Route Reliability
GRB → Chicago
GRB–ORD · 173 miles · GRB Airport to Chicago O'Hare International Airport
- 71%
- Arrive within 15 minutes
- 19 min
- Average arrival delay
- 3.4%
- Cancelled
- 3,685
- Flights in the data
Data through May 2026.
Who flies it best
Ranked by on-time arrivals. Historical results, not predictions.
- 1.American Airlines75%1,386 flights
- 2.United Airlines68%2,299 flights
What the data says
Morning-you made the right choice.
GRB–ORD flights departing between 3–6 AM arrived on time 83% of the time, versus 56% between 6–9 PM.
Friday is doing you no favors.
GRB–ORD flights arrived on time 76% of the time on Saturdays. On Fridays: 64%.
American Airlines runs this route best.
American Airlines arrived on time 75% of the time on this route; United Airlines managed 68%.
Keep a backup plan handy.
This route was cancelled 3.4% of the time. Typical for U.S. flights is around 1–2%.
Best historical flights
Ranked by on-time arrivals, minimum 100 flights. Past performance, not a promise.
Top flights by on-time rate
More flights on this route
The breakdown
- Mon75%(514 flights)
- Tue72%(493 flights)
- Wed70%(480 flights)
- Thu70%(521 flights)
- Fri64%(519 flights)
- Sat76%(498 flights)
- Sun67%(527 flights)
- 3–6 AM83%(171 flights)
- 6–9 AM81%(1064 flights)
- 9 AM–12 PM77%(698 flights)
- 12–3 PM68%(497 flights)
- 3–6 PM56%(911 flights)
- 6–9 PM56%(211 flights)
Jun 73% → May 70% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 73% | 288 |
| July 2025 | 65% | 291 |
| August 2025 | 74% | 285 |
| September 2025 | 80% | 290 |
| October 2025 | 74% | 326 |
| November 2025 | 78% | 291 |
| December 2025 | 61% | 281 |
| January 2026 | 61% | 265 |
| February 2026 | 71% | 263 |
| March 2026 | 66% | 287 |
| April 2026 | 71% | 336 |
| May 2026 | 70% | 349 |
Keep nerding
Based on 3,685 historical flights, because apparently we checked. Historical flight data: U.S. Bureau of Transportation Statistics, June 2025 – May 2026. Data through May 2026. How we calculate this.