Historical on-time performance
Green Bay to Chicago
173 miData through May 2026Source: US DOT · BTS
Flights on GRB–ORD arrive on time 68% of the time over the last 12 months.
On-time rate68%arrived within 15 min
p90 delay70 min1 in 10 flights is worse (tail risk)
Cancelled3.9%of scheduled flights
based on 2,805 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- Envoy AirbestOn-time71%Medianon timep9055 minCancel3.4%Flights1,371
- Republic AirwaysOn-time69%Medianon timep9045 minCancel5.8%Flights154
- SkyWest AirlinesOn-time63%Medianon timep9085 minCancel4.2%Flights1,280
Why flights run late
Delay causes
- Airline17%
- Weather13%
- Air traffic (NAS)26%
- Late aircraft44%
- Security0%
Most delay minutes here are attributed to Late aircraft.
When flights don't go
Why flights were cancelled
- Airline1%
- Weather72%
- Air traffic (NAS)27%
- Security0%
Most cancellations here are attributed to Weather. Shares are among 110 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 GRB → 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 — 81% on time.
- Mornings81% on time · p90 35 min · 2,401 flights
- Middays77% on time · p90 45 min · 1,622 flights
- Afternoons69% on time · p90 75 min · 863 flights
- Evenings57% on time · p90 90 min · 1,207 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 70% to 77% on time.
- Saturdays77% on time · p90 40 min · 854 flights
- Tuesdays76% on time · p90 55 min · 850 flights
- Wednesdays75% on time · p90 55 min · 838 flights
- Mondays74% on time · p90 45 min · 915 flights
- Thursdays72% on time · p90 65 min · 886 flights
- Sundays70% on time · p90 80 min · 903 flights
- Fridays70% on time · p90 65 min · 901 flights
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