Route
IAH → ORD
George Bush Intercontinental Airport Chicago O'Hare International Airport
How punctual is this route?
- On-time arrivals
- 75.1%
- Less than 15 minutes late
- Cancelled
- 1.5%
- Of scheduled flights
- Average delay when late
- 87 min
- Flights arriving 15+ minutes late
- Flights tracked
- 6,142
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 38%
- Air traffic control & airport 38%
- Airline (crew, maintenance, cleaning) 21%
- Extreme weather 3%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Show as table
| Month | On time | Flights |
|---|---|---|
| September 2025 | 85.8% | 531 |
| October 2025 | 79.2% | 517 |
| November 2025 | 68.4% | 466 |
| December 2025 | 74.8% | 512 |
| January 2026 | 78.7% | 467 |
| February 2026 | 85.0% | 435 |
| March 2026 | 68.1% | 514 |
| April 2026 | 73.0% | 525 |
| May 2026 | 76.0% | 539 |
| June 2026 | 68.8% | 525 |
| July 2026 | 72.3% | 553 |
| August 2026 | 72.1% | 558 |
Source: U.S. DOT Bureau of Transportation Statistics on-time data, September 2025 – August 2026. Covers flights operated by reporting U.S. carriers. About our data
Airlines on this route
| Airline | Flights | On time | Cancelled | Avg. delay when late |
|---|---|---|---|---|
| United Airlines | 4,084 | 78.2% | 0.6% | 74 min |
| American Airlines | 883 | 67.3% | 3.5% | 120 min |
| Envoy Air | 350 | 73.5% | 1.1% | 66 min |
| Republic Airways | 309 | 74.6% | 3.6% | 88 min |
| Frontier Airlines | 275 | 67.8% | 3.6% | 145 min |
| NK | 239 | 61.7% | 5.0% | 73 min |
| SkyWest Airlines | 2 | 50.0% | 0.0% | 45 min |
Delay odds by flight
How often each flight number arrived 15 or more minutes late over the last year.
-
UA2616
13% late · 363 flights
-
UA787
28% late · 363 flights
-
UA2124
15% late · 349 flights
-
UA2182
12% late · 340 flights
-
UA1617
10% late · 309 flights
-
UA2197
34% late · 297 flights
-
UA2417
23% late · 281 flights
-
UA1752
28% late · 270 flights
-
UA1044
3% late · 173 flights
-
F93136
29% late · 153 flights
-
AA3106
11% late · 149 flights
-
UA2135
37% late · 137 flights
-
UA2296
52% late · 126 flights
-
F91882
36% late · 122 flights
-
NK1156
44% late · 94 flights
-
UA2458
33% late · 82 flights
-
UA2827
33% late · 82 flights
-
UA1293
13% late · 79 flights
-
AA1909
36% late · 76 flights
-
AA1913
54% late · 76 flights
-
AA1915
47% late · 76 flights
-
UA699
35% late · 68 flights
-
UA343
5% late · 65 flights
-
YX4426
22% late · 65 flights
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