tailodds FORECAST
Partly stale · checked FAA NAS status 223 h staleForecast cycle 84 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: 7% late in the last hour

Current state
Resolved at 6:51 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: 59% left 15+ min late in the last hour

    Of 70 departures that took off between 8:38 PM and 9:38 PM CST, 41 left at least 15 minutes late. O'Hare typically sees 34% of departures in this hour leave that late (US DOT on-time data, last 12 published months, departures in the 9 PM hour). Measured by Tailodds from FAA flight data against airline schedules.

    Evidence for this update
    Measurement window8:38 PM–9:38 PM CST
    Sample70 flights, 41 late (59%)
    Comparison34% typical · US DOT on-time data, last 12 published months, departures in the 9 PM hour
    Median delay22.0 min
    MethodFAA wheels-off/on +/- median taxi (taxi_times) vs the FAA-filed airline schedule (flight_odds)
    Source event time
    Ingested
    Published here (2026-11-06 03:38 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: 7% late in the last hour

    What changed: late share 75% at worst → 7% now

    Of 27 departures that took off between 5:51 AM and 6:51 AM CST, 2 left at least 15 minutes late. O'Hare typically sees 11% of departures in this hour leave that late (US DOT on-time data, last 12 published months, departures in the 6 AM hour). Measured by Tailodds from FAA flight data against airline schedules. The late share has stayed at or below 21% for 31 minutes across 16 checks, each with at least 12 flights and current data.

    Evidence for this update
    Measurement window5:51 AM–6:51 AM CST
    Sample27 flights, 2 late (7%)
    Comparison11% typical · US DOT on-time data, last 12 published months, departures in the 6 AM 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 (2026-11-06 12:51 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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