Historical on-time performance
Raleigh-durham to Chicago
646 miData through May 2026Source: US DOT · BTS
Flights on RDU–ORD arrive on time 73% of the time over the last 12 months.
On-time rate73%arrived within 15 min
p90 delay60 min1 in 10 flights is worse (tail risk)
Cancelled2.0%of scheduled flights
based on 3,279 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- American AirlinesbestOn-time81%Medianon timep9040 minCancel2.7%Flights559
- United AirlinesOn-time76%Medianon timep9045 minCancel1.0%Flights1,308
- Envoy AirOn-time72%Medianon timep9065 minCancel2.0%Flights461
- Republic AirwaysOn-time67%Medianon timep9075 minCancel2.9%Flights951
Why flights run late
Delay causes
- Airline25%
- Weather7%
- Air traffic (NAS)33%
- Late aircraft34%
- Security0%
Most delay minutes here are attributed to Late aircraft.
When flights don't go
Why flights were cancelled
- Airline2%
- Weather78%
- Air traffic (NAS)20%
- Security0%
Most cancellations here are attributed to Weather. Shares are among 65 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 RDU → ORD
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 · 3,500 flights
- Middays84% on time · p90 25 min · 2,271 flights
- Afternoons73% on time · p90 65 min · 1,775 flights
- Evenings61% on time · p90 85 min · 1,989 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 74% to 80% on time.
- Wednesdays80% on time · p90 40 min · 1,306 flights
- Tuesdays80% on time · p90 45 min · 1,288 flights
- Saturdays80% on time · p90 40 min · 1,207 flights
- Mondays79% on time · p90 40 min · 1,447 flights
- Thursdays76% on time · p90 45 min · 1,470 flights
- Sundays75% on time · p90 55 min · 1,457 flights
- Fridays74% on time · p90 55 min · 1,438 flights
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