Chiltern Railways 631U51
View line Chiltern Railways
Alerts for train 631U51
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 ยท 30 days
75%
3/4 runs under 3 min
RT coverage: 4 full ยท 0 partial ยท 0 no data
On-time ยท 90 days
83%
10/12 runs under 3 min
RT coverage: 12 full ยท 0 partial ยท 0 no data
Typical delay
โ1min
Median at arrival, 90 days
P90
+5min
9 in 10 runs arrive with less than this
Last 30 days
Delay at the end of each run, in minutes. One bar per run.
- On time (<3 min)
- 3โ10 min
- 10โ30 min
- 30+ min
- Partial coverage
- No data
Worst days
- Sat 25 Jul Max en route +15 min ยท last fix heading to 69440 +11 min
- Sat 10 Oct Max en route +5 min ยท last fix heading to Haddenham & Thame Parkway +5 min
Distribution ยท 90 days
12 runs with a known final delay. On time = under 3 min, the same cut the map uses.
- Early 33% ยท 4
- On time 50% ยท 6
- 3โ10 min 8% ยท 1
- 10โ30 min 8% ยท 1
- 30+ min 0% ยท 0
On-time by weekday
- โ M n=0
- โ T n=0
- โ W n=0
- โ T n=0
- โ F n=0
- 83% S n=12
- โ S n=0
Recent runs
| Date | Last stop | Final | Max |
|---|---|---|---|
| Sat 10 Oct | Haddenham & Thame Parkway 19:15 | +5 min | +5 min |
| Sat 3 Oct | 69440 19:06 | โ3 min | +1 min |
| Sat 26 Sept | 69440 19:08 | โ1 min | โ |
| Sat 19 Sept | 69440 19:07 | โ2 min | +1 min |
| Sat 5 Sept | 69440 19:11 | +2 min | +2 min |
| Sat 29 Aug | 69440 19:06 | โ3 min | +1 min |
| Sat 22 Aug | 69440 19:06 | โ3 min | +1 min |
| Sat 15 Aug | 69440 19:08 | โ1 min | +2 min |
| Sat 8 Aug | 69440 19:10 | +1 min | +1 min |
| Sat 1 Aug | 69440 19:08 | โ1 min | +2 min |
| Sat 25 Jul | 69440 19:20 | +11 min | +15 min |
| Sat 18 Jul | 69440 19:29 | โ1 min | โ |
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.