Route Reliability
Houston → Chicago
IAH–ORD · 925 miles · George Bush Intercontinental Airport to Chicago O'Hare International Airport
- 75%
- Arrive within 15 minutes
- 13 min
- Average arrival delay
- 1.5%
- Cancelled
- 6,063
- Flights in the data
Data through May 2026.
Who flies it best
Ranked by on-time arrivals. Historical results, not predictions.
- 1.United Airlines79%3,981 flights
- 2.American Airlines71%1,505 flights
- 3.Spirit Airlines66%344 flights
- 4.Frontier Airlines62%233 flights
What the data says
Morning flights do better here.
IAH–ORD flights departing between 3–6 AM arrived on time 94% of the time, versus 57% between 3–6 PM.
Sunday scaries are real for this one.
IAH–ORD flights arrived on time 79% of the time on Tuesdays. On Sundays: 70%.
United Airlines has a clear lead on this route.
United Airlines arrived on time 79% of the time on this route; Frontier Airlines managed 62%.
Recent months have been rougher.
IAH–ORD flights arrived on time 73% of the time over the last three months in the data, compared with 80% in the three months before that.
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%(885 flights)
- Tue79%(793 flights)
- Wed78%(798 flights)
- Thu77%(877 flights)
- Fri73%(888 flights)
- Sat76%(790 flights)
- Sun70%(913 flights)
- 3–6 AM94%(345 flights)
- 6–9 AM87%(1513 flights)
- 9 AM–12 PM78%(1073 flights)
- 12–3 PM73%(807 flights)
- 3–6 PM57%(721 flights)
- 6–9 PM64%(1096 flights)
- 9 PM–12 AM77%(389 flights)
Jun 69% → May 77% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 69% | 498 |
| July 2025 | 67% | 502 |
| August 2025 | 73% | 522 |
| September 2025 | 86% | 530 |
| October 2025 | 80% | 514 |
| November 2025 | 69% | 449 |
| December 2025 | 76% | 508 |
| January 2026 | 80% | 460 |
| February 2026 | 86% | 433 |
| March 2026 | 69% | 492 |
| April 2026 | 74% | 503 |
| May 2026 | 77% | 533 |
Same trip, other airports
Keep nerding
Based on 6,063 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.