands are exclusive. 3,520 ran without an arrival being recorded, and nothing is claimed about those. The row counting cancellations is those same 22,104 on-time arrivals over a denominator that also holds the 1,952 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

Chiltern Railways appears 13 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. CH is this operator's ATOC code. How these figures are measured · All operators · Sources and licences