LIRR 421 Huntington – Port Jefferson

View line LIRR

Huntington 23:42 → Port Jefferson 00:29 Mon, Tue, Wed, Thu, Fri 0 h 47 min · 8 stops MTA LIRR

Running now · updated 00:27

Between Stony Brook and Port Jefferson +2 min

Estimated arrival at Port Jefferson 00:31 00:29 · 97 km/h

  1. Huntington23:42
  2. Greenlawn23:48
  3. Northport23:53
  4. Smithtown00:06
  5. St. James00:11
  6. Stony Brook00:17
  7. Port Jefferson00:29

Today it is running no worse than usual: typical arrival delay is +3 min; 53% of the last 19 runs arrived on time.

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On-time · 30 days
53%
10/19 runs under 3 min
RT coverage: 19 full · 0 partial · 3 no data
On-time · 90 days
53%
10/19 runs under 3 min
RT coverage: 19 full · 0 partial · 3 no data
Typical delay
+3min
Median at arrival, 90 days
30 days: +3 min
P90
+7min
9 in 10 runs arrive with less than this
30 days: +7 min

Last 30 days

Arrival delay at Port Jefferson, in minutes. One bar per run.

  • On time (<3 min)
  • 3–10 min
  • 10–30 min
  • 30+ min
  • Partial coverage
  • No data

Worst days

  • Tue 6 Oct Max en route +11 min · last fix heading to Port Jefferson +11 min
  • Sat 10 Oct Max en route +21 min · last fix heading to Port Jefferson +7 min
  • Fri 16 Oct Max en route +9 min · last fix heading to Oyster Bay +7 min
  • Tue 13 Oct Max en route +18 min · last fix heading to Patchogue +6 min
  • Sun 11 Oct Max en route +8 min · last fix heading to Port Jefferson +5 min

Distribution · 90 days

19 runs with a known final delay. On time = under 3 min, the same cut the map uses.

  • Early 32% · 6
  • On time 21% · 4
  • 3–10 min 42% · 8
  • 10–30 min 5% · 1
  • 30+ min 0% · 0

On-time by weekday

  • 100% M n=3
  • 33% T n=3
  • 67% W n=3
  • 33% T n=3
  • 50% F n=2
  • 50% S n=2
  • 33% S n=3

Stops and timetable

Timetable of the latest run from the operator’s GTFS (8 stops).

StopSched.Today
Huntington
23:42Passed
Greenlawn
23:48Passed
Northport
23:53Passed
Kings Park
23:58Passed
Smithtown
00:06Passed
St. James
00:11Passed
Stony Brook
00:17Passed
Port Jefferson
00:29Next

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 10 July 2026.

Recent runs

DateLast stopFinalMax
Thu 22 OctPort Jefferson 00:23+5 min+7 min
Wed 21 OctPort Jefferson 21:39+2 min+4 min
Tue 20 OctPort Jefferson 18:330 min+9 min
Mon 19 OctPatchogue 23:40+3 min+9 min
Sun 18 OctPatchogue 18:48+4 min+8 min
Sat 17 OctSpeonk 01:15−2 min+7 min
Fri 16 OctOyster Bay 20:17+7 min+9 min
Thu 15 OctMontauk 22:01−2 min+7 min
Wed 14 OctPort Jefferson 23:41−2 min+37 min
Tue 13 OctPatchogue 19:43+6 min+18 min
Mon 12 OctOyster Bay 17:46−2 min+3 min
Sun 11 OctPort Jefferson 01:13+5 min+8 min
Sat 10 OctPort Jefferson 01:12+7 min+21 min
Fri 9 OctPort Jefferson 23:44−3 min+8 min
Thu 8 OctBay Shore 18:47+4 min+5 min
Wed 7 OctPort Jefferson 22:46+4 min+6 min
Tue 6 OctPort Jefferson 21:11+11 min+11 min
Mon 5 OctSpeonk 02:00+3 min+9 min
Sun 4 Oct154 01:12−2 min+1 min
Fri 2 Oct90505 00:12No data—
Wed 30 Sept1 15:55No data—
Mon 28 Sept90205 16:21No data—