Historical on-time performance
Chicago to Rochester
528 miData through Dec 2025Source: US DOT · BTS
Flights on ORD–ROC arrive on time 75% of the time over the last 12 months.
On-time rate75%arrived within 15 min
p90 delay45 min1 in 10 flights is worse (tail risk)
Cancelled1.6%of scheduled flights
based on 1,954 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.
- Republic AirwaysOn-time77%Medianon timep9045 minCancel2.6%Flights509
- United AirlinesOn-time67%Medianon timep9055 minCancel1.3%Flights527
- Envoy AirOn-time79%Medianon timep9035 minCancel1.2%Flights918
Why flights run late
Delay causes
- Airline25%
- Weather10%
- Air traffic (NAS)20%
- Late aircraft44%
- Security0%
Most delay minutes here are attributed to Late aircraft.
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 (2023-01 .. 2025-12).
Best time of day
On-time rates are fairly even by time of day on this route — ranging from 64% to 82% on time.
- Middays82% on time · p90 35 min · 816 flights
- Mornings80% on time · p90 30 min · 1,144 flights
- Afternoons79% on time · p90 35 min · 1,241 flights
- Evenings71% on time · p90 45 min · 1,552 flights
- Overnights64% on time · p90 80 min · 379 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 73% to 79% on time.
- Tuesdays79% on time · p90 35 min · 708 flights
- Mondays78% on time · p90 35 min · 774 flights
- Saturdays77% on time · p90 40 min · 628 flights
- Wednesdays76% on time · p90 40 min · 737 flights
- Thursdays76% on time · p90 40 min · 763 flights
- Fridays74% on time · p90 50 min · 765 flights
- Sundays73% on time · p90 55 min · 759 flights
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