Chiltern Railways 661H81
View line Chiltern Railways
Alerts for train 661H81
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
79%
23/29 runs under 3 min
RT coverage: 29 full · 0 partial · 0 no data
On-time · 90 days
82%
72/88 runs under 3 min
RT coverage: 88 full · 0 partial · 0 no data
Typical delay
0min
Median at arrival, 90 days
30 days: −1 min
P90
+5min
9 in 10 runs arrive with less than this
30 days: +3 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 15 Aug Max en route +19 min · last fix heading to 63018 +18 min
- Sun 27 Sept Max en route +17 min · last fix heading to 63018 +14 min
- Sun 23 Aug Max en route +14 min · last fix heading to 63018 +11 min
- Fri 14 Aug Max en route +13 min · last fix heading to 63018 +11 min
- Mon 17 Aug Max en route +18 min · last fix heading to 63018 +10 min
Distribution · 90 days
88 runs with a known final delay. On time = under 3 min, the same cut the map uses.
- Early 17% · 15
- On time 65% · 57
- 3–10 min 13% · 11
- 10–30 min 6% · 5
- 30+ min 0% · 0
On-time by weekday
- 77% M n=13
- 85% T n=13
- 100% W n=12
- 100% T n=12
- 92% F n=13
- 67% S n=12
- 54% S n=13
Recent runs
| Date | Last stop | Final | Max |
|---|---|---|---|
| Tue 20 Oct | Wembley Stadium 22:36 | 0 min | +2 min |
| Mon 19 Oct | Wembley Stadium 22:34 | −1 min | +5 min |
| Sun 18 Oct | Wembley Stadium 22:23 | −1 min | +1 min |
| Sat 17 Oct | Wembley Stadium 22:22 | −1 min | +2 min |
| Fri 16 Oct | South Ruislip 22:34 | −1 min | +5 min |
| Thu 15 Oct | Wembley Stadium 22:34 | −1 min | +4 min |
| Wed 14 Oct | Wembley Stadium 22:34 | −1 min | +6 min |
| Tue 13 Oct | Wembley Stadium 22:34 | −2 min | +1 min |
| Mon 12 Oct | Wembley Stadium 22:37 | +2 min | +2 min |
| Sun 11 Oct | Wembley Stadium 22:23 | +4 min | +5 min |
| Sat 10 Oct | Wembley Stadium 22:32 | 0 min | +3 min |
| Fri 9 Oct | Wembley Stadium 22:35 | 0 min | +2 min |
| Thu 8 Oct | Wembley Stadium 22:36 | +1 min | +3 min |
| Wed 7 Oct | Wembley Stadium 22:35 | 0 min | +1 min |
| Tue 6 Oct | Wembley Stadium 22:45 | +3 min | +8 min |
| Mon 5 Oct | Wembley Stadium 22:43 | +8 min | +14 min |
| Sun 4 Oct | 63018 22:22 | +3 min | +5 min |
| Sat 3 Oct | Wembley Stadium 22:24 | +1 min | +2 min |
| Fri 2 Oct | 63018 22:35 | 0 min | +4 min |
| Thu 1 Oct | 63018 22:34 | −1 min | +2 min |
| Wed 30 Sept | 63018 22:34 | −1 min | +3 min |
| Tue 29 Sept | 63018 22:38 | +3 min | +4 min |
| Mon 28 Sept | 63018 22:33 | −2 min | +2 min |
| Sun 27 Sept | 63018 22:33 | +14 min | +17 min |
| Sat 26 Sept | 63018 22:30 | −2 min | +3 min |
| Fri 25 Sept | 63018 22:34 | −1 min | +7 min |
| Thu 24 Sept | 63018 22:34 | −1 min | +2 min |
| Wed 23 Sept | 63018 22:34 | −1 min | +3 min |
| Tue 22 Sept | 63018 22:34 | −1 min | +2 min |
| Mon 21 Sept | 63018 22:37 | +2 min | +5 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.