Chiltern Railways 631T27
View line Chiltern Railways
Alerts for train 631T27
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
76%
22/29 runs under 3 min
RT coverage: 29 full · 0 partial · 0 no data
On-time · 90 days
62%
54/87 runs under 3 min
RT coverage: 87 full · 0 partial · 0 no data
Typical delay
+1min
Median at arrival, 90 days
30 days: +1 min
P90
+8min
9 in 10 runs arrive with less than this
30 days: +6 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
- Mon 2 Nov Max en route +22 min · last fix heading to Oxford Parkway +21 min
- Wed 12 Aug Max en route +18 min · last fix heading to 74425 +18 min
- Mon 21 Sept Max en route +14 min · last fix heading to 74425 +14 min
- Sat 22 Aug Max en route +18 min · last fix heading to 74425 +14 min
- Mon 26 Oct Max en route +13 min · last fix heading to Islip +13 min
Distribution · 90 days
87 runs with a known final delay. On time = under 3 min, the same cut the map uses.
- Early 1% · 1
- On time 61% · 53
- 3–10 min 29% · 25
- 10–30 min 9% · 8
- 30+ min 0% · 0
On-time by weekday
- 31% M n=13
- 38% T n=13
- 62% W n=13
- 54% T n=13
- 67% F n=12
- 91% S n=11
- 100% S n=12
Recent runs
| Date | Last stop | Final | Max |
|---|---|---|---|
| Thu 5 Nov | Oxford Parkway 13:04 | +5 min | +5 min |
| Wed 4 Nov | Oxford Parkway 12:59 | 0 min | +2 min |
| Tue 3 Nov | Oxford Parkway 12:59 | 0 min | +1 min |
| Mon 2 Nov | Oxford Parkway 13:19 | +21 min | +22 min |
| Sun 1 Nov | Islip 13:17 | 0 min | +5 min |
| Sat 31 Oct | Oxford Parkway 13:14 | +2 min | +2 min |
| Fri 30 Oct | Oxford Parkway 13:09 | +1 min | +2 min |
| Thu 29 Oct | Oxford Parkway 13:09 | +1 min | +1 min |
| Wed 28 Oct | Oxford Parkway 13:10 | +2 min | +2 min |
| Tue 27 Oct | Oxford Parkway 13:15 | +7 min | +8 min |
| Mon 26 Oct | Islip 13:21 | +13 min | +13 min |
| Sun 25 Oct | Islip 13:17 | 0 min | +1 min |
| Sat 24 Oct | Oxford Parkway 13:12 | 0 min | +2 min |
| Fri 23 Oct | Islip 13:10 | +2 min | +3 min |
| Thu 22 Oct | Oxford Parkway 13:08 | 0 min | +1 min |
| Wed 21 Oct | Oxford Parkway 13:08 | 0 min | — |
| Tue 20 Oct | Oxford Parkway 13:11 | +4 min | +4 min |
| Mon 19 Oct | Oxford Parkway 13:09 | +2 min | +2 min |
| Sun 18 Oct | Oxford Parkway 13:18 | 0 min | — |
| Sat 17 Oct | Oxford Parkway 13:11 | −1 min | — |
| Fri 16 Oct | Oxford Parkway 13:09 | +1 min | +3 min |
| Thu 15 Oct | Oxford Parkway 13:08 | 0 min | — |
| Wed 14 Oct | Oxford Parkway 13:08 | 0 min | — |
| Tue 13 Oct | Oxford Parkway 13:14 | +6 min | +6 min |
| Mon 12 Oct | Islip 13:11 | +3 min | +3 min |
| Sun 11 Oct | Islip 13:18 | +1 min | +1 min |
| Sat 10 Oct | Oxford Parkway 13:11 | 0 min | +1 min |
| Fri 9 Oct | Islip 13:10 | +2 min | +3 min |
| Thu 8 Oct | Oxford Parkway 13:08 | 0 min | +1 min |
| Wed 7 Oct | Oxford Parkway 13:10 | +2 min | +2 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.