O'Hare departures back near normal: 0% late in the last hour
- Current state
- Resolved at 6:49 AM CST
- Started
- Latest activity
- Updates
- 3
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: 56% left 15+ min late in the last hour
Of 27 departures that took off between 10:30 PM and 11:30 PM CDT, 15 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.
Evidence for this update
Measurement window 10:30 PM–11:30 PM CDT Sample 27 flights, 15 late (56%) Comparison 35% typical · US DOT on-time data, last 12 published months, departures in the 11 PM 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 (2026-11-01 04:30 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? -
Escalation Observed
O'Hare departure delays worsen: 75% late in the last hour
What changed: late share 56% → 75%
Of 24 departures that took off between 11:11 PM and 12:11 AM CDT, 18 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.
Evidence for this update
Measurement window 11:11 PM–12:11 AM CDT Sample 24 flights, 18 late (75%) Comparison 35% typical · US DOT on-time data, last 12 published months, departures in the 11 PM hour Median delay 41.0 min Method FAA wheels-off/on +/- median taxi (taxi_times) vs the FAA-filed airline schedule (flight_odds) Source event time Ingested Published here (2026-11-01 05:11 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: 0% late in the last hour
What changed: late share 100% at worst → 0% now
Of 21 departures that took off between 5:49 AM and 6:49 AM CST, 0 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 window 5:49 AM–6:49 AM CST Sample 21 flights, 0 late (0%) Comparison 11% typical · US DOT on-time data, last 12 published months, departures in the 6 AM hour Median delay -7.0 min Method FAA wheels-off/on +/- median taxi (taxi_times) vs the FAA-filed airline schedule (flight_odds) Source event time Ingested Published here (2026-11-01 12:49 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?