Historical on-time performance
Rochester to Chicago
528 miData through May 2026Source: US DOT · BTS
Flights on ROC–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 2,085 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- Republic AirwaysbestOn-time79%Medianon timep9050 minCancel2.2%Flights625
- Envoy AirOn-time74%Medianon timep9055 minCancel2.2%Flights853
- United AirlinesOn-time66%Medianon timep9075 minCancel1.4%Flights561
- SkyWest AirlinesOn-time54%Median10 minp90100 minCancel2.2%Flights46
Why flights run late
Delay causes
- Airline23%
- Weather4%
- Air traffic (NAS)38%
- Late aircraft36%
- Security0%
Most delay minutes here are attributed to Air traffic (NAS).
When flights don't go
Why flights were cancelled
- Airline2%
- Weather62%
- Air traffic (NAS)36%
- 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 ROC → 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 — 85% on time.
- Mornings85% on time · p90 20 min · 2,026 flights
- Middays82% on time · p90 35 min · 1,713 flights
- Afternoons76% on time · p90 45 min · 276 flights
- Evenings63% on time · p90 75 min · 1,601 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 40 min · 793 flights
- Saturdays78% on time · p90 45 min · 712 flights
- Mondays78% on time · p90 40 min · 843 flights
- Thursdays78% on time · p90 40 min · 841 flights
- Wednesdays77% on time · p90 35 min · 810 flights
- Fridays75% on time · p90 40 min · 843 flights
- Sundays73% on time · p90 60 min · 834 flights
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