Chiltern Railways 661H51
View line Chiltern Railways
Alerts for train 661H51
Alerts are saved per line, not per trip id, so they keep working when the operator changes the timetable. This train runs on line Chiltern Railways.
The mini-map returns when the train runs
On-time · 30 days
68%
15/22 runs under 3 min
RT coverage: 22 full · 0 partial · 0 no data
On-time · 90 days
71%
45/63 runs under 3 min
RT coverage: 63 full · 0 partial · 0 no data
Typical delay
+1min
Median at arrival, 90 days
30 days: +2 min
P90
+8min
9 in 10 runs arrive with less than this
30 days: +4 min
Last 30 days
Delay at the end of each run, in minutes. One bar per run.
- On time (<3 min)
- 3–10 min
- 10–30 min
- 30+ min
- Partial coverage
- No data
Worst days
- Thu 20 Aug Max en route +27 min · last fix heading to 63018 +27 min
- Fri 31 Jul Max en route +28 min · last fix heading to 63018 +24 min
- Wed 29 Jul Max en route +23 min · last fix heading to 63018 +23 min
- Fri 9 Oct Max en route +16 min · last fix heading to Wembley Stadium +16 min
- Fri 28 Aug Max en route +23 min · last fix heading to 63018 +14 min
Distribution · 90 days
63 runs with a known final delay. On time = under 3 min, the same cut the map uses.
- Early 0% · 0
- On time 71% · 45
- 3–10 min 19% · 12
- 10–30 min 10% · 6
- 30+ min 0% · 0
On-time by weekday
- 92% M n=13
- 62% T n=13
- 85% W n=13
- 75% T n=12
- 42% F n=12
- — S n=0
- — S n=0
Recent runs
| Date | Last stop | Final | Max |
|---|---|---|---|
| Fri 16 Oct | Wembley Stadium 16:26 | 0 min | +3 min |
| Thu 15 Oct | Wembley Stadium 16:28 | +1 min | +2 min |
| Wed 14 Oct | Wembley Stadium 16:28 | +2 min | +3 min |
| Tue 13 Oct | Wembley Stadium 16:30 | +4 min | +4 min |
| Mon 12 Oct | Wembley Stadium 16:29 | +2 min | +3 min |
| Fri 9 Oct | Wembley Stadium 16:43 | +16 min | +16 min |
| Thu 8 Oct | Wembley Stadium 16:27 | 0 min | +2 min |
| Wed 7 Oct | Wembley Stadium 16:30 | +4 min | +4 min |
| Tue 6 Oct | Wembley Stadium 16:40 | +6 min | +8 min |
| Mon 5 Oct | Wembley Stadium 16:22 | +2 min | +3 min |
| Fri 2 Oct | 63018 16:31 | +4 min | +4 min |
| Thu 1 Oct | 63018 16:28 | +1 min | +3 min |
| Wed 30 Sept | 63018 16:28 | +1 min | +3 min |
| Tue 29 Sept | 74561 15:28 | 0 min | — |
| Mon 28 Sept | 63018 16:29 | +2 min | +4 min |
| Fri 25 Sept | 63018 16:29 | +1 min | +3 min |
| Thu 24 Sept | 63018 16:29 | +3 min | +4 min |
| Wed 23 Sept | 63018 16:28 | +2 min | +3 min |
| Tue 22 Sept | 63018 16:28 | +2 min | +3 min |
| Mon 21 Sept | 63018 16:28 | +1 min | +3 min |
| Fri 18 Sept | 63018 16:31 | +4 min | +10 min |
| Thu 17 Sept | 63018 16:28 | +2 min | +3 min |
| Wed 16 Sept | 63018 16:27 | +1 min | +3 min |
| Tue 15 Sept | 63018 16:30 | +4 min | +4 min |
| Mon 14 Sept | 63018 16:28 | +1 min | +5 min |
| Fri 11 Sept | 63018 16:30 | +3 min | +3 min |
| Thu 10 Sept | 63018 16:28 | +2 min | +3 min |
| Wed 9 Sept | 63018 16:34 | 0 min | +3 min |
| Tue 8 Sept | 63018 16:27 | +1 min | +3 min |
| Mon 7 Sept | 63018 16:30 | +4 min | +4 min |
Each run is closed into train_runs (country, train number, service day) from the live positions. Final delay = last delay seen. Partial coverage: the feed stopped before the final stop (last value used, hatched in the chart). No data: a run without any valid delay; counts as neither on time nor late. Data collected since 11 July 2026.