Partly stale · checked FAA NAS status 222 h staleForecast cycle 70 minLightning 222 h staleWeather observations no data staleFAA surface data 1 minFAA flight data 3 min

FAA NAS status is stale (222 h old). No FAA restriction can start or end on the wire until it is fresh again.

Lightning is stale (222 h old). Lightning items are paused; thunderstorm items still come from official observations.

Weather observations is stale. Weather items are paused until it is fresh again; missing observations never end a weather event.

Observed Significant Resolved Delay BOS departures

Boston departures back near normal: 19% late in the last hour

Current state
Resolved at 2:31 PM EST
Started
Latest activity
Updates
4
Create monitor View BOSFlights at BOS

Tailodds reports what the FAA publishes, what we measure and what our model forecasts. It doesn’t control airport operations or change bookings; check with your airline about your trip.

Updates oldest first

  1. Initial Observed

    Boston departures running late: 59% left 15+ min late in the last hour

    Of 27 departures that took off between 8:07 AM and 9:07 AM EST, 16 left at least 15 minutes late. Boston typically sees 12% of departures in this hour leave that late (US DOT on-time data, last 12 published months, departures in the 8 AM hour). Measured by Tailodds from FAA flight data against airline schedules.

    Evidence for this update
    Measurement window8:07 AM–9:07 AM EST
    Sample27 flights, 16 late (59%)
    Comparison12% typical · US DOT on-time data, last 12 published months, departures in the 8 AM hour
    Median delay19.0 min
    MethodFAA wheels-off/on +/- median taxi (taxi_times) vs the FAA-filed airline schedule (flight_odds)
    Source event time
    Ingested
    Published here (2026-11-07 14:07 UTC)
    SourcesTailodds measurement of FAA flight data against airline schedules
    Provenanceobserved_ops observed-ops-v1 · config 2026-10-17.1 · writer template-v1
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  2. Escalation Observed

    Boston departure delays worsen: 95% late in the last hour

    What changed: late share 59% → 95%

    Of 21 departures that took off between 8:28 AM and 9:28 AM EST, 20 left at least 15 minutes late. Boston typically sees 12% of departures in this hour leave that late (US DOT on-time data, last 12 published months, departures in the 8 AM hour). Measured by Tailodds from FAA flight data against airline schedules.

    Evidence for this update
    Measurement window8:28 AM–9:28 AM EST
    Sample21 flights, 20 late (95%)
    Comparison12% typical · US DOT on-time data, last 12 published months, departures in the 8 AM hour
    Median delay34.0 min
    MethodFAA wheels-off/on +/- median taxi (taxi_times) vs the FAA-filed airline schedule (flight_odds)
    Source event time
    Ingested
    Published here (2026-11-07 14:28 UTC)
    SourcesTailodds measurement of FAA flight data against airline schedules
    Provenanceobserved_ops observed-ops-v1 · config 2026-10-17.1 · writer template-v1
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  3. De-escalation Observed

    Boston departure delays ease: 44% late in the last hour, still above normal

    What changed: late share 95% → 44%

    Of 27 departures that took off between 12:39 PM and 1:39 PM EST, 12 left at least 15 minutes late. Boston typically sees 22% of departures in this hour leave that late (US DOT on-time data, last 12 published months, departures in the 1 PM hour). Measured by Tailodds from FAA flight data against airline schedules.

    Evidence for this update
    Measurement window12:39 PM–1:39 PM EST
    Sample27 flights, 12 late (44%)
    Comparison22% typical · US DOT on-time data, last 12 published months, departures in the 1 PM hour
    Median delay10.0 min
    MethodFAA wheels-off/on +/- median taxi (taxi_times) vs the FAA-filed airline schedule (flight_odds)
    Source event time
    Ingested
    Published here (2026-11-07 18:39 UTC)
    SourcesTailodds measurement of FAA flight data against airline schedules
    Provenanceobserved_ops observed-ops-v1 · config 2026-10-17.1 · writer template-v1
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  4. Recovery Observed

    Boston departures back near normal: 19% late in the last hour

    What changed: late share 100% at worst → 19% now

    Of 16 departures that took off between 1:31 PM and 2:31 PM EST, 3 left at least 15 minutes late. Boston typically sees 24% of departures in this hour leave that late (US DOT on-time data, last 12 published months, departures in the 2 PM hour). Measured by Tailodds from FAA flight data against airline schedules. The late share has stayed at or below 30% for 31 minutes across 16 checks, each with at least 12 flights and current data.

    Evidence for this update
    Measurement window1:31 PM–2:31 PM EST
    Sample16 flights, 3 late (19%)
    Comparison24% typical · US DOT on-time data, last 12 published months, departures in the 2 PM hour
    Median delay-4.0 min
    MethodFAA wheels-off/on +/- median taxi (taxi_times) vs the FAA-filed airline schedule (flight_odds)
    Source event time
    Ingested
    Published here (2026-11-07 19:31 UTC)
    SourcesTailodds measurement of FAA flight data against airline schedules
    Provenanceobserved_ops observed-ops-v1 · config 2026-10-17.1 · writer template-v1
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