Green Bay (GRB) to Chicago (ORD): On-Time Performance
Data through May 2026
Green Bay (GRB) to Chicago (ORD) effectively runs on two schedules. In October 2024, 85% of arrivals were on time; in December 2025 that fell to 60% — a 25-point seasonal swing. Across the full period the route averages 73% on-time against a national 78%. Morning departures also hold up better than evening ones (81% vs 52%), which matters most in the rough months.
- On-time
- 73%
- arrived <15 min late
- Avg delay
- 22 min
- completed flights
- Cancelled
- 2.9%
- Flights/day
- 7.8
- last 12 months
- Duration
- 1h 20m
- scheduled
- Distance
- 173 mi
Best airline from GRB to ORD
3 airlines flew this route regularly between 2024-06 and 2026-05.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| Republic Airwaysmost reliable | 78% | 14 min | 3.9% | 258 |
| Envoy Air | 75% | 17 min | 2.9% | 1,735 |
| SkyWest Airlines | 71% | 27 min | 2.8% | 2,505 |
Monthly on-time trend
Best time to fly from GRB to ORD
Aim for departures around 6 a.m. (83% on-time); avoid 5 p.m. departures (51%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 76% | 19 min |
| Tuesday | 76% | 24 min |
| Wednesday | 75% | 19 min |
| Thursday | 71% | 24 min |
| Friday | 67% | 24 min |
| Saturdaybest | 77% | 19 min |
| Sunday | 69% | 27 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft40%
- Airline operations25%
- National airspace system24%
- Weather11%
Frequently asked questions
- How often are flights from GRB to ORD delayed?
- 27% of GRB–ORD flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-06 and 2026-05. The average arrival delay across completed flights was 22 minutes.
- Which airline is most reliable from GRB to ORD?
- Republic Airways has the best on-time record on this route at 78%, based on 258 flights. 3 airlines flew GRB–ORD frequently enough to compare in this period.
- What is the best time of day to fly from GRB to ORD?
- Departures around 6 a.m. have the best record (83% on-time), while departures around 5 p.m. have the worst (51%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from GRB to ORD?
- The scheduled GRB–ORD flight time averages 1h 20m over 173 miles. Actual arrival times vary — flights on this route land 15+ minutes late 27% of the time.
- How often are GRB to ORD flights cancelled?
- 2.9% of scheduled flights on this route were cancelled between 2024-06 and 2026-05, slightly above the national rate of 1.6%.
- What is the worst month to fly from GRB to ORD?
- December 2025 was the roughest month in this dataset, with only 60% of arrivals on time. The best was October 2024 at 85%. If your dates are flexible, that 25-point gap is worth planning around.
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Based on 4,498 flights, 2024-06–2026-05. Source: US DOT Bureau of Transportation Statistics. Updated 2026-07-01.