Historical on-time performance
Chicago to Rochester
Flights on ORD–ROC arrive on time 74% of the time over the last 12 months.
based on 2,121 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.
- Envoy AirOn-time78%Medianon timep9040 minCancel2.2%Flights853
- Republic AirwaysOn-time77%Medianon timep9050 minCancel2.1%Flights665
- United AirlinesOn-time64%Medianon timep9070 minCancel1.4%Flights557
- SkyWest AirlinesOn-time63%Medianon timep9070 minCancel2.2%Flights46
Why flights run late
Delay causes
- Airline24%
- Weather7%
- Air traffic (NAS)21%
- Late aircraft49%
- Security0%
Most delay minutes here are attributed to Late aircraft.
When flights don't go
Why flights were cancelled
- Airline2%
- Weather67%
- Air traffic (NAS)31%
- Security0%
Most cancellations here are attributed to Weather. Shares are among 42 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 → ROC
All airlines · rolling 36 months (2023-06 .. 2026-05).
Best time of day
On-time rates are fairly even by time of day on this route — ranging from 66% to 82% on time.
- Mornings82% on time · p90 30 min · 1,260 flights
- Middays80% on time · p90 40 min · 1,027 flights
- Afternoons77% on time · p90 40 min · 1,244 flights
- Evenings69% on time · p90 55 min · 1,534 flights
- Overnights66% on time · p90 70 min · 474 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 70% to 77% on time.
- Mondays77% on time · p90 40 min · 823 flights
- Tuesdays77% on time · p90 35 min · 766 flights
- Saturdays77% on time · p90 40 min · 701 flights
- Thursdays76% on time · p90 40 min · 822 flights
- Wednesdays76% on time · p90 40 min · 793 flights
- Fridays74% on time · p90 50 min · 820 flights
- Sundays70% on time · p90 60 min · 816 flights
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