Historical on-time performance
Chicago to Raleigh-durham
Flights on ORD–RDU arrive on time 72% of the time over the last 12 months.
based on 3,281 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
Too close to call — no single carrier is clearly more on-time here.
- United AirlinesOn-time77%Medianon timep9045 minCancel0.9%Flights1,310
- Envoy AirOn-time76%Medianon timep9045 minCancel2.0%Flights459
- Republic AirwaysOn-time70%Medianon timep9060 minCancel2.6%Flights952
- American AirlinesOn-time61%Medianon timep9085 minCancel2.7%Flights560
Why flights run late
Delay causes
- Airline26%
- Weather9%
- Air traffic (NAS)18%
- Late aircraft47%
- Security0%
Most delay minutes here are attributed to Late aircraft.
When flights don't go
Why flights were cancelled
- Airline2%
- Weather79%
- Air traffic (NAS)20%
- Security0%
Most cancellations here are attributed to Weather. Shares are among 61 cancellations with a reported cause (BTS reports causes from June 2003).
Over time
On-time trend
By season
On-time rate by month
When to fly
Best time to fly ORD → RDU
All airlines · rolling 36 months (2023-06 .. 2026-05).
Best time of day
Mornings are the most reliable time of day to fly this route — 86% on time.
- Mornings86% on time · p90 20 min · 2,567 flights
- Middays79% on time · p90 45 min · 2,414 flights
- Afternoons76% on time · p90 50 min · 1,811 flights
- Evenings67% on time · p90 70 min · 2,275 flights
- Overnights57% on time · p90 80 min · 543 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 72% to 79% on time.
- Tuesdays79% on time · p90 40 min · 1,294 flights
- Saturdays78% on time · p90 45 min · 1,210 flights
- Wednesdays77% on time · p90 45 min · 1,304 flights
- Thursdays76% on time · p90 50 min · 1,465 flights
- Mondays76% on time · p90 50 min · 1,450 flights
- Sundays75% on time · p90 60 min · 1,453 flights
- Fridays72% on time · p90 55 min · 1,437 flights
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