tailodds FORECAST
Partly stale · checked FAA NAS status 223 h staleForecast cycle 83 minLightning 223 h staleWeather observations no data staleFAA surface data 2 minFAA flight data 2 min

FAA NAS status is stale (223 h old). No FAA restriction can start or end on the wire until it is fresh again.

Lightning is stale (223 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 ORD departures

O'Hare departures back near normal: 28% late in the last hour

Current state
Resolved at 12:06 AM CST
Started
Latest activity
Updates
2
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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

    O'Hare departures running late: 66% left 15+ min late in the last hour

    Of 67 departures that took off between 7:06 PM and 8:06 PM CST, 44 left at least 15 minutes late. O'Hare typically sees 38% of departures in this hour leave that late (US DOT on-time data, last 12 published months, departures in the 7 PM hour). Measured by Tailodds from FAA flight data against airline schedules.

    Evidence for this update
    Measurement window7:06 PM–8:06 PM CST
    Sample67 flights, 44 late (66%)
    Comparison38% typical · US DOT on-time data, last 12 published months, departures in the 7 PM hour
    Median delay23.0 min
    MethodFAA wheels-off/on +/- median taxi (taxi_times) vs the FAA-filed airline schedule (flight_odds)
    Source event time
    Ingested
    Published here (2026-11-04 02:06 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. Recovery Observed

    O'Hare departures back near normal: 28% late in the last hour

    What changed: late share 66% at worst → 28% now

    Of 18 departures that took off between 11:06 PM and 12:06 AM CST, 5 left at least 15 minutes late. O'Hare typically sees 35% of departures in this hour leave that late (US DOT on-time data, last 12 published months, departures in the 11 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 window11:06 PM–12:06 AM CST
    Sample18 flights, 5 late (28%)
    Comparison35% typical · US DOT on-time data, last 12 published months, departures in the 11 PM hour
    Median delay7.0 min
    MethodFAA wheels-off/on +/- median taxi (taxi_times) vs the FAA-filed airline schedule (flight_odds)
    Source event time
    Ingested
    Published here (2026-11-04 06:06 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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