Chiltern Railways 631T21
View line Chiltern Railways
Alerts for train 631T21
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
86%
25/29 runs under 3 min
RT coverage: 29 full · 0 partial · 0 no data
On-time · 90 days
83%
71/86 runs under 3 min
RT coverage: 86 full · 0 partial · 0 no data
Typical delay
0min
Median at arrival, 90 days
30 days: 0 min
P90
+6min
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
- Sat 22 Aug Max en route +44 min · last fix heading to 74425 +43 min
- Wed 2 Sept Max en route +36 min · last fix heading to 74425 +36 min
- Mon 20 Jul Max en route +15 min · last fix heading to 74425 +15 min
- Fri 17 Jul Max en route +15 min · last fix heading to 74425 +15 min
- Tue 22 Sept Max en route +17 min · last fix heading to 74425 +13 min
Distribution · 90 days
86 runs with a known final delay. On time = under 3 min, the same cut the map uses.
- Early 2% · 2
- On time 80% · 69
- 3–10 min 9% · 8
- 10–30 min 6% · 5
- 30+ min 2% · 2
On-time by weekday
- 92% M n=12
- 75% T n=12
- 85% W n=13
- 85% T n=13
- 85% F n=13
- 58% S n=12
- 100% S n=11
Recent runs
| Date | Last stop | Final | Max |
|---|---|---|---|
| Mon 12 Oct | Oxford Parkway 11:34 | −2 min | — |
| Sun 11 Oct | Oxford Parkway 11:47 | 0 min | — |
| Sat 10 Oct | Oxford Parkway 11:42 | −1 min | +1 min |
| Fri 9 Oct | Oxford Parkway 11:40 | +4 min | +9 min |
| Thu 8 Oct | Oxford Parkway 11:35 | −1 min | +1 min |
| Wed 7 Oct | Oxford Parkway 11:37 | +1 min | +5 min |
| Tue 6 Oct | Oxford Parkway 11:47 | +12 min | +12 min |
| Mon 5 Oct | 74425 11:35 | −1 min | +1 min |
| Sun 4 Oct | 74425 11:48 | 0 min | +2 min |
| Sat 3 Oct | 74425 11:42 | −1 min | +1 min |
| Fri 2 Oct | 74425 11:35 | −1 min | +2 min |
| Thu 1 Oct | 74425 11:35 | −1 min | +3 min |
| Wed 30 Sept | 74425 11:35 | −1 min | +1 min |
| Tue 29 Sept | 74425 11:34 | −2 min | +4 min |
| Mon 28 Sept | 74425 11:35 | −1 min | +1 min |
| Sun 27 Sept | 74425 11:48 | 0 min | +1 min |
| Sat 26 Sept | 74425 11:43 | 0 min | +2 min |
| Fri 25 Sept | 74425 11:36 | 0 min | +1 min |
| Thu 24 Sept | 74425 11:35 | −1 min | +3 min |
| Wed 23 Sept | 74425 11:42 | +6 min | +6 min |
| Tue 22 Sept | 74425 11:48 | +13 min | +17 min |
| Mon 21 Sept | 74425 11:36 | 0 min | +6 min |
| Sun 20 Sept | 74425 11:47 | 0 min | — |
| Sat 19 Sept | 74425 11:42 | −1 min | +2 min |
| Fri 18 Sept | 74425 11:36 | 0 min | +4 min |
| Thu 17 Sept | 74425 11:36 | 0 min | +7 min |
| Wed 16 Sept | 74425 11:35 | 0 min | +1 min |
| Tue 15 Sept | 74425 11:35 | −1 min | — |
| Mon 14 Sept | 74425 11:35 | −1 min | +1 min |
| Fri 11 Sept | 74425 11:36 | 0 min | +1 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.