Chiltern Railways 631U23
View line Chiltern Railways
Alerts for train 631U23
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
76%
16/21 runs under 3 min
RT coverage: 21 full ยท 0 partial ยท 0 no data
On-time ยท 90 days
81%
50/62 runs under 3 min
RT coverage: 62 full ยท 0 partial ยท 0 no data
Typical delay
โ1min
Median at arrival, 90 days
30 days: โ1 min
P90
+4min
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)
- 3โ10 min
- 10โ30 min
- 30+ min
- Partial coverage
- No data
Worst days
- Wed 12 Aug Max en route +27 min ยท last fix heading to 69416 +21 min
- Thu 17 Sept Max en route +12 min ยท last fix heading to 69416 +12 min
- Wed 19 Aug Max en route +17 min ยท last fix heading to 69416 +10 min
- Mon 19 Oct Max en route +10 min ยท last fix heading to Haddenham & Thame Parkway +6 min
- Thu 15 Oct Max en route +6 min ยท last fix heading to Haddenham & Thame Parkway +5 min
Distribution ยท 90 days
62 runs with a known final delay. On time = under 3 min, the same cut the map uses.
- Early 2% ยท 1
- On time 79% ยท 49
- 3โ10 min 15% ยท 9
- 10โ30 min 5% ยท 3
- 30+ min 0% ยท 0
On-time by weekday
- 77% M n=13
- 92% T n=12
- 69% W n=13
- 83% T n=12
- 83% F n=12
- โ S n=0
- โ S n=0
Recent runs
| Date | Last stop | Final | Max |
|---|---|---|---|
| Thu 22 Oct | Haddenham & Thame Parkway 11:55 | โ1 min | +1 min |
| Wed 21 Oct | Haddenham & Thame Parkway 11:55 | โ1 min | โ |
| Tue 20 Oct | Haddenham & Thame Parkway 11:55 | โ1 min | +1 min |
| Mon 19 Oct | Haddenham & Thame Parkway 12:02 | +6 min | +10 min |
| Fri 16 Oct | Haddenham & Thame Parkway 11:59 | +3 min | +3 min |
| Thu 15 Oct | Haddenham & Thame Parkway 12:02 | +5 min | +6 min |
| Wed 14 Oct | Haddenham & Thame Parkway 11:55 | โ1 min | +1 min |
| Tue 13 Oct | Haddenham & Thame Parkway 11:56 | 0 min | +1 min |
| Mon 12 Oct | Haddenham & Thame Parkway 11:55 | โ1 min | +1 min |
| Fri 9 Oct | Haddenham & Thame Parkway 11:55 | โ1 min | +2 min |
| Thu 8 Oct | Haddenham & Thame Parkway 11:55 | โ1 min | โ |
| Wed 7 Oct | Haddenham & Thame Parkway 11:55 | โ1 min | โ |
| Tue 6 Oct | Haddenham & Thame Parkway 11:59 | +3 min | +8 min |
| Mon 5 Oct | 74561 11:55 | โ1 min | โ |
| Fri 2 Oct | 69416 11:55 | โ2 min | โ |
| Thu 1 Oct | 69416 11:55 | โ1 min | โ |
| Wed 30 Sept | 69416 11:55 | โ1 min | +1 min |
| Tue 29 Sept | 69416 11:57 | +1 min | +2 min |
| Mon 28 Sept | 69416 11:55 | โ1 min | +1 min |
| Fri 25 Sept | 69416 12:00 | +4 min | +7 min |
| Thu 24 Sept | 69416 11:56 | 0 min | +5 min |
| Wed 23 Sept | 69416 11:57 | +1 min | +2 min |
| Mon 21 Sept | 69416 11:55 | โ1 min | โ |
| Fri 18 Sept | 69416 11:54 | โ1 min | โ |
| Thu 17 Sept | 69416 12:08 | +12 min | +12 min |
| Wed 16 Sept | 69416 11:55 | โ1 min | โ |
| Tue 15 Sept | 69416 11:56 | 0 min | +1 min |
| Mon 14 Sept | 62999 10:56 | +4 min | +4 min |
| Fri 11 Sept | 69416 11:55 | โ1 min | โ |
| Thu 10 Sept | 69416 11:55 | 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.