Chiltern Railways 661H27
View line Chiltern Railways
Alerts for train 661H27
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
70%
19/27 runs under 3 min
RT coverage: 27 full · 0 partial · 0 no data
On-time · 90 days
63%
49/78 runs under 3 min
RT coverage: 78 full · 0 partial · 0 no data
Typical delay
0min
Median at arrival, 90 days
30 days: −1 min
P90
+13min
9 in 10 runs arrive with less than this
30 days: +8 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
- Wed 12 Aug Max en route +51 min · last fix heading to 63018 +51 min
- Tue 15 Sept Max en route +27 min · last fix heading to 63018 +27 min
- Fri 25 Sept Max en route +16 min · last fix heading to 63018 +15 min
- Fri 17 Jul Max en route +15 min · last fix heading to West Ruislip +15 min
- Sun 9 Aug Max en route +14 min · last fix heading to 63018 +14 min
Distribution · 90 days
78 runs with a known final delay. On time = under 3 min, the same cut the map uses.
- Early 22% · 17
- On time 41% · 32
- 3–10 min 22% · 17
- 10–30 min 14% · 11
- 30+ min 1% · 1
On-time by weekday
- 85% M n=13
- 83% T n=12
- 69% W n=13
- 62% T n=13
- 46% F n=13
- 100% S n=2
- 25% S n=12
Recent runs
| Date | Last stop | Final | Max |
|---|---|---|---|
| Mon 12 Oct | Wembley Stadium 10:52 | −1 min | +2 min |
| Sun 11 Oct | Wembley Stadium 11:09 | +9 min | +11 min |
| Sat 10 Oct | Wembley Stadium 10:53 | 0 min | +3 min |
| Fri 9 Oct | Wembley Stadium 10:52 | −2 min | +4 min |
| Thu 8 Oct | Wembley Stadium 11:01 | +7 min | +13 min |
| Wed 7 Oct | Wembley Stadium 10:53 | −1 min | +2 min |
| Tue 6 Oct | Wembley Stadium 10:52 | −1 min | +5 min |
| Mon 5 Oct | 63018 10:52 | −1 min | +2 min |
| Sun 4 Oct | 63018 11:03 | +3 min | +5 min |
| Fri 2 Oct | 63018 10:57 | +4 min | +8 min |
| Thu 1 Oct | 63018 10:52 | −2 min | +8 min |
| Wed 30 Sept | 63018 10:52 | −1 min | +1 min |
| Tue 29 Sept | 63018 10:52 | −1 min | +3 min |
| Mon 28 Sept | 63018 10:52 | −1 min | +2 min |
| Sun 27 Sept | 63018 11:06 | +5 min | +8 min |
| Fri 25 Sept | 63018 11:08 | +15 min | +16 min |
| Thu 24 Sept | 63018 10:53 | −1 min | +2 min |
| Wed 23 Sept | 63018 10:52 | −1 min | +1 min |
| Tue 22 Sept | 63018 10:55 | +2 min | +2 min |
| Mon 21 Sept | 63018 10:57 | +4 min | +5 min |
| Sun 20 Sept | 63018 11:02 | +2 min | +5 min |
| Fri 18 Sept | 63018 10:52 | −1 min | +2 min |
| Thu 17 Sept | 63018 10:52 | −2 min | +2 min |
| Wed 16 Sept | 63018 10:53 | 0 min | +6 min |
| Tue 15 Sept | 63018 11:20 | +27 min | +27 min |
| Mon 14 Sept | 63018 10:51 | −2 min | +1 min |
| Sun 13 Sept | 69440 10:05 | −3 min | +1 min |
| Sat 12 Sept | 69440 10:04 | −5 min | +2 min |
| Fri 11 Sept | 63018 10:53 | −1 min | +1 min |
| Thu 10 Sept | 63018 10:51 | −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.