Chicago (ORD) to Houston (IAH) flights
United Airlines, American Airlines, Frontier Airlines, Republic Airline fly nonstop from Chicago O'Hare International Airport to George Bush Intercontinental Airport, with about 121 flights a week in July 2026. The 925-mile flight takes about 2h 49m gate to gate.
- Distance
- 925 mi ยท 1,489 km
- Flight time
- 2h 49m
- Airlines
- 4
- Seats filled
- 83%
Airlines flying ORD to IAH
| Airline | Flights a week | Aircraft | Passengers (12 months) | Flight time |
|---|---|---|---|---|
| United Airlines | 82 | Airbus A321, Boeing 737-900ER, Boeing 737 MAX 9 | 632,605 | 2h 50m |
| American Airlines | 27 | Airbus A319, Boeing 737-800, Boeing 737 MAX 8 | 89,861 | 2h 42m |
| Frontier Airlines | 6 | Airbus A321, Airbus A320neo, Airbus A320-100/200 | 48,488 | 2h 56m |
| Republic Airline | 6 | Embraer E175 | 24,173 | 2h 53m |
| Envoy AirSeasonal or ended | n/a | Embraer E175, Embraer E170 | 22,493 | 2h 50m |
| Spirit AirlinesCeased operations 2026-05-02 | n/a | Airbus A321, Airbus A320-100/200, Airbus A320neo | 47,907 | 2h 39m |
| SkyWest AirlinesSeasonal or ended | n/a | Embraer E175, Bombardier CRJ200, Bombardier CRJ700 | 201 | 3h 19m |
Airlines are the operating carrier: regional airlines such as SkyWest or Horizon often fly under a larger airline's brand.
ORD to IAH flight schedule
26 flight numbers flew this route in August 2026, 18 of them almost daily. The first usually leaves at 5:30am and the last at 9:35pm. Times are local and can change; check with the airline before you book.
| Flight | Departs | Arrives | Days flown in August 2026 | On time (12 months) |
|---|---|---|---|---|
| UA 2310United Airlines | 5:30am | 8:18am | 10 | 90% |
| UA 2357United Airlines | 5:30am | 8:19am | 21 | 95% |
| UA 1799United Airlines | 6:29am | 9:18am | 10 | 90% |
| UA 1019United Airlines | 6:30am | 9:19am | 21 | 100% |
| UA 1231United Airlines | 7:30am | 10:25am | 31 | 91% |
| AA 1909American Airlines | 8:00am | 10:46am | 4 | 62% |
| AA 2504American Airlines | 8:00am | 10:44am | 27 | 78% |
| UA 535United Airlines | 8:50am | 11:46am | 31 | 82% |
| AA 3322American Airlines | 9:40am | 12:26pm | 27 | 85% |
| AA 1915American Airlines | 10:00am | 12:46pm | 4 | 67% |
| UA 2638United Airlines | 10:40am | 1:36pm | 31 | 86% |
| UA 1448United Airlines | 12:47pm | 3:40pm | 31 | 88% |
| AA 2329American Airlines | 12:59pm | 3:45pm | 27 | 63% |
| UA 2451United Airlines | 2:15pm | 5:20pm | 10 | 79% |
| UA 2635United Airlines | 2:16pm | 5:17pm | 21 | 62% |
| AA 1913American Airlines | 3:07pm | 6:01pm | 4 | 48% |
| AA 2416American Airlines | 3:10pm | 5:57pm | 27 | 40% |
| UA 714United Airlines | 4:11pm | 7:10pm | 31 | 73% |
| F9 3135Frontier Airlines | 5:30pm | 8:47pm | 31 | 79% |
| UA 1954United Airlines | 5:45pm | 8:50pm | 10 | 80% |
| UA 1921United Airlines | 5:53pm | 8:47pm | 21 | 62% |
| UA 2439United Airlines | 6:29pm | 9:20pm | 21 | 57% |
| UA 1475United Airlines | 6:40pm | 9:36pm | 10 | 60% |
| UA 2813United Airlines | 7:52pm | 10:44pm | 31 | 53% |
| AA 3144American Airlines | 9:15pm | 11:58pm | 31 | 53% |
| UA 2665United Airlines | 9:35pm | 12:27am | 31 | 74% |
Is ORD to IAH on time?
From September 2025 to August 2026, 76% of 6,141 flights arrived within 15 minutes of schedule and 1.4% were cancelled. Flights leaving around 7am were the most punctual (85%), those around 8pm the least (59%). Most delay time was caused by late-arriving aircraft (45%).
| Airline | Flights | On time | Average delay | Cancelled |
|---|---|---|---|---|
| United Airlines | 4,080 | 80% | 15 min | 0.7% |
| American Airlines | 1,544 | 67% | 26 min | 2.5% |
| Frontier Airlines | 276 | 79% | 23 min | 3.3% |
| Spirit Airlines | 241 | 66% | 31 min | 4.6% |
Airlines as sold: flights operated by regional partners count under the airline on the ticket. Average delay is across all completed flights, early arrivals counted as zero.
On-time arrivals by departure time
| Scheduled departure | Flights | On time, relative | On time |
|---|---|---|---|
| 5am to 6am | 286 | 91% | |
| 6am to 7am | 255 | 91% | |
| 7am to 8am | 552 | 85% | |
| 8am to 9am | 476 | 84% | |
| 9am to 10am | 343 | 76% | |
| 10am to 11am | 404 | 83% | |
| 12pm to 1pm | 395 | 85% | |
| 1pm to 2pm | 235 | 75% | |
| 2pm to 3pm | 497 | 72% | |
| 3pm to 4pm | 379 | 60% | |
| 4pm to 5pm | 379 | 74% | |
| 5pm to 6pm | 495 | 75% | |
| 6pm to 7pm | 291 | 65% | |
| 7pm to 8pm | 195 | 72% | |
| 8pm to 9pm | 431 | 59% | |
| 9pm to 10pm | 459 | 67% |
Flights by month
| Month | Flights | Flights, relative | Passengers |
|---|---|---|---|
| August 2025 | 521 | 73,423 | |
| September 2025 | 534 | 73,408 | |
| October 2025 | 521 | 76,241 | |
| November 2025 | 459 | 63,692 | |
| December 2025 | 510 | 77,465 | |
| January 2026 | 463 | 60,288 | |
| February 2026 | 436 | 59,995 | |
| March 2026 | 491 | 73,613 | |
| April 2026 | 516 | 66,160 | |
| May 2026 | 541 | 77,434 | |
| June 2026 | 517 | 80,587 | |
| July 2026 | 538 | 83,720 |
Related
Source: US Department of Transportation, T-100 Segment data, August 2025 to July 2026.