Historical on-time performance
Chicago to Green Bay
173 miData through Dec 2025Source: US DOT · BTS
Flights on ORD–GRB arrive on time 70% of the time over the last 12 months.
On-time rate70%arrived within 15 min
p90 delay60 min1 in 10 flights is worse (tail risk)
Cancelled2.5%of scheduled flights
based on 2,355 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- Republic AirwaysbestOn-time84%Medianon timep9045 minCancel3.6%Flights110
- Envoy AirOn-time73%Medianon timep9050 minCancel3.0%Flights1,013
- SkyWest AirlinesOn-time67%Medianon timep9075 minCancel2.1%Flights1,232
Why flights run late
Delay causes
- Airline33%
- Weather9%
- Air traffic (NAS)18%
- Late aircraft39%
- 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 → GRB
All airlines · rolling 36 months (2023-01 .. 2025-12).
Best time of day
Mornings are the most reliable time of day to fly this route — 81% on time.
- Mornings81% on time · p90 30 min · 1,332 flights
- Middays73% on time · p90 50 min · 937 flights
- Afternoons72% on time · p90 55 min · 1,223 flights
- Overnights71% on time · p90 55 min · 1,007 flights
- Evenings70% on time · p90 70 min · 1,095 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 68% to 78% on time.
- Tuesdays78% on time · p90 35 min · 776 flights
- Saturdays77% on time · p90 45 min · 792 flights
- Wednesdays76% on time · p90 50 min · 762 flights
- Mondays74% on time · p90 50 min · 827 flights
- Thursdays72% on time · p90 45 min · 803 flights
- Fridays72% on time · p90 55 min · 812 flights
- Sundays68% on time · p90 75 min · 822 flights
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