Route
ORD → IAH
Chicago O'Hare International Airport George Bush Intercontinental Airport
How punctual is this route?
- On-time arrivals
- 76.0%
- Less than 15 minutes late
- Cancelled
- 1.4%
- Of scheduled flights
- Average delay when late
- 78 min
- Flights arriving 15+ minutes late
- Flights tracked
- 6,141
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 45%
- Air traffic control & airport 24%
- Airline (crew, maintenance, cleaning) 24%
- Extreme weather 7%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Show as table
| Month | On time | Flights |
|---|---|---|
| September 2025 | 84.2% | 532 |
| October 2025 | 78.7% | 518 |
| November 2025 | 77.5% | 467 |
| December 2025 | 73.5% | 512 |
| January 2026 | 79.1% | 468 |
| February 2026 | 86.1% | 433 |
| March 2026 | 72.8% | 512 |
| April 2026 | 70.5% | 526 |
| May 2026 | 74.3% | 537 |
| June 2026 | 69.7% | 525 |
| July 2026 | 76.4% | 553 |
| August 2026 | 71.7% | 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 | 4,080 | 80.0% | 0.7% | 74 min |
| American Airlines | 882 | 59.8% | 3.1% | 83 min |
| Envoy Air | 349 | 74.6% | 1.4% | 66 min |
| Republic Airways | 311 | 76.6% | 2.3% | 76 min |
| Frontier Airlines | 276 | 78.6% | 3.3% | 107 min |
| NK | 241 | 65.7% | 4.6% | 92 min |
| SkyWest Airlines | 2 | 0.0% | 0.0% | 32 min |
Delay odds by flight
How often each flight number arrived 15 or more minutes late over the last year.
-
F93135
21% late · 276 flights
-
AA3144
47% late · 272 flights
-
UA1231
9% late · 270 flights
-
UA2638
14% late · 259 flights
-
UA2426
28% late · 255 flights
-
UA2665
26% late · 231 flights
-
UA714
27% late · 201 flights
-
UA2657
14% late · 185 flights
-
UA1475
40% late · 159 flights
-
UA1448
12% late · 156 flights
-
UA1373
19% late · 109 flights
-
UA2095
31% late · 109 flights
-
UA2483
15% late · 108 flights
-
UA2813
48% late · 103 flights
-
UA535
18% late · 103 flights
-
NK1157
43% late · 94 flights
-
UA1799
10% late · 82 flights
-
UA1954
20% late · 82 flights
-
UA2310
10% late · 82 flights
-
AA1909
38% late · 76 flights
-
AA1913
52% late · 76 flights
-
AA1915
33% late · 76 flights
-
UA1437
21% late · 73 flights
-
UA2225
19% late · 71 flights
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