O'Hare departures back near normal: 20% late in the last hour
- Current state
- Resolved at 1:35 PM CDT
- Started
- Latest activity
- Updates
- 2
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
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Initial Observed
O'Hare departures running late: 51% left 15+ min late in the last hour
Of 65 departures that took off between 11:14 AM and 12:14 PM CDT, 33 left at least 15 minutes late. O'Hare typically sees 24% of departures in this hour leave that late (US DOT on-time data, last 12 published months, departures in the 11 AM hour). Measured by Tailodds from FAA flight data against airline schedules.
Evidence for this update
Measurement window 11:14 AM–12:14 PM CDT Sample 65 flights, 33 late (51%) Comparison 24% typical · US DOT on-time data, last 12 published months, departures in the 11 AM hour Median delay 15.0 min Method FAA wheels-off/on +/- median taxi (taxi_times) vs the FAA-filed airline schedule (flight_odds) Source event time Ingested Published here (2026-10-20 17:14 UTC) Sources Tailodds measurement of FAA flight data against airline schedules Provenance observed_ops observed-ops-v1 · config 2026-10-17.1 · writer template-v1 Was this useful? -
Recovery Observed
O'Hare departures back near normal: 20% late in the last hour
What changed: late share 52% at worst → 20% now
Of 70 departures that took off between 12:35 PM and 1:35 PM CDT, 14 left at least 15 minutes late. O'Hare typically sees 24% 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. 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 window 12:35 PM–1:35 PM CDT Sample 70 flights, 14 late (20%) Comparison 24% typical · US DOT on-time data, last 12 published months, departures in the 1 PM hour Median delay -2.0 min Method FAA wheels-off/on +/- median taxi (taxi_times) vs the FAA-filed airline schedule (flight_odds) Source event time Ingested Published here (2026-10-20 18:35 UTC) Sources Tailodds measurement of FAA flight data against airline schedules Provenance observed_ops observed-ops-v1 · config 2026-10-17.1 · writer template-v1 Was this useful?